National Toxicology Program

National Toxicology Program
https://ntp.niehs.nih.gov/go/2453

TDMS Study 05077-01 Pathology Tables

NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97
Route: DOSED FEED                                                                                                 Time: 08:19:31




       Facility:  Battelle Columbus Laboratory

       Chemical CAS #:  67774-32-7

       Lock Date:  None

       Cage Range:  All

       Reasons For Removal:    All

       Removal Date Range:     All

       Treatment Groups:       Include All




































Note:  Animals arranged according to CID number

                                                              Page   1

NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 7| 7| 6| 7| 7| 7| 7| 7| 5| 6| 7| 7| 7| 6| 7| 7| 7| 7| 6| 7| 6| 7| 7| 7| 7|             
                             DAY ON TEST   | 2| 2| 5| 2| 2| 2| 3| 3| 4| 8| 3| 3| 3| 8| 3| 3| 3| 3| 5| 3| 8| 3| 3| 3| 3|             
                                           | 9| 9| 6| 9| 9| 9| 0| 0| 4| 1| 0| 0| 0| 1| 1| 1| 1| 1| 6| 1| 7| 2| 2| 2| 2|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   FISCHER 344 RATS FEMALE                 | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
                               ANIMAL ID   | 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8|             
    0 PPM                                  | 1| 1| 1| 1| 1| 2| 2| 2| 2| 2| 3| 3| 3| 3| 3| 4| 4| 4| 4| 4| 5| 5| 5| 5| 5|             
    0-0                                    | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|             
 _____________________________________________________________________________________________________________________|             
 ALIMENTARY SYSTEM                         |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Esophagus                               | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Large                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Large, Cecum                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Intestine Large, Colon                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Large, Rectum                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Small                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Small, Duodenum               | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Small, Ileum                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Small, Jejunum                | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Liver                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                      X                                      X     X  X  X|             
                                            __________________________________________________________________________|             
   Mesentery                               |                            +                                             |             
      Mesothelioma Malignant, Multifocal   |                            X                                             |             
                                            __________________________________________________________________________|             
   Pancreas                                | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  I  +  +|             
                                            __________________________________________________________________________|             
   Salivary Glands                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Stomach                                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Stomach, Forestomach                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Stomach, Glandular                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             
 CARDIOVASCULAR SYSTEM                     |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Heart                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             
 ENDOCRINE SYSTEM                          |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Adrenal Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Adrenal Gland, Cortex                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |                                  X                                       |             
      Leukemia Mononuclear                 |                      X                                                   |             
                                            __________________________________________________________________________|             
   Adrenal Gland, Medulla                  | +  +  +  +  +     +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                          |             
      Pheochromocytoma Benign              |                                                          X               |             
      Bilateral, Pheochromocytoma Benign   |                                                 X                        |             
                                            __________________________________________________________________________|             
   Islets, Pancreatic                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  I  +  +|             
                                            __________________________________________________________________________|             
   Parathyroid Gland                       | +  +  +  +  +  +  +  +  +  +  +  M  M  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |                                                    X                     |             
                                            __________________________________________________________________________|             
   Pituitary Gland                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Pars Distalis, Adenoma               | X     X  X     X     X     X     X  X           X     X                 X|             
                                            __________________________________________________________________________|             
   Thyroid Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Bilateral, C-Cell, Adenoma           |                                     X                                    |             
      C-Cell, Adenoma                      |             X                             X  X                    X  X   |             
 _____________________________________________________________________________________________________________________|             
 GENERAL BODY SYSTEM                       |                                                                          |             
                                           |                                                                          |             
    None                                   |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 GENITAL SYSTEM                            |                                                                          |             
 _____________________________________________________________________________________________________________________|             
                                                             Page   2                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 7| 7| 6| 7| 7| 7| 7| 7| 5| 6| 7| 7| 7| 6| 7| 7| 7| 7| 6| 7| 6| 7| 7| 7| 7|             
                             DAY ON TEST   | 2| 2| 5| 2| 2| 2| 3| 3| 4| 8| 3| 3| 3| 8| 3| 3| 3| 3| 5| 3| 8| 3| 3| 3| 3|             
                                           | 9| 9| 6| 9| 9| 9| 0| 0| 4| 1| 0| 0| 0| 1| 1| 1| 1| 1| 6| 1| 7| 2| 2| 2| 2|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   FISCHER 344 RATS FEMALE                 | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
                               ANIMAL ID   | 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8|             
    0 PPM                                  | 1| 1| 1| 1| 1| 2| 2| 2| 2| 2| 3| 3| 3| 3| 3| 4| 4| 4| 4| 4| 5| 5| 5| 5| 5|             
    0-0                                    | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|             
 _____________________________________________________________________________________________________________________|             
 GENITAL SYSTEM - cont                     |                                                                          |             
                                           |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Clitoral Gland                          | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |                                                                          |             
                                            __________________________________________________________________________|             
   Ovary                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Uterus                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenocarcinoma                       |    X                                                                     |             
      Polyp Stromal                        | X              X                                X                    X   |             
      Schwannoma Malignant                 |                                                                          |             
      Epithelium, Adenoma                  |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 HEMATOPOIETIC SYSTEM                      |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Bone Marrow                             | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Femoral, Leukemia Mononuclear        |                                                                          |             
                                            __________________________________________________________________________|             
   Lymph Node                              | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Mandibular, Leukemia Mononuclear     |                      X                                      X            |             
      Mediastinal, Leukemia Mononuclear    |                                                                          |             
      Renal, Leukemia Mononuclear          |                                                                          |             
                                            __________________________________________________________________________|             
   Lymph Node, Mesenteric                  |                +           +                                             |             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Spleen                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                      X                                      X     X  X  X|             
                                            __________________________________________________________________________|             
   Thymus                                  | +  +  +  +  +  +  +  +  +  +  +  +  M  M  +  +  +  +  +  +  +  +  +  +  M|             
      Leukemia Mononuclear                 |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 INTEGUMENTARY SYSTEM                      |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Mammary Gland                           | +  +  +  +  +  +     +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Fibroadenoma                         |                                                                          |             
                                            __________________________________________________________________________|             
   Skin                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Basal Cell Adenoma                   |       X                                                                  |             
      Squamous Cell Papilloma              |                                           X                              |             
      Trichoepithelioma                    |                                                                          |             
      Subcutaneous Tissue, Sarcoma         |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 MUSCULOSKELETAL SYSTEM                    |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Bone                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Skeletal Muscle                         |                            +                                             |             
      Abdominal, Mesothelioma Malignant,   |                                                                          |             
           Multifocal                      |                            X                                             |             
 _____________________________________________________________________________________________________________________|             
 NERVOUS SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Brain                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Astrocytoma Malignant                |                                                       X                  |             
                                            __________________________________________________________________________|             
   Spinal Cord                             |                         +              +                                 |             
 _____________________________________________________________________________________________________________________|             
 RESPIRATORY SYSTEM                        |                                                                          |             
 _____________________________________________________________________________________________________________________|             
                                                             Page   3                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 7| 7| 6| 7| 7| 7| 7| 7| 5| 6| 7| 7| 7| 6| 7| 7| 7| 7| 6| 7| 6| 7| 7| 7| 7|             
                             DAY ON TEST   | 2| 2| 5| 2| 2| 2| 3| 3| 4| 8| 3| 3| 3| 8| 3| 3| 3| 3| 5| 3| 8| 3| 3| 3| 3|             
                                           | 9| 9| 6| 9| 9| 9| 0| 0| 4| 1| 0| 0| 0| 1| 1| 1| 1| 1| 6| 1| 7| 2| 2| 2| 2|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   FISCHER 344 RATS FEMALE                 | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
                               ANIMAL ID   | 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8|             
    0 PPM                                  | 1| 1| 1| 1| 1| 2| 2| 2| 2| 2| 3| 3| 3| 3| 3| 4| 4| 4| 4| 4| 5| 5| 5| 5| 5|             
    0-0                                    | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|             
 _____________________________________________________________________________________________________________________|             
 RESPIRATORY SYSTEM - cont                 |                                                                          |             
                                           |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Lung                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                             X            |             
                                            __________________________________________________________________________|             
   Nose                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Trachea                                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             
 SPECIAL SENSES SYSTEM                     |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Eye                                     |                +           +                                   +         |             
 _____________________________________________________________________________________________________________________|             
 URINARY SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Kidney                                  | +  +  +  +  +  +  +  +  +     +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Urinary Bladder                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             
 SYSTEMIC LESIONS                          |                                                                          |             
                                            __________________________________________________________________________|             
   Multiple Organs                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                      X                                      X     X  X  X|             
 _____________________________________________________________________________________________________________________|             
                                                             Page   4                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 7| 7| 7| 7| 7| 7| 5| 7| 7| 7| 7| 7| 7| 7| 7| 7| 6| 7| 5| 7| 7| 7| 3| 7| 7|            |
                             DAY ON TEST   | 3| 3| 3| 3| 3| 3| 7| 3| 3| 3| 3| 3| 3| 3| 3| 3| 7| 3| 2| 3| 3| 3| 3| 3| 3|            |
                                           | 2| 3| 3| 3| 3| 3| 9| 6| 6| 6| 6| 6| 7| 7| 7| 7| 8| 7| 3| 8| 8| 8| 4| 8| 8|            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     O      |
   FISCHER 344 RATS FEMALE                 | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     T      |
                               ANIMAL ID   | 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 9| 9| 9| 9| 9|     A      |
    0 PPM                                  | 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 8| 8| 8| 8| 8| 9| 9| 9| 9| 9| 0| 0| 0| 0| 0|     L      |
    0-0                                    | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|            |
 __________________________________________________________________________________________________________________________________ 
 ALIMENTARY SYSTEM                         |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Esophagus                               | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Intestine Large                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Intestine Large, Cecum                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 |                                                 X                        |          1 |
                                            __________________________________________________________________________|____________|
   Intestine Large, Colon                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Intestine Large, Rectum                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Intestine Small                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Intestine Small, Duodenum               | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Intestine Small, Ileum                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Intestine Small, Jejunum                | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Liver                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 |       X              X     X        X  X  X     X              X         |         13 |
                                            __________________________________________________________________________|____________|
   Mesentery                               |                                           +                              |   2        |
      Mesothelioma Malignant, Multifocal   |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Pancreas                                | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
                                            __________________________________________________________________________|____________|
   Salivary Glands                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Stomach                                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Stomach, Forestomach                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Stomach, Glandular                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
 _____________________________________________________________________________________________________________________|            |
 CARDIOVASCULAR SYSTEM                     |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Heart                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
 _____________________________________________________________________________________________________________________|            |
 ENDOCRINE SYSTEM                          |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Adrenal Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Adrenal Gland, Cortex                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Adenoma                              |                                                                          |          1 |
      Leukemia Mononuclear                 |                                                 X                        |          2 |
                                            __________________________________________________________________________|____________|
   Adrenal Gland, Medulla                  | +  +  +  +  +     +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  48        |
      Leukemia Mononuclear                 |                                                 X                        |          1 |
      Pheochromocytoma Benign              |                                                                      X   |          2 |
      Bilateral, Pheochromocytoma Benign   |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Islets, Pancreatic                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
                                            __________________________________________________________________________|____________|
   Parathyroid Gland                       | +  +  +  +  +  +  +  +  M  +  M  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  46        |
      Adenoma                              |       X                                                                  |          2 |
                                            __________________________________________________________________________|____________|
   Pituitary Gland                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Pars Distalis, Adenoma               |    X              X  X                 X  X        X  X     X  X     X   |         21 |
                                            __________________________________________________________________________|____________|
   Thyroid Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Bilateral, C-Cell, Adenoma           |                                                                          |          1 |
 __________________________________________________________________________________________________________________________________ 
                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  
                                                             Page   5                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 7| 7| 7| 7| 7| 7| 5| 7| 7| 7| 7| 7| 7| 7| 7| 7| 6| 7| 5| 7| 7| 7| 3| 7| 7|            |
                             DAY ON TEST   | 3| 3| 3| 3| 3| 3| 7| 3| 3| 3| 3| 3| 3| 3| 3| 3| 7| 3| 2| 3| 3| 3| 3| 3| 3|            |
                                           | 2| 3| 3| 3| 3| 3| 9| 6| 6| 6| 6| 6| 7| 7| 7| 7| 8| 7| 3| 8| 8| 8| 4| 8| 8|            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     O      |
   FISCHER 344 RATS FEMALE                 | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     T      |
                               ANIMAL ID   | 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 9| 9| 9| 9| 9|     A      |
    0 PPM                                  | 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 8| 8| 8| 8| 8| 9| 9| 9| 9| 9| 0| 0| 0| 0| 0|     L      |
    0-0                                    | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|            |
 __________________________________________________________________________________________________________________________________ 
 ENDOCRINE SYSTEM - cont                   |                                                                          |            |
                                           |                                                                          |            |
      C-Cell, Adenoma                      |    X           X     X                    X                    X         |         10 |
 _____________________________________________________________________________________________________________________|            |
 GENERAL BODY SYSTEM                       |                                                                          |            |
                                           |                                                                          |            |
    None                                   |                                                                          |            |
 _____________________________________________________________________________________________________________________|            |
 GENITAL SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Clitoral Gland                          | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Adenoma                              |       X                    X  X                                          |          3 |
                                            __________________________________________________________________________|____________|
   Ovary                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Uterus                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Adenocarcinoma                       | X                                                                        |          2 |
      Polyp Stromal                        |                      X     X                       X                     |          7 |
      Schwannoma Malignant                 |                                        X                                 |          1 |
      Epithelium, Adenoma                  |             X                                                            |          1 |
 _____________________________________________________________________________________________________________________|            |
 HEMATOPOIETIC SYSTEM                      |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Bone Marrow                             | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Femoral, Leukemia Mononuclear        |                                        X                                 |          1 |
                                            __________________________________________________________________________|____________|
   Lymph Node                              | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Mandibular, Leukemia Mononuclear     |                                        X  X     X              X         |          6 |
      Mediastinal, Leukemia Mononuclear    |                                                 X                        |          1 |
      Renal, Leukemia Mononuclear          |                                                 X                        |          1 |
                                            __________________________________________________________________________|____________|
   Lymph Node, Mesenteric                  |                                           +     +                        |   4        |
      Leukemia Mononuclear                 |                                                 X                        |          1 |
                                            __________________________________________________________________________|____________|
   Spleen                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 |       X              X     X        X  X  X     X              X     X   |         14 |
                                            __________________________________________________________________________|____________|
   Thymus                                  | M  M  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +  +  +  +  +  +  +  +|  44        |
      Leukemia Mononuclear                 |                                                 X                        |          1 |
 _____________________________________________________________________________________________________________________|            |
 INTEGUMENTARY SYSTEM                      |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Mammary Gland                           | +  M  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  48        |
      Fibroadenoma                         |                      X           X     X                             X   |          4 |
                                            __________________________________________________________________________|____________|
   Skin                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Basal Cell Adenoma                   |                                                                          |          1 |
      Squamous Cell Papilloma              |                                                                          |          1 |
      Trichoepithelioma                    |    X                                                                     |          1 |
      Subcutaneous Tissue, Sarcoma         |                                                                   X      |          1 |
 _____________________________________________________________________________________________________________________|            |
 MUSCULOSKELETAL SYSTEM                    |                                                                          |            |
                                           |                                                                          |            |
 __________________________________________________________________________________________________________________________________ 
                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  
                                                             Page   6                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 7| 7| 7| 7| 7| 7| 5| 7| 7| 7| 7| 7| 7| 7| 7| 7| 6| 7| 5| 7| 7| 7| 3| 7| 7|            |
                             DAY ON TEST   | 3| 3| 3| 3| 3| 3| 7| 3| 3| 3| 3| 3| 3| 3| 3| 3| 7| 3| 2| 3| 3| 3| 3| 3| 3|            |
                                           | 2| 3| 3| 3| 3| 3| 9| 6| 6| 6| 6| 6| 7| 7| 7| 7| 8| 7| 3| 8| 8| 8| 4| 8| 8|            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     O      |
   FISCHER 344 RATS FEMALE                 | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     T      |
                               ANIMAL ID   | 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 9| 9| 9| 9| 9|     A      |
    0 PPM                                  | 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 8| 8| 8| 8| 8| 9| 9| 9| 9| 9| 0| 0| 0| 0| 0|     L      |
    0-0                                    | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|            |
 __________________________________________________________________________________________________________________________________ 
 MUSCULOSKELETAL SYSTEM - cont             |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Bone                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Skeletal Muscle                         |                                                                          |   1        |
      Abdominal, Mesothelioma Malignant,   |                                                                          |            |
           Multifocal                      |                                                                          |          1 |
 _____________________________________________________________________________________________________________________|            |
 NERVOUS SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Brain                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Astrocytoma Malignant                |             X                                                            |          2 |
                                            __________________________________________________________________________|____________|
   Spinal Cord                             |                                                                          |   2        |
 _____________________________________________________________________________________________________________________|            |
 RESPIRATORY SYSTEM                        |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Lung                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 |                                                 X              X         |          3 |
                                            __________________________________________________________________________|____________|
   Nose                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Trachea                                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
 _____________________________________________________________________________________________________________________|            |
 SPECIAL SENSES SYSTEM                     |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Eye                                     |                                                                      +   |   4        |
 _____________________________________________________________________________________________________________________|            |
 URINARY SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Kidney                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
                                            __________________________________________________________________________|____________|
   Urinary Bladder                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
 __________________________________________________________________________________________________________________________________ 
 SYSTEMIC LESIONS                          |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Multiple Organs                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 |       X              X     X        X  X  X     X              X     X   |         14 |
 __________________________________________________________________________________________________________________________________ 
                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  
                                                             Page   7                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 7| 7| 7| 6| 7| 7| 7| 7| 5| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 5| 7| 7| 7| 7|             
                             DAY ON TEST   | 2| 2| 2| 3| 2| 2| 3| 3| 9| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 7| 3| 1| 3| 3|             
                                           | 9| 9| 9| 5| 9| 9| 0| 0| 1| 0| 0| 0| 1| 1| 1| 1| 1| 2| 2| 2| 9| 2| 0| 2| 3|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   FISCHER 344 RATS FEMALE                 | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
                               ANIMAL ID   | 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9|             
    0 PPM                                  | 1| 1| 1| 1| 1| 2| 2| 2| 2| 2| 3| 3| 3| 3| 3| 4| 4| 4| 4| 4| 5| 5| 5| 5| 5|             
    10-0                                   | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|             
 _____________________________________________________________________________________________________________________|             
 ALIMENTARY SYSTEM                         |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Esophagus                               |          +              +                                   +     +      |             
                                            __________________________________________________________________________|             
   Intestine Large                         |          +              +                                   +     +      |             
                                            __________________________________________________________________________|             
   Intestine Large, Cecum                  |          M              +                                   +     +      |             
                                            __________________________________________________________________________|             
   Intestine Large, Colon                  |          +              +                                   +     +      |             
                                            __________________________________________________________________________|             
   Intestine Large, Rectum                 |          +              +                                   +     +      |             
                                            __________________________________________________________________________|             
   Intestine Small                         |          +              +                                +  +     +      |             
                                            __________________________________________________________________________|             
   Intestine Small, Duodenum               |          +              +                                +  +     +      |             
      Schwannoma Malignant                 |                                                          X               |             
      Serosa, Adenocarcinoma, Metastatic,  |                                                                          |             
           Uterus                          |                                                                          |             
                                            __________________________________________________________________________|             
   Intestine Small, Ileum                  |          +              +                                   +     +      |             
                                            __________________________________________________________________________|             
   Intestine Small, Jejunum                |          +              +                                   +     +      |             
                                            __________________________________________________________________________|             
   Liver                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                X  X                          X  X           X     X      |             
                                            __________________________________________________________________________|             
   Mesentery                               |                                                                          |             
                                            __________________________________________________________________________|             
   Pancreas                                |          +              +                    +              +     +      |             
      Adenocarcinoma, Metastatic, Uterus   |                                                                          |             
                                            __________________________________________________________________________|             
   Salivary Glands                         |          +              +                                   +     +      |             
                                            __________________________________________________________________________|             
   Stomach                                 | +  +  +  +  +  +  +  +  +  +  +     +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Serosa, Adenocarcinoma, Metastatic,  |                                                                          |             
           Uterus                          |                                                                          |             
                                            __________________________________________________________________________|             
   Stomach, Forestomach                    | +  +  +  +  +  +  +  +  +  +  +     +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Stomach, Glandular                      | +  +  +  +  +  +  +  +  +  +  +     +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Tongue                                  |                                                          +               |             
      Squamous Cell Papilloma              |                                                          X               |             
 _____________________________________________________________________________________________________________________|             
 CARDIOVASCULAR SYSTEM                     |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Heart                                   |          +              +                                   +     +      |             
      Leukemia Mononuclear                 |                                                                   X      |             
 _____________________________________________________________________________________________________________________|             
 ENDOCRINE SYSTEM                          |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Adrenal Gland                           |          +              +                                   +     +      |             
      Capsule, Adenocarcinoma, Metastatic, |                                                                          |             
           Uterus                          |                                                                          |             
                                            __________________________________________________________________________|             
   Adrenal Gland, Cortex                   |          +              +                                   +     +      |             
      Adenoma                              |                                                                          |             
      Leukemia Mononuclear                 |                                                                   X      |             
                                            __________________________________________________________________________|             
   Adrenal Gland, Medulla                  |          +              +                                   +     +      |             
      Leukemia Mononuclear                 |                                                                   X      |             
                                            __________________________________________________________________________|             
   Islets, Pancreatic                      |          +              +                    +              +     +      |             
      Carcinoma                            |                                              X                           |             
                                            __________________________________________________________________________|             
   Parathyroid Gland                       |          +              +                                   +     +      |             
                                            __________________________________________________________________________|             
   Pituitary Gland                         | +  +  +  +           +  +                    +  +  +     +  +     +      |             
      Pars Distalis, Adenoma               |    X  X              X  X                    X  X                        |             
 _____________________________________________________________________________________________________________________|             
                                                             Page   8                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 7| 7| 7| 6| 7| 7| 7| 7| 5| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 5| 7| 7| 7| 7|             
                             DAY ON TEST   | 2| 2| 2| 3| 2| 2| 3| 3| 9| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 7| 3| 1| 3| 3|             
                                           | 9| 9| 9| 5| 9| 9| 0| 0| 1| 0| 0| 0| 1| 1| 1| 1| 1| 2| 2| 2| 9| 2| 0| 2| 3|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   FISCHER 344 RATS FEMALE                 | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
                               ANIMAL ID   | 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9|             
    0 PPM                                  | 1| 1| 1| 1| 1| 2| 2| 2| 2| 2| 3| 3| 3| 3| 3| 4| 4| 4| 4| 4| 5| 5| 5| 5| 5|             
    10-0                                   | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|             
 _____________________________________________________________________________________________________________________|             
 ENDOCRINE SYSTEM - cont                   |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Thyroid Gland                           |          +              +     +                             +     +      |             
      C-Cell, Adenoma                      |          X                    X                                          |             
      C-Cell, Adenoma, Moderate            |                                                                          |             
      C-Cell, Carcinoma                    |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 GENERAL BODY SYSTEM                       |                                                                          |             
                                           |                                                                          |             
    None                                   |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 GENITAL SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Clitoral Gland                          | +        +              +                 +                 +     +  +   |             
      Adenoma                              |                                                                          |             
      Bilateral, Adenoma                   |                                           X                              |             
                                            __________________________________________________________________________|             
   Ovary                                   |       +  +        +     +     +  +           +     +        +     +      |             
      Periovarian Tissue, Adenocarcinoma,  |                                                                          |             
           Metastatic, Uterus              |                                                                          |             
                                            __________________________________________________________________________|             
   Uterus                                  |          +              +     +  +                          +     +      |             
      Adenocarcinoma                       |                                                                          |             
      Polyp Stromal                        |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 HEMATOPOIETIC SYSTEM                      |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Bone Marrow                             |          +              +                                   +     +      |             
                                            __________________________________________________________________________|             
   Lymph Node                              |          M              +                                   +     +      |             
      Mandibular, Leukemia Mononuclear     |                                                             X            |             
      Mediastinal, Adenocarcinoma,         |                                                                          |             
          Metastatic, Uterus               |                                                                          |             
      Mediastinal, Leukemia Mononuclear    |                                                                          |             
                                            __________________________________________________________________________|             
   Lymph Node, Mesenteric                  |                                                                          |             
      Adenocarcinoma, Metastatic, Uterus   |                                                                          |             
                                            __________________________________________________________________________|             
   Spleen                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                X  X  X                       X  X           X     X      |             
                                            __________________________________________________________________________|             
   Thymus                                  |          +              +                                   M     +      |             
      Leukemia Mononuclear                 |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 INTEGUMENTARY SYSTEM                      |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Mammary Gland                           |    +  +  +              +                 +              +  M     +      |             
      Carcinoma                            |                                                          X               |             
      Fibroadenoma                         |    X  X  X                                X                              |             
                                            __________________________________________________________________________|             
   Skin                                    |          +              +                                   +     +      |             
      Subcutaneous Tissue, Fibroma         |                                                             X            |             
 _____________________________________________________________________________________________________________________|             
 MUSCULOSKELETAL SYSTEM                    |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Bone                                    |          +              +                                   +     +      |             
 _____________________________________________________________________________________________________________________|             
 NERVOUS SYSTEM                            |                                                                          |             
                                           |                                                                          |             
 _____________________________________________________________________________________________________________________|             
                                                             Page   9                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 7| 7| 7| 6| 7| 7| 7| 7| 5| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 5| 7| 7| 7| 7|             
                             DAY ON TEST   | 2| 2| 2| 3| 2| 2| 3| 3| 9| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 7| 3| 1| 3| 3|             
                                           | 9| 9| 9| 5| 9| 9| 0| 0| 1| 0| 0| 0| 1| 1| 1| 1| 1| 2| 2| 2| 9| 2| 0| 2| 3|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   FISCHER 344 RATS FEMALE                 | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
                               ANIMAL ID   | 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9|             
    0 PPM                                  | 1| 1| 1| 1| 1| 2| 2| 2| 2| 2| 3| 3| 3| 3| 3| 4| 4| 4| 4| 4| 5| 5| 5| 5| 5|             
    10-0                                   | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|             
 _____________________________________________________________________________________________________________________|             
 NERVOUS SYSTEM - cont                     |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Brain                                   |          +              +                                   +     +      |             
                                            __________________________________________________________________________|             
   Spinal Cord                             |                         +                                                |             
 _____________________________________________________________________________________________________________________|             
 RESPIRATORY SYSTEM                        |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Lung                                    |          +              +                                   +     +      |             
      Adenocarcinoma, Metastatic, Uterus   |                                                                          |             
      Leukemia Mononuclear                 |                                                                   X      |             
                                            __________________________________________________________________________|             
   Nose                                    |          +              +                                   +     +      |             
                                            __________________________________________________________________________|             
   Trachea                                 |          +              +                                   +     +      |             
 _____________________________________________________________________________________________________________________|             
 SPECIAL SENSES SYSTEM                     |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Eye                                     |                                        +                                 |             
 _____________________________________________________________________________________________________________________|             
 URINARY SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Kidney                                  |          +              +                                   +     +      |             
      Leukemia Mononuclear                 |                                                                   X      |             
                                            __________________________________________________________________________|             
   Urinary Bladder                         |          +              +                                   +     +      |             
 _____________________________________________________________________________________________________________________|             
 SYSTEMIC LESIONS                          |                                                                          |             
                                            __________________________________________________________________________|             
   Multiple Organs                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                X  X  X                       X  X           X     X      |             
 _____________________________________________________________________________________________________________________|             
                                                             Page  10                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 7| 7| 6| 7| 5| 7| 7| 7| 7| 7| 7| 7| 6| 7| 6| 7| 7| 7| 6| 7| 7| 7| 7| 7| 7|            |
                             DAY ON TEST   | 0| 3| 6| 3| 1| 3| 3| 3| 3| 3| 3| 2| 5| 3| 0| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3|            |
                                           | 7| 3| 6| 3| 5| 3| 3| 6| 6| 6| 6| 4| 2| 7| 6| 7| 7| 7| 5| 7| 8| 8| 8| 8| 8|            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     O      |
   FISCHER 344 RATS FEMALE                 | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 1| 1| 1| 1| 1|     T      |
                               ANIMAL ID   | 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 0| 0| 0| 0| 0|     A      |
    0 PPM                                  | 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 8| 8| 8| 8| 8| 9| 9| 9| 9| 9| 0| 0| 0| 0| 0|     L      |
    10-0                                   | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|            |
 __________________________________________________________________________________________________________________________________ 
 ALIMENTARY SYSTEM                         |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Esophagus                               | +     +     +                    +  +     +           +                  |  11        |
                                            __________________________________________________________________________|____________|
   Intestine Large                         | +     +     +                    +  +     +           +                  |  11        |
                                            __________________________________________________________________________|____________|
   Intestine Large, Cecum                  | +     +     +                    +  +     +           +                  |  10        |
                                            __________________________________________________________________________|____________|
   Intestine Large, Colon                  | +     +     +                    +  +     +           +                  |  11        |
                                            __________________________________________________________________________|____________|
   Intestine Large, Rectum                 | +     +     +                    +  +     +           +                  |  11        |
                                            __________________________________________________________________________|____________|
   Intestine Small                         | +     +     +                    +  +     +           +                  |  12        |
                                            __________________________________________________________________________|____________|
   Intestine Small, Duodenum               | +     +     +                    +  +     +           +                  |  12        |
      Schwannoma Malignant                 |                                                                          |          1 |
      Serosa, Adenocarcinoma, Metastatic,  |                                                                          |            |
           Uterus                          |                                           X                              |          1 |
                                            __________________________________________________________________________|____________|
   Intestine Small, Ileum                  | +     +     +                    +  +                 +                  |  10        |
                                            __________________________________________________________________________|____________|
   Intestine Small, Jejunum                | +     +     +                    +  +                 +                  |  10        |
                                            __________________________________________________________________________|____________|
   Liver                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 |    X        X  X                                      X              X  X|         12 |
                                            __________________________________________________________________________|____________|
   Mesentery                               |                         +                                                |   1        |
                                            __________________________________________________________________________|____________|
   Pancreas                                | +     +     +                    +  +     +           +                  |  12        |
      Adenocarcinoma, Metastatic, Uterus   |                                           X                              |          1 |
                                            __________________________________________________________________________|____________|
   Salivary Glands                         | +     +     +                    +  +     +           +                  |  11        |
                                            __________________________________________________________________________|____________|
   Stomach                                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
      Serosa, Adenocarcinoma, Metastatic,  |                                                                          |            |
           Uterus                          |                                           X                              |          1 |
                                            __________________________________________________________________________|____________|
   Stomach, Forestomach                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
                                            __________________________________________________________________________|____________|
   Stomach, Glandular                      | +  +  +     +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  48        |
                                            __________________________________________________________________________|____________|
   Tongue                                  |                                                                          |   1        |
      Squamous Cell Papilloma              |                                                                          |          1 |
 _____________________________________________________________________________________________________________________|            |
 CARDIOVASCULAR SYSTEM                     |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Heart                                   | +     +     +                    +  +     +           +                  |  11        |
      Leukemia Mononuclear                 |             X                                                            |          2 |
 _____________________________________________________________________________________________________________________|            |
 ENDOCRINE SYSTEM                          |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Adrenal Gland                           | +     +     +                    +  +     +           +                  |  11        |
      Capsule, Adenocarcinoma, Metastatic, |                                                                          |            |
           Uterus                          |                                           X                              |          1 |
                                            __________________________________________________________________________|____________|
   Adrenal Gland, Cortex                   | +     +     +                    +  +                 +                  |  10        |
      Adenoma                              | X                                                                        |          1 |
      Leukemia Mononuclear                 |             X                                         X                  |          3 |
                                            __________________________________________________________________________|____________|
   Adrenal Gland, Medulla                  | +     +     +                    +  +                 +                  |  10        |
      Leukemia Mononuclear                 |             X                                         X                  |          3 |
 __________________________________________________________________________________________________________________________________ 
                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  
                                                             Page  11                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 7| 7| 6| 7| 5| 7| 7| 7| 7| 7| 7| 7| 6| 7| 6| 7| 7| 7| 6| 7| 7| 7| 7| 7| 7|            |
                             DAY ON TEST   | 0| 3| 6| 3| 1| 3| 3| 3| 3| 3| 3| 2| 5| 3| 0| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3|            |
                                           | 7| 3| 6| 3| 5| 3| 3| 6| 6| 6| 6| 4| 2| 7| 6| 7| 7| 7| 5| 7| 8| 8| 8| 8| 8|            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     O      |
   FISCHER 344 RATS FEMALE                 | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 1| 1| 1| 1| 1|     T      |
                               ANIMAL ID   | 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 0| 0| 0| 0| 0|     A      |
    0 PPM                                  | 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 8| 8| 8| 8| 8| 9| 9| 9| 9| 9| 0| 0| 0| 0| 0|     L      |
    10-0                                   | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|            |
 __________________________________________________________________________________________________________________________________ 
 ENDOCRINE SYSTEM - cont                   |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Islets, Pancreatic                      | +     +     +                    +  +     +           +                  |  12        |
      Carcinoma                            |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Parathyroid Gland                       | +     M     +                    +  +     M           +                  |   9        |
                                            __________________________________________________________________________|____________|
   Pituitary Gland                         | +     +  +  +  +  +     +  +  +  +  +  +  +  +  +  +  +  +  +     +  +  +|  34        |
      Pars Distalis, Adenoma               | X     X  X     X  X     X     X  X     X     X     X        X     X      |         19 |
                                            __________________________________________________________________________|____________|
   Thyroid Gland                           | +     +     +                    +  +     +           +                  |  12        |
      C-Cell, Adenoma                      |       X                                   X                              |          4 |
      C-Cell, Adenoma, Moderate            | X                                                                        |          1 |
      C-Cell, Carcinoma                    |                                     X                                    |          1 |
 _____________________________________________________________________________________________________________________|            |
 GENERAL BODY SYSTEM                       |                                                                          |            |
                                           |                                                                          |            |
    None                                   |                                                                          |            |
 _____________________________________________________________________________________________________________________|            |
 GENITAL SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Clitoral Gland                          | +     +     +                 +  +  +  +  M           +                  |  15        |
      Adenoma                              |                                        X                                 |          1 |
      Bilateral, Adenoma                   |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Ovary                                   | +     +     +  +           +     +  +     +  +        +     +     +  +   |  23        |
      Periovarian Tissue, Adenocarcinoma,  |                                                                          |            |
           Metastatic, Uterus              |                                           X                              |          1 |
                                            __________________________________________________________________________|____________|
   Uterus                                  | +     +     +                    +  +     +           +     +  +     +  +|  17        |
      Adenocarcinoma                       |                                           X                              |          1 |
      Polyp Stromal                        |                                                             X  X     X  X|          4 |
 _____________________________________________________________________________________________________________________|            |
 HEMATOPOIETIC SYSTEM                      |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Bone Marrow                             | +     +     +                    +  +     +           +                  |  11        |
                                            __________________________________________________________________________|____________|
   Lymph Node                              | +     +     +  +                 +  +     +           +                  |  11        |
      Mandibular, Leukemia Mononuclear     |             X                                         X                  |          3 |
      Mediastinal, Adenocarcinoma,         |                                                                          |            |
          Metastatic, Uterus               |                                           X                              |          1 |
      Mediastinal, Leukemia Mononuclear    |                                                       X                  |          1 |
                                            __________________________________________________________________________|____________|
   Lymph Node, Mesenteric                  |                +                          +                              |   2        |
      Adenocarcinoma, Metastatic, Uterus   |                                           X                              |          1 |
                                            __________________________________________________________________________|____________|
   Spleen                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 |    X        X  X                                      X              X  X|         13 |
                                            __________________________________________________________________________|____________|
   Thymus                                  | +     +     +                    +  M     +           +                  |   9        |
      Leukemia Mononuclear                 |                                                       X                  |          1 |
 _____________________________________________________________________________________________________________________|            |
 INTEGUMENTARY SYSTEM                      |                                                                          |            |
                                           |                                                                          |            |
 __________________________________________________________________________________________________________________________________ 
                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  
                                                             Page  12                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 7| 7| 6| 7| 5| 7| 7| 7| 7| 7| 7| 7| 6| 7| 6| 7| 7| 7| 6| 7| 7| 7| 7| 7| 7|            |
                             DAY ON TEST   | 0| 3| 6| 3| 1| 3| 3| 3| 3| 3| 3| 2| 5| 3| 0| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3|            |
                                           | 7| 3| 6| 3| 5| 3| 3| 6| 6| 6| 6| 4| 2| 7| 6| 7| 7| 7| 5| 7| 8| 8| 8| 8| 8|            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     O      |
   FISCHER 344 RATS FEMALE                 | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 1| 1| 1| 1| 1|     T      |
                               ANIMAL ID   | 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 0| 0| 0| 0| 0|     A      |
    0 PPM                                  | 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 8| 8| 8| 8| 8| 9| 9| 9| 9| 9| 0| 0| 0| 0| 0|     L      |
    10-0                                   | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|            |
 __________________________________________________________________________________________________________________________________ 
 INTEGUMENTARY SYSTEM - cont               |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Mammary Gland                           | +     +     +        +           +  +     +           +  +               |  16        |
      Carcinoma                            |                                                                          |          1 |
      Fibroadenoma                         |                      X           X                       X               |          7 |
                                            __________________________________________________________________________|____________|
   Skin                                    | +     +     +                    +  +     +           +                  |  11        |
      Subcutaneous Tissue, Fibroma         |                                                                          |          1 |
 _____________________________________________________________________________________________________________________|            |
 MUSCULOSKELETAL SYSTEM                    |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Bone                                    | +     +     +                    +  +     +           +                  |  11        |
 _____________________________________________________________________________________________________________________|            |
 NERVOUS SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Brain                                   | +     +     +                    +  +     +           +                  |  11        |
                                            __________________________________________________________________________|____________|
   Spinal Cord                             |                                     +                                    |   2        |
 _____________________________________________________________________________________________________________________|            |
 RESPIRATORY SYSTEM                        |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Lung                                    | +     +     +                    +  +     +           +                  |  11        |
      Adenocarcinoma, Metastatic, Uterus   |                                           X                              |          1 |
      Leukemia Mononuclear                 |             X                                         X                  |          3 |
                                            __________________________________________________________________________|____________|
   Nose                                    | +     +     +                    +  +     +           +                  |  11        |
                                            __________________________________________________________________________|____________|
   Trachea                                 | +     +     +                    +  +     +           +                  |  11        |
 _____________________________________________________________________________________________________________________|            |
 SPECIAL SENSES SYSTEM                     |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Eye                                     |                                           +              +               |   3        |
 _____________________________________________________________________________________________________________________|            |
 URINARY SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Kidney                                  | +     +     +                    +  +     +           +                  |  11        |
      Leukemia Mononuclear                 |             X                                         X                  |          3 |
                                            __________________________________________________________________________|____________|
   Urinary Bladder                         | +     +     +                    +  +     +           +                  |  11        |
 __________________________________________________________________________________________________________________________________ 
 SYSTEMIC LESIONS                          |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Multiple Organs                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 |    X        X  X                                      X              X  X|         13 |
 __________________________________________________________________________________________________________________________________ 
                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  
                                                             Page  13                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 7| 7| 7| 7| 7| 6| 7| 7| 7| 7| 7| 7| 7| 7| 7| 4| 7| 7| 7| 6| 5| 7| 6| 7| 7|             
                             DAY ON TEST   | 2| 2| 2| 2| 2| 1| 3| 3| 3| 3| 3| 3| 1| 3| 3| 8| 3| 3| 3| 3| 9| 2| 8| 3| 3|             
                                           | 9| 9| 9| 9| 9| 5| 0| 0| 0| 0| 0| 1| 9| 1| 1| 7| 1| 1| 1| 9| 2| 7| 4| 2| 2|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   FISCHER 344 RATS FEMALE                 | 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1|             
                               ANIMAL ID   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
    3 PPM                                  | 1| 1| 1| 1| 1| 2| 2| 2| 2| 2| 3| 3| 3| 3| 3| 4| 4| 4| 4| 4| 5| 5| 5| 5| 5|             
    1-1                                    | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|             
 _____________________________________________________________________________________________________________________|             
 ALIMENTARY SYSTEM                         |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Esophagus                               |                +                    +        +           +  +  +  +      |             
                                            __________________________________________________________________________|             
   Intestine Large                         |                +     +              +        +           +  +  +  +      |             
                                            __________________________________________________________________________|             
   Intestine Large, Cecum                  |                +                    +        +           +  +  +  +      |             
                                            __________________________________________________________________________|             
   Intestine Large, Colon                  |                +     +              +        +           +  +  +  +      |             
                                            __________________________________________________________________________|             
   Intestine Large, Rectum                 |                +                    +        +           +  +  +  +      |             
                                            __________________________________________________________________________|             
   Intestine Small                         |                +                    +        +           +  +  +  +      |             
                                            __________________________________________________________________________|             
   Intestine Small, Duodenum               |                +                    +        +           +  +  +  +      |             
                                            __________________________________________________________________________|             
   Intestine Small, Ileum                  |                +                    +        M           +  +  +  +      |             
                                            __________________________________________________________________________|             
   Intestine Small, Jejunum                |                +                    +        +           +  +  +  +      |             
                                            __________________________________________________________________________|             
   Liver                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Hepatocellular Adenoma               |                                     X                                    |             
      Hepatocellular Adenoma, Multiple     |             X                                                            |             
      Leukemia Mononuclear                 | X           X                       X           X        X  X  X        X|             
      Lymphoma Malignant Lymphocytic       |                                  X                                       |             
                                            __________________________________________________________________________|             
   Mesentery                               |                         +                                                |             
                                            __________________________________________________________________________|             
   Pancreas                                |                +                    +        +           +  +  +  +      |             
      Leukemia Mononuclear                 |                                                             X            |             
                                            __________________________________________________________________________|             
   Salivary Glands                         |                +                    +        +           +  +  M  +      |             
                                            __________________________________________________________________________|             
   Stomach                                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Stomach, Forestomach                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Stomach, Glandular                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Tongue                                  |             +                                                            |             
      Squamous Cell Papilloma              |             X                                                            |             
 _____________________________________________________________________________________________________________________|             
 CARDIOVASCULAR SYSTEM                     |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Heart                                   |    +           +                    +        +           +  +  +  +      |             
 _____________________________________________________________________________________________________________________|             
 ENDOCRINE SYSTEM                          |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Adrenal Gland                           |       +        +                    +        +           +  +  +  +      |             
                                            __________________________________________________________________________|             
   Adrenal Gland, Cortex                   |       +        +                    +        +           +  +  +  +      |             
      Leukemia Mononuclear                 |                                     X                       X            |             
                                            __________________________________________________________________________|             
   Adrenal Gland, Medulla                  |       +        +                    +        +           +  +  +  +      |             
      Leukemia Mononuclear                 |                                     X                       X            |             
      Pheochromocytoma Malignant           |       X                                                                  |             
      Pheochromocytoma Benign              |                                                                X         |             
                                            __________________________________________________________________________|             
   Islets, Pancreatic                      |                +                    +        +           +  +  +  +      |             
                                            __________________________________________________________________________|             
   Parathyroid Gland                       |                +                    +        +           +  +  +  +      |             
                                            __________________________________________________________________________|             
   Pituitary Gland                         |             +  +           +        +        +  +        +  +  +  +  +  +|             
      Pars Distalis, Adenoma               |             X  X           X        X        X  X              X     X  X|             
      Pars Distalis, Leukemia Mononuclear  |                                     X                                    |             
                                            __________________________________________________________________________|             
   Thyroid Gland                           |    +           +                    +        +           +  +  +  +     +|             
      C-Cell, Adenoma                      |    X                                                           X         |             
      C-Cell, Carcinoma                    |                                                                         X|             
 _____________________________________________________________________________________________________________________|             
                                                             Page  14                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 7| 7| 7| 7| 7| 6| 7| 7| 7| 7| 7| 7| 7| 7| 7| 4| 7| 7| 7| 6| 5| 7| 6| 7| 7|             
                             DAY ON TEST   | 2| 2| 2| 2| 2| 1| 3| 3| 3| 3| 3| 3| 1| 3| 3| 8| 3| 3| 3| 3| 9| 2| 8| 3| 3|             
                                           | 9| 9| 9| 9| 9| 5| 0| 0| 0| 0| 0| 1| 9| 1| 1| 7| 1| 1| 1| 9| 2| 7| 4| 2| 2|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   FISCHER 344 RATS FEMALE                 | 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1|             
                               ANIMAL ID   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
    3 PPM                                  | 1| 1| 1| 1| 1| 2| 2| 2| 2| 2| 3| 3| 3| 3| 3| 4| 4| 4| 4| 4| 5| 5| 5| 5| 5|             
    1-1                                    | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|             
 _____________________________________________________________________________________________________________________|             
 GENERAL BODY SYSTEM                       |                                                                          |             
                                           |                                                                          |             
    None                                   |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 GENITAL SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Clitoral Gland                          |                +                    +        +           +  +  +  +      |             
                                            __________________________________________________________________________|             
   Ovary                                   |          +     +     +  +  +  +     +        +           +  +  +  +      |             
      Granulosa-Theca Tumor Malignant      |                            X                                             |             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Uterus                                  |          +     +                    +        +  +     +  +  +  +  +      |             
      Adenocarcinoma                       |                                                       X           X      |             
      Leukemia Mononuclear                 |                                                                          |             
      Polyp Stromal                        |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 HEMATOPOIETIC SYSTEM                      |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Bone Marrow                             |                +                    +        +           +  +  +  +      |             
      Femoral, Leukemia Mononuclear        |                                     X                       X            |             
                                            __________________________________________________________________________|             
   Lymph Node                              |                +                 +  +        +           +  +  M  +      |             
      Mandibular, Leukemia Mononuclear     |                                     X                    X  X            |             
      Mediastinal, Leukemia Mononuclear    |                                     X                    X  X            |             
      Pancreatic, Leukemia Mononuclear     |                                                                          |             
                                            __________________________________________________________________________|             
   Lymph Node, Mesenteric                  |                                  +  +                                    |             
      Leukemia Mononuclear                 |                                     X                                    |             
      Lymphoma Malignant Lymphocytic       |                                  X                                       |             
                                            __________________________________________________________________________|             
   Spleen                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X           X                       X           X        X  X  X        X|             
      Lymphoma Malignant Lymphocytic       |                                  X                                       |             
                                            __________________________________________________________________________|             
   Thymus                                  |                +                    +        +           +  +  +  +      |             
      Leukemia Mononuclear                 |                                     X                                    |             
 _____________________________________________________________________________________________________________________|             
 INTEGUMENTARY SYSTEM                      |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Mammary Gland                           |                +        +           M        +           +  +  +  +  +   |             
      Fibroadenoma                         |                         X                                            X   |             
      Fibroadenoma, Multiple               |                                                                          |             
                                            __________________________________________________________________________|             
   Skin                                    |                +                    +        +           +  +  +  +      |             
      Subcutaneous Tissue, Fibrosarcoma    |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 MUSCULOSKELETAL SYSTEM                    |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Bone                                    |                +                    +        +           +  +  +  +      |             
 _____________________________________________________________________________________________________________________|             
 NERVOUS SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Brain                                   |                +                    +        +           +  +  +  +      |             
 _____________________________________________________________________________________________________________________|             
 RESPIRATORY SYSTEM                        |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Lung                                    |                +                    +           +        +  +  +  +      |             
      Adenocarcinoma, Metastatic, Uterus   |                                                                   X      |             
 _____________________________________________________________________________________________________________________|             
                                                             Page  15                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 7| 7| 7| 7| 7| 6| 7| 7| 7| 7| 7| 7| 7| 7| 7| 4| 7| 7| 7| 6| 5| 7| 6| 7| 7|             
                             DAY ON TEST   | 2| 2| 2| 2| 2| 1| 3| 3| 3| 3| 3| 3| 1| 3| 3| 8| 3| 3| 3| 3| 9| 2| 8| 3| 3|             
                                           | 9| 9| 9| 9| 9| 5| 0| 0| 0| 0| 0| 1| 9| 1| 1| 7| 1| 1| 1| 9| 2| 7| 4| 2| 2|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   FISCHER 344 RATS FEMALE                 | 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1|             
                               ANIMAL ID   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
    3 PPM                                  | 1| 1| 1| 1| 1| 2| 2| 2| 2| 2| 3| 3| 3| 3| 3| 4| 4| 4| 4| 4| 5| 5| 5| 5| 5|             
    1-1                                    | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|             
 _____________________________________________________________________________________________________________________|             
 RESPIRATORY SYSTEM - cont                 |                                                                          |             
                                           |                                                                          |             
      Leukemia Mononuclear                 |                                     X                    X  X  X         |             
                                            __________________________________________________________________________|             
   Nose                                    |                +                    +        +           +  +  +  +      |             
                                            __________________________________________________________________________|             
   Trachea                                 |                +                    +        +           +  +  +  +      |             
 _____________________________________________________________________________________________________________________|             
 SPECIAL SENSES SYSTEM                     |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Eye                                     |                                                 +                        |             
                                            __________________________________________________________________________|             
   Harderian Gland                         |                                                 +                        |             
 _____________________________________________________________________________________________________________________|             
 URINARY SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Kidney                                  |                +                    +        +           +  +  +  +      |             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Urinary Bladder                         |                +                    +        +           +  +  +  +      |             
 _____________________________________________________________________________________________________________________|             
 SYSTEMIC LESIONS                          |                                                                          |             
                                            __________________________________________________________________________|             
   Multiple Organs                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X           X                       X           X        X  X  X        X|             
      Lymphoma Malignant Lymphocytic       |                                  X                                       |             
 _____________________________________________________________________________________________________________________|             
                                                             Page  16                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 1|            |
                             DAY ON TEST   | 2| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 0| 3| 3| 8|            |
                                           | 0| 2| 2| 3| 3| 3| 3| 3| 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 8| 8| 8| 6| 4| 8| 7|            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     O      |
   FISCHER 344 RATS FEMALE                 | 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1|     T      |
                               ANIMAL ID   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 1| 1| 1| 1| 1|     A      |
    3 PPM                                  | 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 8| 8| 8| 8| 8| 9| 9| 9| 9| 9| 0| 0| 0| 0| 0|     L      |
    1-1                                    | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|            |
 __________________________________________________________________________________________________________________________________ 
 ALIMENTARY SYSTEM                         |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Esophagus                               | +                                                              +  +     +|  11        |
                                            __________________________________________________________________________|____________|
   Intestine Large                         | +                                                              +  +     +|  12        |
                                            __________________________________________________________________________|____________|
   Intestine Large, Cecum                  | +                                                              +  +     +|  11        |
                                            __________________________________________________________________________|____________|
   Intestine Large, Colon                  | +                                                              +  +     +|  12        |
                                            __________________________________________________________________________|____________|
   Intestine Large, Rectum                 | +                                                              +  +     +|  11        |
                                            __________________________________________________________________________|____________|
   Intestine Small                         | +                                                              +  +     +|  11        |
                                            __________________________________________________________________________|____________|
   Intestine Small, Duodenum               | +                                                              +  +     +|  11        |
                                            __________________________________________________________________________|____________|
   Intestine Small, Ileum                  | +                                                              +  +     +|  10        |
                                            __________________________________________________________________________|____________|
   Intestine Small, Jejunum                | +                                                              +  +     +|  11        |
                                            __________________________________________________________________________|____________|
   Liver                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Hepatocellular Adenoma               |                X                                                         |          2 |
      Hepatocellular Adenoma, Multiple     |                                                                          |          1 |
      Leukemia Mononuclear                 | X     X        X  X           X  X     X     X        X        X  X  X   |         20 |
      Lymphoma Malignant Lymphocytic       |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Mesentery                               |                                                                          |   1        |
                                            __________________________________________________________________________|____________|
   Pancreas                                | +                                                              +  +     +|  11        |
      Leukemia Mononuclear                 |                                                                   X      |          2 |
                                            __________________________________________________________________________|____________|
   Salivary Glands                         | +                                                              +  +     +|  10        |
                                            __________________________________________________________________________|____________|
   Stomach                                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Stomach, Forestomach                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Stomach, Glandular                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 |                                                                   X      |          1 |
                                            __________________________________________________________________________|____________|
   Tongue                                  |                                                                          |   1        |
      Squamous Cell Papilloma              |                                                                          |          1 |
 _____________________________________________________________________________________________________________________|            |
 CARDIOVASCULAR SYSTEM                     |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Heart                                   | +                                                              +  +     +|  12        |
 _____________________________________________________________________________________________________________________|            |
 ENDOCRINE SYSTEM                          |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Adrenal Gland                           | +                                                              +  +     +|  12        |
                                            __________________________________________________________________________|____________|
   Adrenal Gland, Cortex                   | +                                                              +  +     +|  12        |
      Leukemia Mononuclear                 |                                                                   X      |          3 |
                                            __________________________________________________________________________|____________|
   Adrenal Gland, Medulla                  | +                                                              +  +     +|  12        |
      Leukemia Mononuclear                 |                                                                   X      |          3 |
      Pheochromocytoma Malignant           |                                                                          |          1 |
      Pheochromocytoma Benign              |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Islets, Pancreatic                      | +                                                              +  +     +|  11        |
                                            __________________________________________________________________________|____________|
   Parathyroid Gland                       | +                                                              +  +     +|  11        |
                                            __________________________________________________________________________|____________|
   Pituitary Gland                         | +        +        +     +  +     +           +  +  +  +  +     +  +  +  +|  27        |
 __________________________________________________________________________________________________________________________________ 
                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  
                                                             Page  17                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 1|            |
                             DAY ON TEST   | 2| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 0| 3| 3| 8|            |
                                           | 0| 2| 2| 3| 3| 3| 3| 3| 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 8| 8| 8| 6| 4| 8| 7|            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     O      |
   FISCHER 344 RATS FEMALE                 | 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1|     T      |
                               ANIMAL ID   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 1| 1| 1| 1| 1|     A      |
    3 PPM                                  | 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 8| 8| 8| 8| 8| 9| 9| 9| 9| 9| 0| 0| 0| 0| 0|     L      |
    1-1                                    | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|            |
 __________________________________________________________________________________________________________________________________ 
 ENDOCRINE SYSTEM - cont                   |                                                                          |            |
                                           |                                                                          |            |
      Pars Distalis, Adenoma               |                   X     X  X     X           X  X        X     X  X  X   |         19 |
      Pars Distalis, Leukemia Mononuclear  |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Thyroid Gland                           | +     +                                               +        +  +     +|  15        |
      C-Cell, Adenoma                      | X                                                              X         |          4 |
      C-Cell, Carcinoma                    |       X                                                                  |          2 |
 _____________________________________________________________________________________________________________________|            |
 GENERAL BODY SYSTEM                       |                                                                          |            |
                                           |                                                                          |            |
    None                                   |                                                                          |            |
 _____________________________________________________________________________________________________________________|            |
 GENITAL SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Clitoral Gland                          | +                                +                             +  +     +|  12        |
                                            __________________________________________________________________________|____________|
   Ovary                                   | +        +  +        +                                         +  +     +|  19        |
      Granulosa-Theca Tumor Malignant      |                                                                          |          1 |
      Leukemia Mononuclear                 |                                                                   X      |          1 |
                                            __________________________________________________________________________|____________|
   Uterus                                  | +     +        +  +                                         +  +  +     +|  18        |
      Adenocarcinoma                       |                                                                          |          2 |
      Leukemia Mononuclear                 |                                                                   X      |          1 |
      Polyp Stromal                        |       X        X                                                         |          2 |
 _____________________________________________________________________________________________________________________|            |
 HEMATOPOIETIC SYSTEM                      |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Bone Marrow                             | +                                                              +  +     +|  11        |
      Femoral, Leukemia Mononuclear        |                                                                   X      |          3 |
                                            __________________________________________________________________________|____________|
   Lymph Node                              | +                                                              +  +     +|  11        |
      Mandibular, Leukemia Mononuclear     | X                                                              X  X      |          6 |
      Mediastinal, Leukemia Mononuclear    |                                                                   X      |          4 |
      Pancreatic, Leukemia Mononuclear     |                                                                   X      |          1 |
                                            __________________________________________________________________________|____________|
   Lymph Node, Mesenteric                  |                                                                   +      |   3        |
      Leukemia Mononuclear                 |                                                                   X      |          2 |
      Lymphoma Malignant Lymphocytic       |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Spleen                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 | X     X        X  X           X  X     X     X        X        X  X  X   |         20 |
      Lymphoma Malignant Lymphocytic       |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Thymus                                  | +                                                              +  +     +|  11        |
      Leukemia Mononuclear                 |                                                                X  X      |          3 |
 _____________________________________________________________________________________________________________________|            |
 INTEGUMENTARY SYSTEM                      |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Mammary Gland                           | +                    +                                         +  +     +|  13        |
      Fibroadenoma                         |                                                                          |          2 |
      Fibroadenoma, Multiple               |                      X                                                   |          1 |
 __________________________________________________________________________________________________________________________________ 
                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  
                                                             Page  18                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 1|            |
                             DAY ON TEST   | 2| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 0| 3| 3| 8|            |
                                           | 0| 2| 2| 3| 3| 3| 3| 3| 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 8| 8| 8| 6| 4| 8| 7|            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     O      |
   FISCHER 344 RATS FEMALE                 | 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1|     T      |
                               ANIMAL ID   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 1| 1| 1| 1| 1|     A      |
    3 PPM                                  | 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 8| 8| 8| 8| 8| 9| 9| 9| 9| 9| 0| 0| 0| 0| 0|     L      |
    1-1                                    | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|            |
 __________________________________________________________________________________________________________________________________ 
 INTEGUMENTARY SYSTEM - cont               |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Skin                                    | +                                            +                 +  +     +|  12        |
      Subcutaneous Tissue, Fibrosarcoma    |                                              X                           |          1 |
 _____________________________________________________________________________________________________________________|            |
 MUSCULOSKELETAL SYSTEM                    |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Bone                                    | +                                                              +  +     +|  11        |
 _____________________________________________________________________________________________________________________|            |
 NERVOUS SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Brain                                   | +                                                              +  +     +|  11        |
 _____________________________________________________________________________________________________________________|            |
 RESPIRATORY SYSTEM                        |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Lung                                    | +                                                              +  +     +|  11        |
      Adenocarcinoma, Metastatic, Uterus   |                                                                          |          1 |
      Leukemia Mononuclear                 | X                                                              X  X      |          7 |
                                            __________________________________________________________________________|____________|
   Nose                                    | +                                                              +  +     +|  11        |
                                            __________________________________________________________________________|____________|
   Trachea                                 | +                                                              +  +     +|  11        |
 _____________________________________________________________________________________________________________________|            |
 SPECIAL SENSES SYSTEM                     |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Eye                                     |                                        +                                 |   2        |
                                            __________________________________________________________________________|____________|
   Harderian Gland                         |                                                                          |   1        |
 _____________________________________________________________________________________________________________________|            |
 URINARY SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Kidney                                  | +                                                              +  +     +|  11        |
      Leukemia Mononuclear                 |                                                                   X      |          1 |
                                            __________________________________________________________________________|____________|
   Urinary Bladder                         | +                                                              +  +     +|  11        |
 __________________________________________________________________________________________________________________________________ 
 SYSTEMIC LESIONS                          |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Multiple Organs                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 | X     X        X  X           X  X     X     X        X        X  X  X   |         20 |
      Lymphoma Malignant Lymphocytic       |                                                                          |          1 |
 __________________________________________________________________________________________________________________________________ 
                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  
                                                             Page  19                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 5| 7| 7| 7| 7| 7| 7| 7| 7| 7| 6| 7| 5| 7| 7| 7| 7| 7| 7| 6| 7| 7| 7| 7| 7|             
                             DAY ON TEST   | 8| 2| 2| 0| 2| 2| 3| 3| 3| 3| 1| 3| 7| 3| 3| 3| 3| 3| 3| 9| 3| 3| 2| 3| 3|             
                                           | 8| 9| 9| 5| 4| 9| 0| 0| 0| 0| 5| 1| 6| 1| 1| 1| 1| 2| 2| 1| 2| 2| 0| 2| 3|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   FISCHER 344 RATS FEMALE                 | 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1|             
                               ANIMAL ID   | 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1|             
    10 PPM                                 | 1| 1| 1| 1| 1| 2| 2| 2| 2| 2| 3| 3| 3| 3| 3| 4| 4| 4| 4| 4| 5| 5| 5| 5| 5|             
     0-3                                   | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|             
 _____________________________________________________________________________________________________________________|             
 ALIMENTARY SYSTEM                         |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Esophagus                               | +        +  +                 +     +                    +        +      |             
                                            __________________________________________________________________________|             
   Intestine Large                         | +        +  +                 +     +                    A        +      |             
                                            __________________________________________________________________________|             
   Intestine Large, Cecum                  | +        +  +                 +     +                    A        +      |             
                                            __________________________________________________________________________|             
   Intestine Large, Colon                  | +        +  +                 +     +                    A        +      |             
                                            __________________________________________________________________________|             
   Intestine Large, Rectum                 | +        +  +                 +     +                    A        +      |             
                                            __________________________________________________________________________|             
   Intestine Small                         | +        +  +                 +     +                    A        +      |             
                                            __________________________________________________________________________|             
   Intestine Small, Duodenum               | +        +  +                 +     +                    A        +      |             
                                            __________________________________________________________________________|             
   Intestine Small, Ileum                  | +        +  +                 +     +                    A        +      |             
                                            __________________________________________________________________________|             
   Intestine Small, Jejunum                | +        +  +                 +     +                    A        +      |             
                                            __________________________________________________________________________|             
   Liver                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Hepatocellular Carcinoma             |                                                                          |             
      Hepatocellular Adenoma               |                                                    X           X        X|             
      Hepatocellular Adenoma, Multiple     |                X                 X                                       |             
      Leukemia Mononuclear                 | X     X  X              X  X     X  X     X     X  X     X     X         |             
                                            __________________________________________________________________________|             
   Mesentery                               |                                                                          |             
                                            __________________________________________________________________________|             
   Pancreas                                | +        +  +                 +     +                    M        +      |             
                                            __________________________________________________________________________|             
   Salivary Glands                         | +        +  +                 +     +                    +        +      |             
                                            __________________________________________________________________________|             
   Stomach                                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Stomach, Forestomach                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Squamous Cell Carcinoma              |                                                    X                     |             
                                            __________________________________________________________________________|             
   Stomach, Glandular                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Sarcoma                              |                                                    X                     |             
                                            __________________________________________________________________________|             
   Tongue                                  |          +                                                               |             
      Squamous Cell Carcinoma              |          X                                                               |             
 _____________________________________________________________________________________________________________________|             
 CARDIOVASCULAR SYSTEM                     |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Heart                                   | +        +  +                 +     +                    +        +      |             
 _____________________________________________________________________________________________________________________|             
 ENDOCRINE SYSTEM                          |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Adrenal Gland                           | +        +  +                 +     +                    A  +     +      |             
                                            __________________________________________________________________________|             
   Adrenal Gland, Cortex                   | +        +  +                 +     +                    A  +     +      |             
                                            __________________________________________________________________________|             
   Adrenal Gland, Medulla                  |          +  +                 +     +                    A  +     +      |             
                                            __________________________________________________________________________|             
   Islets, Pancreatic                      | +        +  +                 +     +                    M        +      |             
                                            __________________________________________________________________________|             
   Parathyroid Gland                       | +        +  +                 +     +                    +        +      |             
                                            __________________________________________________________________________|             
   Pituitary Gland                         | +        +  +        +  +     +     +                    +  +  +  +     +|             
      Pars Distalis, Adenoma               |          X  X        X  X     X     X                          X        X|             
      Pars Intermedia, Adenoma             |                      X                                      X            |             
                                            __________________________________________________________________________|             
   Thyroid Gland                           | +        +  +                 +     +                    A        +  +   |             
      C-Cell, Adenoma                      | X                             X                                          |             
      C-Cell, Carcinoma                    |                                                                      X   |             
 _____________________________________________________________________________________________________________________|             
 GENERAL BODY SYSTEM                       |                                                                          |             
                                           |                                                                          |             
    None                                   |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 GENITAL SYSTEM                            |                                                                          |             
 _____________________________________________________________________________________________________________________|             
                                                             Page  20                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 5| 7| 7| 7| 7| 7| 7| 7| 7| 7| 6| 7| 5| 7| 7| 7| 7| 7| 7| 6| 7| 7| 7| 7| 7|             
                             DAY ON TEST   | 8| 2| 2| 0| 2| 2| 3| 3| 3| 3| 1| 3| 7| 3| 3| 3| 3| 3| 3| 9| 3| 3| 2| 3| 3|             
                                           | 8| 9| 9| 5| 4| 9| 0| 0| 0| 0| 5| 1| 6| 1| 1| 1| 1| 2| 2| 1| 2| 2| 0| 2| 3|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   FISCHER 344 RATS FEMALE                 | 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1|             
                               ANIMAL ID   | 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1|             
    10 PPM                                 | 1| 1| 1| 1| 1| 2| 2| 2| 2| 2| 3| 3| 3| 3| 3| 4| 4| 4| 4| 4| 5| 5| 5| 5| 5|             
     0-3                                   | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|             
 _____________________________________________________________________________________________________________________|             
 GENITAL SYSTEM - cont                     |                                                                          |             
                                           |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Clitoral Gland                          | +        +  +                 +     +                    +        +      |             
      Adenoma                              |                               X                                          |             
                                            __________________________________________________________________________|             
   Ovary                                   | +        +  +  +  +           +     +                    +        +     +|             
      Periovarian Tissue, Leiomyoma        |                                                                          |             
                                            __________________________________________________________________________|             
   Uterus                                  | +        +  +  +           +  +     +                    +        +      |             
      Polyp Stromal                        |                            X                                             |             
      Sarcoma Stromal                      |                X                                                         |             
 _____________________________________________________________________________________________________________________|             
 HEMATOPOIETIC SYSTEM                      |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Bone Marrow                             | +        +  +                 +     +                    A        +      |             
      Femoral, Leukemia Mononuclear        |                                                                          |             
                                            __________________________________________________________________________|             
   Lymph Node                              | +        +  +                 +     +                    +        +      |             
      Mandibular, Leukemia Mononuclear     |                                     X                                    |             
      Mediastinal, Leukemia Mononuclear    |                                                                          |             
      Pancreatic, Leukemia Mononuclear     |                                                                          |             
                                            __________________________________________________________________________|             
   Lymph Node, Mesenteric                  |                                                                          |             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Spleen                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X     X  X              X  X     X  X     X     X  X     X     X         |             
                                            __________________________________________________________________________|             
   Thymus                                  | +        +  +                 I     M                    +        +      |             
 _____________________________________________________________________________________________________________________|             
 INTEGUMENTARY SYSTEM                      |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Mammary Gland                           | +        +  +        +  +     +  +  +                    +        +     +|             
      Fibroadenoma                         |                      X  X        X                                      X|             
      Fibroadenoma, Multiple               |                                                                          |             
                                            __________________________________________________________________________|             
   Skin                                    | +        +  +                 +     +                    A        +      |             
 _____________________________________________________________________________________________________________________|             
 MUSCULOSKELETAL SYSTEM                    |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Bone                                    | +        +  +                 +     +                    +        +      |             
 _____________________________________________________________________________________________________________________|             
 NERVOUS SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Brain                                   | +        +  +                 +     +                    +        +      |             
      Astrocytoma Malignant                |                                                                          |             
                                            __________________________________________________________________________|             
   Spinal Cord                             |                                                                   +      |             
 _____________________________________________________________________________________________________________________|             
 RESPIRATORY SYSTEM                        |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Lung                                    | +        +  +                 +     +                    +        +      |             
      Leukemia Mononuclear                 | X                                   X                                    |             
                                            __________________________________________________________________________|             
   Nose                                    | +        +  +                 +     +                    A        +      |             
                                            __________________________________________________________________________|             
   Trachea                                 | +        +  +                 +     +                    +        +      |             
 _____________________________________________________________________________________________________________________|             
 SPECIAL SENSES SYSTEM                     |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Eye                                     |                                        +                                 |             
 _____________________________________________________________________________________________________________________|             
                                                             Page  21                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 5| 7| 7| 7| 7| 7| 7| 7| 7| 7| 6| 7| 5| 7| 7| 7| 7| 7| 7| 6| 7| 7| 7| 7| 7|             
                             DAY ON TEST   | 8| 2| 2| 0| 2| 2| 3| 3| 3| 3| 1| 3| 7| 3| 3| 3| 3| 3| 3| 9| 3| 3| 2| 3| 3|             
                                           | 8| 9| 9| 5| 4| 9| 0| 0| 0| 0| 5| 1| 6| 1| 1| 1| 1| 2| 2| 1| 2| 2| 0| 2| 3|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   FISCHER 344 RATS FEMALE                 | 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1|             
                               ANIMAL ID   | 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1|             
    10 PPM                                 | 1| 1| 1| 1| 1| 2| 2| 2| 2| 2| 3| 3| 3| 3| 3| 4| 4| 4| 4| 4| 5| 5| 5| 5| 5|             
     0-3                                   | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|             
 _____________________________________________________________________________________________________________________|             
 SPECIAL SENSES SYSTEM - cont              |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Zymbal's Gland                          |                                                                   +      |             
      Carcinoma                            |                                                                   X      |             
 _____________________________________________________________________________________________________________________|             
 URINARY SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Kidney                                  | +        +  +                 +     +                    +        +      |             
      Leukemia Mononuclear                 |                                     X                                    |             
                                            __________________________________________________________________________|             
   Urinary Bladder                         | +        +  +                 +     +                    +        +      |             
 _____________________________________________________________________________________________________________________|             
 SYSTEMIC LESIONS                          |                                                                          |             
                                            __________________________________________________________________________|             
   Multiple Organs                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X     X  X              X  X     X  X     X     X  X     X     X         |             
 _____________________________________________________________________________________________________________________|             
                                                             Page  22                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 6| 7| 7| 7| 7| 7| 7| 7| 7| 7| 5| 7| 7| 7| 7| 7| 4| 5| 7| 6| 7| 7| 7| 7| 7|            |
                             DAY ON TEST   | 8| 3| 3| 3| 3| 3| 2| 3| 3| 3| 0| 0| 3| 3| 3| 3| 8| 6| 3| 6| 3| 3| 3| 3| 3|            |
                                           | 0| 3| 3| 3| 3| 6| 1| 6| 6| 6| 2| 9| 6| 7| 7| 7| 5| 5| 7| 1| 8| 8| 8| 8| 8|            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     O      |
   FISCHER 344 RATS FEMALE                 | 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1|     T      |
                               ANIMAL ID   | 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 2| 2| 2| 2| 2|     A      |
    10 PPM                                 | 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 8| 8| 8| 8| 8| 9| 9| 9| 9| 9| 0| 0| 0| 0| 0|     L      |
     0-3                                   | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|            |
 __________________________________________________________________________________________________________________________________ 
 ALIMENTARY SYSTEM                         |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Esophagus                               | +                 +           +  +              +  +     +               |  14        |
                                            __________________________________________________________________________|____________|
   Intestine Large                         | +                 +           +  +              +  +     +               |  13        |
                                            __________________________________________________________________________|____________|
   Intestine Large, Cecum                  | +                 +           +  +              +  +     +               |  13        |
                                            __________________________________________________________________________|____________|
   Intestine Large, Colon                  | +                 +           +  +              +  +     +               |  13        |
                                            __________________________________________________________________________|____________|
   Intestine Large, Rectum                 | +                 +           +  +              +  +     +               |  13        |
                                            __________________________________________________________________________|____________|
   Intestine Small                         | +                 +           +  +              +  +     +               |  13        |
                                            __________________________________________________________________________|____________|
   Intestine Small, Duodenum               | +                 +           +  +              +  +     +               |  13        |
                                            __________________________________________________________________________|____________|
   Intestine Small, Ileum                  | +                 +           +  +              +  +     +               |  13        |
                                            __________________________________________________________________________|____________|
   Intestine Small, Jejunum                | +                 +           +  +              +  M     +               |  12        |
                                            __________________________________________________________________________|____________|
   Liver                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Hepatocellular Carcinoma             |                                                       X                 X|          2 |
      Hepatocellular Adenoma               |                                     X     X        X                     |          6 |
      Hepatocellular Adenoma, Multiple     |       X                                                        X         |          4 |
      Leukemia Mononuclear                 | X     X           X  X              X           X  X     X     X         |         21 |
                                            __________________________________________________________________________|____________|
   Mesentery                               |                                     +                                    |   1        |
                                            __________________________________________________________________________|____________|
   Pancreas                                | +                 +           +  +              +  +     +               |  13        |
                                            __________________________________________________________________________|____________|
   Salivary Glands                         | +                 +           +  +              +  +     +               |  14        |
                                            __________________________________________________________________________|____________|
   Stomach                                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Stomach, Forestomach                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Squamous Cell Carcinoma              |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Stomach, Glandular                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Sarcoma                              |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Tongue                                  |                                                                          |   1        |
      Squamous Cell Carcinoma              |                                                                          |          1 |
 _____________________________________________________________________________________________________________________|            |
 CARDIOVASCULAR SYSTEM                     |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Heart                                   | +                 +           +  +              +  +     +               |  14        |
 _____________________________________________________________________________________________________________________|            |
 ENDOCRINE SYSTEM                          |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Adrenal Gland                           | +                 +           +  +              +  +     +               |  14        |
                                            __________________________________________________________________________|____________|
   Adrenal Gland, Cortex                   | +                 +           +  +              +  +     +               |  14        |
                                            __________________________________________________________________________|____________|
   Adrenal Gland, Medulla                  | +                 +           +  +              +  +     +               |  13        |
                                            __________________________________________________________________________|____________|
   Islets, Pancreatic                      | +                 +           +  +              +  +     +               |  13        |
                                            __________________________________________________________________________|____________|
   Parathyroid Gland                       | +                 +           +  +              +  +     +               |  14        |
                                            __________________________________________________________________________|____________|
   Pituitary Gland                         | +           +     +  +     +  +  +  +        +  +  +  +  +  +  +  +  +   |  29        |
      Pars Distalis, Adenoma               |             X     X        X     X  X        X              X  X  X  X   |         18 |
      Pars Intermedia, Adenoma             |                                                                          |          2 |
                                            __________________________________________________________________________|____________|
   Thyroid Gland                           | +                 +           +  +              +  +     +               |  14        |
      C-Cell, Adenoma                      |                                                          X               |          3 |
 __________________________________________________________________________________________________________________________________ 
                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  
                                                             Page  23                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 6| 7| 7| 7| 7| 7| 7| 7| 7| 7| 5| 7| 7| 7| 7| 7| 4| 5| 7| 6| 7| 7| 7| 7| 7|            |
                             DAY ON TEST   | 8| 3| 3| 3| 3| 3| 2| 3| 3| 3| 0| 0| 3| 3| 3| 3| 8| 6| 3| 6| 3| 3| 3| 3| 3|            |
                                           | 0| 3| 3| 3| 3| 6| 1| 6| 6| 6| 2| 9| 6| 7| 7| 7| 5| 5| 7| 1| 8| 8| 8| 8| 8|            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     O      |
   FISCHER 344 RATS FEMALE                 | 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1|     T      |
                               ANIMAL ID   | 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 2| 2| 2| 2| 2|     A      |
    10 PPM                                 | 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 8| 8| 8| 8| 8| 9| 9| 9| 9| 9| 0| 0| 0| 0| 0|     L      |
     0-3                                   | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|            |
 __________________________________________________________________________________________________________________________________ 
 ENDOCRINE SYSTEM - cont                   |                                                                          |            |
                                           |                                                                          |            |
      C-Cell, Carcinoma                    |                                                                          |          1 |
 _____________________________________________________________________________________________________________________|            |
 GENERAL BODY SYSTEM                       |                                                                          |            |
                                           |                                                                          |            |
    None                                   |                                                                          |            |
 _____________________________________________________________________________________________________________________|            |
 GENITAL SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Clitoral Gland                          | +  +              +     +     +  +              +  +     +               |  16        |
      Adenoma                              |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Ovary                                   | +  +              +           +  +  +     +     +  +  +  +              +|  22        |
      Periovarian Tissue, Leiomyoma        |                                                                         X|          1 |
                                            __________________________________________________________________________|____________|
   Uterus                                  | +        +        +  +        +  +              +  +     +               |  18        |
      Polyp Stromal                        |          X           X                                                   |          3 |
      Sarcoma Stromal                      |                                                                          |          1 |
 _____________________________________________________________________________________________________________________|            |
 HEMATOPOIETIC SYSTEM                      |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Bone Marrow                             | +                 +           +  +              +  +     +               |  13        |
      Femoral, Leukemia Mononuclear        |                                                 X                        |          1 |
                                            __________________________________________________________________________|____________|
   Lymph Node                              | +                 +           +  +              +  +     +               |  14        |
      Mandibular, Leukemia Mononuclear     | X                 X                             X  X     X               |          6 |
      Mediastinal, Leukemia Mononuclear    | X                                                                        |          1 |
      Pancreatic, Leukemia Mononuclear     |                                                 X                        |          1 |
                                            __________________________________________________________________________|____________|
   Lymph Node, Mesenteric                  | +                                                                        |   1        |
      Leukemia Mononuclear                 | X                                                                        |          1 |
                                            __________________________________________________________________________|____________|
   Spleen                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 | X     X  X        X  X              X           X  X     X     X         |         22 |
                                            __________________________________________________________________________|____________|
   Thymus                                  | +                 +           M  +              +  +     +               |  11        |
 _____________________________________________________________________________________________________________________|            |
 INTEGUMENTARY SYSTEM                      |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Mammary Gland                           | +              +  +           +  M        +     +  +     +     +        +|  21        |
      Fibroadenoma                         | X              X  X                       X              X              X|         10 |
      Fibroadenoma, Multiple               |                                                                X         |          1 |
                                            __________________________________________________________________________|____________|
   Skin                                    | +                 +           +  +              +  +     +               |  13        |
 _____________________________________________________________________________________________________________________|            |
 MUSCULOSKELETAL SYSTEM                    |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Bone                                    | +                 +           +  +              +  +     +               |  14        |
 _____________________________________________________________________________________________________________________|            |
 NERVOUS SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Brain                                   | +                 +           +  +              +  +     +               |  14        |
      Astrocytoma Malignant                |                               X                                          |          1 |
 __________________________________________________________________________________________________________________________________ 
                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  
                                                             Page  24                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 6| 7| 7| 7| 7| 7| 7| 7| 7| 7| 5| 7| 7| 7| 7| 7| 4| 5| 7| 6| 7| 7| 7| 7| 7|            |
                             DAY ON TEST   | 8| 3| 3| 3| 3| 3| 2| 3| 3| 3| 0| 0| 3| 3| 3| 3| 8| 6| 3| 6| 3| 3| 3| 3| 3|            |
                                           | 0| 3| 3| 3| 3| 6| 1| 6| 6| 6| 2| 9| 6| 7| 7| 7| 5| 5| 7| 1| 8| 8| 8| 8| 8|            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     O      |
   FISCHER 344 RATS FEMALE                 | 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1|     T      |
                               ANIMAL ID   | 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 2| 2| 2| 2| 2|     A      |
    10 PPM                                 | 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 8| 8| 8| 8| 8| 9| 9| 9| 9| 9| 0| 0| 0| 0| 0|     L      |
     0-3                                   | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|            |
 __________________________________________________________________________________________________________________________________ 
 NERVOUS SYSTEM - cont                     |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Spinal Cord                             |                                                                          |   1        |
 _____________________________________________________________________________________________________________________|            |
 RESPIRATORY SYSTEM                        |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Lung                                    | +                 +           +  +              +  +     +               |  14        |
      Leukemia Mononuclear                 |                                                 X  X     X               |          5 |
                                            __________________________________________________________________________|____________|
   Nose                                    | +                 +           +  +              +  +     +               |  13        |
                                            __________________________________________________________________________|____________|
   Trachea                                 | +                 +           +  +              +  +     +               |  14        |
 _____________________________________________________________________________________________________________________|            |
 SPECIAL SENSES SYSTEM                     |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Eye                                     |             +     +                                            +         |   4        |
                                            __________________________________________________________________________|____________|
   Zymbal's Gland                          |                                                                          |   1        |
      Carcinoma                            |                                                                          |          1 |
 _____________________________________________________________________________________________________________________|            |
 URINARY SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Kidney                                  | +                 +           +  +              +  +     +               |  14        |
      Leukemia Mononuclear                 |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Urinary Bladder                         | +                 +           +  +              +  +     +               |  14        |
 __________________________________________________________________________________________________________________________________ 
 SYSTEMIC LESIONS                          |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Multiple Organs                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 | X     X  X        X  X              X           X  X     X     X         |         22 |
 __________________________________________________________________________________________________________________________________ 
                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  
                                                             Page  25                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 7| 7| 7| 7| 7| 7| 5| 7| 7| 7| 7| 7| 7| 5| 7| 7| 7| 6| 7| 7| 7| 5| 4| 7| 7|             
                             DAY ON TEST   | 2| 2| 1| 2| 2| 3| 0| 3| 3| 3| 3| 3| 3| 9| 3| 3| 3| 3| 1| 3| 3| 7| 2| 0| 3|             
                                           | 9| 9| 1| 9| 9| 0| 7| 0| 0| 0| 0| 1| 1| 1| 1| 1| 1| 9| 8| 1| 2| 4| 9| 7| 2|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   FISCHER 344 RATS FEMALE                 | 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1|             
                               ANIMAL ID   | 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2|             
    10 PPM                                 | 1| 1| 1| 1| 1| 2| 2| 2| 2| 2| 3| 3| 3| 3| 3| 4| 4| 4| 4| 4| 5| 5| 5| 5| 5|             
     3-3                                   | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|             
 _____________________________________________________________________________________________________________________|             
 ALIMENTARY SYSTEM                         |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Esophagus                               |       +           +                    +           +  +        +  +  +   |             
                                            __________________________________________________________________________|             
   Intestine Large                         |       +           +                    +           +  +        +  +  +   |             
                                            __________________________________________________________________________|             
   Intestine Large, Cecum                  |       +           +                    +           +  +        A  +  +   |             
      Leiomyosarcoma                       |                   X                                                      |             
                                            __________________________________________________________________________|             
   Intestine Large, Colon                  |       +           +                    +           +  +        +  +  +   |             
                                            __________________________________________________________________________|             
   Intestine Large, Rectum                 |       +           A                    +           +  +        A  +  +   |             
                                            __________________________________________________________________________|             
   Intestine Small                         |       +           +                    +           +  +        +  +  +   |             
                                            __________________________________________________________________________|             
   Intestine Small, Duodenum               |       +           +                    +           +  +        A  +  +   |             
                                            __________________________________________________________________________|             
   Intestine Small, Ileum                  |       +           A                    +           +  +        A  +  +   |             
                                            __________________________________________________________________________|             
   Intestine Small, Jejunum                |       +           A                    +           +  +        +  +  +   |             
                                            __________________________________________________________________________|             
   Liver                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Hepatocellular Carcinoma             |                                                                          |             
      Hepatocellular Adenoma               | X           X                       X        X              X           X|             
      Hepatocellular Adenoma, Multiple     |    X           X                          X                              |             
      Hepatocholangiocarcinoma             |          X                                                               |             
      Leukemia Mononuclear                 |    X           X                    X  X  X        X           X         |             
                                            __________________________________________________________________________|             
   Mesentery                               |                                                                          |             
                                            __________________________________________________________________________|             
   Pancreas                                |       +           A                    +           +  +        A  +  +   |             
                                            __________________________________________________________________________|             
   Salivary Glands                         |       +           +                    +           +  +        +  +  +   |             
                                            __________________________________________________________________________|             
   Stomach                                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Stomach, Forestomach                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Stomach, Glandular                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Tongue                                  |                                                                   +      |             
      Squamous Cell Carcinoma              |                                                                   X      |             
 _____________________________________________________________________________________________________________________|             
 CARDIOVASCULAR SYSTEM                     |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Heart                                   |       +           +                    +           +  +        +  +  +   |             
 _____________________________________________________________________________________________________________________|             
 ENDOCRINE SYSTEM                          |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Adrenal Gland                           |       +           A                    +           +  +        A  +  +   |             
                                            __________________________________________________________________________|             
   Adrenal Gland, Cortex                   |       +           A                    +           +  +        A  +  +   |             
      Leukemia Mononuclear                 |                                                    X                     |             
                                            __________________________________________________________________________|             
   Adrenal Gland, Medulla                  |       +           A                    +           +  +        A  +  +   |             
      Leukemia Mononuclear                 |                                                    X                     |             
                                            __________________________________________________________________________|             
   Islets, Pancreatic                      |       +           A                    +           +  +        A  +  +   |             
                                            __________________________________________________________________________|             
   Parathyroid Gland                       |       +           M                    +           +  +        +  +  +   |             
                                            __________________________________________________________________________|             
   Pituitary Gland                         | +     +           +              +  +  +           +  +  +     +  +  +   |             
      Pars Distalis, Adenoma               | X                                   X                 X  X               |             
      Pars Intermedia, Adenoma             |                                                                      X   |             
                                            __________________________________________________________________________|             
   Thyroid Gland                           |       +           A                    +           +  +        +  +  +   |             
 _____________________________________________________________________________________________________________________|             
 GENERAL BODY SYSTEM                       |                                                                          |             
                                           |                                                                          |             
    None                                   |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 GENITAL SYSTEM                            |                                                                          |             
 _____________________________________________________________________________________________________________________|             
                                                             Page  26                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 7| 7| 7| 7| 7| 7| 5| 7| 7| 7| 7| 7| 7| 5| 7| 7| 7| 6| 7| 7| 7| 5| 4| 7| 7|             
                             DAY ON TEST   | 2| 2| 1| 2| 2| 3| 0| 3| 3| 3| 3| 3| 3| 9| 3| 3| 3| 3| 1| 3| 3| 7| 2| 0| 3|             
                                           | 9| 9| 1| 9| 9| 0| 7| 0| 0| 0| 0| 1| 1| 1| 1| 1| 1| 9| 8| 1| 2| 4| 9| 7| 2|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   FISCHER 344 RATS FEMALE                 | 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1|             
                               ANIMAL ID   | 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2|             
    10 PPM                                 | 1| 1| 1| 1| 1| 2| 2| 2| 2| 2| 3| 3| 3| 3| 3| 4| 4| 4| 4| 4| 5| 5| 5| 5| 5|             
     3-3                                   | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|             
 _____________________________________________________________________________________________________________________|             
 GENITAL SYSTEM - cont                     |                                                                          |             
                                           |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Clitoral Gland                          |       +           A                    +           +  +        +  +  +   |             
                                            __________________________________________________________________________|             
   Ovary                                   |       +           +                    +        +  +  +        +  +  +   |             
                                            __________________________________________________________________________|             
   Uterus                                  |       +           +                    +     +  +  +  +  +     +  +  +  +|             
      Polyp Stromal                        |                                                 X        X               |             
 _____________________________________________________________________________________________________________________|             
 HEMATOPOIETIC SYSTEM                      |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Bone Marrow                             |       +           A                    +           +  +        A  +  +   |             
                                            __________________________________________________________________________|             
   Lymph Node                              |       +           +                    +           +  +        +  +  +   |             
      Mandibular, Leukemia Mononuclear     |                                        X           X           X         |             
      Mediastinal, Leukemia Mononuclear    |                                        X           X                     |             
                                            __________________________________________________________________________|             
   Lymph Node, Mesenteric                  |                                                                          |             
                                            __________________________________________________________________________|             
   Spleen                                  | +  +  +  +  +  +  A  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |    X           X                    X  X  X        X           X         |             
                                            __________________________________________________________________________|             
   Thymus                                  |       +           M                    +           +  +        +  +  +   |             
      Leukemia Mononuclear                 |                                                                X         |             
 _____________________________________________________________________________________________________________________|             
 INTEGUMENTARY SYSTEM                      |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Mammary Gland                           |       +        +  M                    +           +  +        +  +  +   |             
      Adenoma                              |                                                                          |             
      Fibroadenoma                         |                X                                                     X   |             
                                            __________________________________________________________________________|             
   Skin                                    |       +           +                    +           +  +        +  +  +   |             
 _____________________________________________________________________________________________________________________|             
 MUSCULOSKELETAL SYSTEM                    |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Bone                                    |       +           +                    +           +  +        +  +  +   |             
 _____________________________________________________________________________________________________________________|             
 NERVOUS SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Brain                                   |       +           A                    +           +  +        +  +  +   |             
                                            __________________________________________________________________________|             
   Spinal Cord                             |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 RESPIRATORY SYSTEM                        |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Lung                                    |       +           +                    +           +  +        +  +      |             
      Leukemia Mononuclear                 |                                        X           X           X         |             
                                            __________________________________________________________________________|             
   Nose                                    |       +           A                    +           +  +        +  +  +   |             
                                            __________________________________________________________________________|             
   Trachea                                 |       +           A                    +           +  +        +  +  +   |             
 _____________________________________________________________________________________________________________________|             
 SPECIAL SENSES SYSTEM                     |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Eye                                     |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 URINARY SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Kidney                                  |       +           +                    +           +  +        +  +  +   |             
                                            __________________________________________________________________________|             
   Urinary Bladder                         |       +           A                    +           +  +        +  +  +   |             
 _____________________________________________________________________________________________________________________|             
 SYSTEMIC LESIONS                          |                                                                          |             
                                            __________________________________________________________________________|             
   Multiple Organs                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             
                                                             Page  27                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 7| 7| 7| 7| 7| 7| 5| 7| 7| 7| 7| 7| 7| 5| 7| 7| 7| 6| 7| 7| 7| 5| 4| 7| 7|             
                             DAY ON TEST   | 2| 2| 1| 2| 2| 3| 0| 3| 3| 3| 3| 3| 3| 9| 3| 3| 3| 3| 1| 3| 3| 7| 2| 0| 3|             
                                           | 9| 9| 1| 9| 9| 0| 7| 0| 0| 0| 0| 1| 1| 1| 1| 1| 1| 9| 8| 1| 2| 4| 9| 7| 2|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   FISCHER 344 RATS FEMALE                 | 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1|             
                               ANIMAL ID   | 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2|             
    10 PPM                                 | 1| 1| 1| 1| 1| 2| 2| 2| 2| 2| 3| 3| 3| 3| 3| 4| 4| 4| 4| 4| 5| 5| 5| 5| 5|             
     3-3                                   | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|             
 _____________________________________________________________________________________________________________________|             
 SYSTEMIC LESIONS - cont                   |                                                                          |             
                                           |                                                                          |             
      Leukemia Mononuclear                 |    X           X                    X  X  X        X           X         |             
 _____________________________________________________________________________________________________________________|             
                                                             Page  28                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 6| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 6|            |
                             DAY ON TEST   | 2| 3| 3| 3| 3| 2| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 4|            |
                                           | 5| 2| 2| 2| 3| 0| 3| 3| 3| 3| 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 8| 8| 8| 8| 6|            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     O      |
   FISCHER 344 RATS FEMALE                 | 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1|     T      |
                               ANIMAL ID   | 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 3| 3| 3| 3| 3|     A      |
    10 PPM                                 | 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 8| 8| 8| 8| 8| 9| 9| 9| 9| 9| 0| 0| 0| 0| 0|     L      |
     3-3                                   | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|            |
 __________________________________________________________________________________________________________________________________ 
 ALIMENTARY SYSTEM                         |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Esophagus                               | +              +                                                        +|  11        |
                                            __________________________________________________________________________|____________|
   Intestine Large                         | +              +                                                        +|  11        |
                                            __________________________________________________________________________|____________|
   Intestine Large, Cecum                  | +              +                                                        +|  10        |
      Leiomyosarcoma                       |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Intestine Large, Colon                  | +              +                                                        +|  11        |
                                            __________________________________________________________________________|____________|
   Intestine Large, Rectum                 | +              +                                                        +|   9        |
                                            __________________________________________________________________________|____________|
   Intestine Small                         | +              +                                                        +|  11        |
                                            __________________________________________________________________________|____________|
   Intestine Small, Duodenum               | +              +                                                        +|  10        |
                                            __________________________________________________________________________|____________|
   Intestine Small, Ileum                  | +              +                                                        +|   9        |
                                            __________________________________________________________________________|____________|
   Intestine Small, Jejunum                | +              +                                                        +|  10        |
                                            __________________________________________________________________________|____________|
   Liver                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Hepatocellular Carcinoma             | X                                                                        |          1 |
      Hepatocellular Adenoma               | X                 X              X        X  X     X                     |         12 |
      Hepatocellular Adenoma, Multiple     |          X                          X  X              X  X        X  X   |         10 |
      Hepatocholangiocarcinoma             |                                                                          |          1 |
      Leukemia Mononuclear                 | X        X  X        X        X     X     X        X     X        X      |         17 |
                                            __________________________________________________________________________|____________|
   Mesentery                               |                                  +                                       |   1        |
                                            __________________________________________________________________________|____________|
   Pancreas                                | +              +                                                        +|   9        |
                                            __________________________________________________________________________|____________|
   Salivary Glands                         | +              +                                                        +|  11        |
                                            __________________________________________________________________________|____________|
   Stomach                                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Stomach, Forestomach                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Stomach, Glandular                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Tongue                                  |                                                                          |   1        |
      Squamous Cell Carcinoma              |                                                                          |          1 |
 _____________________________________________________________________________________________________________________|            |
 CARDIOVASCULAR SYSTEM                     |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Heart                                   | +              +                                                        +|  11        |
 _____________________________________________________________________________________________________________________|            |
 ENDOCRINE SYSTEM                          |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Adrenal Gland                           | +              +                                                        +|   9        |
                                            __________________________________________________________________________|____________|
   Adrenal Gland, Cortex                   | +              +                                                        +|   9        |
      Leukemia Mononuclear                 |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Adrenal Gland, Medulla                  | +              +                                                        +|   9        |
      Leukemia Mononuclear                 |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Islets, Pancreatic                      | +              +                                                        +|   9        |
                                            __________________________________________________________________________|____________|
   Parathyroid Gland                       | +              M                                                        +|   9        |
                                            __________________________________________________________________________|____________|
   Pituitary Gland                         | +     +        +  +     +  +  +     +  +  +     +     +  +     +  +     +|  28        |
      Pars Distalis, Adenoma               |       X        X        X     X        X        X     X  X               |         12 |
      Pars Intermedia, Adenoma             |                                                                          |          1 |
 __________________________________________________________________________________________________________________________________ 
                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  
                                                             Page  29                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 6| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 6|            |
                             DAY ON TEST   | 2| 3| 3| 3| 3| 2| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 4|            |
                                           | 5| 2| 2| 2| 3| 0| 3| 3| 3| 3| 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 8| 8| 8| 8| 6|            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     O      |
   FISCHER 344 RATS FEMALE                 | 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1|     T      |
                               ANIMAL ID   | 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 3| 3| 3| 3| 3|     A      |
    10 PPM                                 | 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 8| 8| 8| 8| 8| 9| 9| 9| 9| 9| 0| 0| 0| 0| 0|     L      |
     3-3                                   | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|            |
 __________________________________________________________________________________________________________________________________ 
 ENDOCRINE SYSTEM - cont                   |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Thyroid Gland                           | +              +                                                        +|  10        |
 _____________________________________________________________________________________________________________________|            |
 GENERAL BODY SYSTEM                       |                                                                          |            |
                                           |                                                                          |            |
    None                                   |                                                                          |            |
 _____________________________________________________________________________________________________________________|            |
 GENITAL SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Clitoral Gland                          | +              +                                                        +|  10        |
                                            __________________________________________________________________________|____________|
   Ovary                                   | +              +  +                                            +        +|  14        |
                                            __________________________________________________________________________|____________|
   Uterus                                  | +  +     +     +     +                 +           +  +                 +|  21        |
      Polyp Stromal                        |          X           X                 X                                X|          6 |
 _____________________________________________________________________________________________________________________|            |
 HEMATOPOIETIC SYSTEM                      |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Bone Marrow                             | +              +                                                        +|   9        |
                                            __________________________________________________________________________|____________|
   Lymph Node                              | +              +                                         +              +|  12        |
      Mandibular, Leukemia Mononuclear     | X                                                                        |          4 |
      Mediastinal, Leukemia Mononuclear    |                                                          X               |          3 |
                                            __________________________________________________________________________|____________|
   Lymph Node, Mesenteric                  |                                                          +               |   1        |
                                            __________________________________________________________________________|____________|
   Spleen                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
      Leukemia Mononuclear                 | X        X  X        X        X     X     X        X     X        X      |         17 |
                                            __________________________________________________________________________|____________|
   Thymus                                  | M              +                                                        +|   9        |
      Leukemia Mononuclear                 |                                                                          |          1 |
 _____________________________________________________________________________________________________________________|            |
 INTEGUMENTARY SYSTEM                      |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Mammary Gland                           | +              +     +  +     +              +              +           +|  16        |
      Adenoma                              |                                              X                           |          1 |
      Fibroadenoma                         |                X     X  X     X                             X            |          7 |
                                            __________________________________________________________________________|____________|
   Skin                                    | +              +                                                        +|  11        |
 _____________________________________________________________________________________________________________________|            |
 MUSCULOSKELETAL SYSTEM                    |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Bone                                    | +              +                                                        +|  11        |
 _____________________________________________________________________________________________________________________|            |
 NERVOUS SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Brain                                   | +              +                                                        +|  10        |
                                            __________________________________________________________________________|____________|
   Spinal Cord                             |                                                             +            |   1        |
 _____________________________________________________________________________________________________________________|            |
 RESPIRATORY SYSTEM                        |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Lung                                    | +              +                                                         |   9        |
      Leukemia Mononuclear                 | X                                                                        |          4 |
                                            __________________________________________________________________________|____________|
   Nose                                    | +              +                                                        +|  10        |
 __________________________________________________________________________________________________________________________________ 
                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  
                                                             Page  30                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 6| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 6|            |
                             DAY ON TEST   | 2| 3| 3| 3| 3| 2| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 4|            |
                                           | 5| 2| 2| 2| 3| 0| 3| 3| 3| 3| 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 8| 8| 8| 8| 6|            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     O      |
   FISCHER 344 RATS FEMALE                 | 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1|     T      |
                               ANIMAL ID   | 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 3| 3| 3| 3| 3|     A      |
    10 PPM                                 | 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 8| 8| 8| 8| 8| 9| 9| 9| 9| 9| 0| 0| 0| 0| 0|     L      |
     3-3                                   | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|            |
 __________________________________________________________________________________________________________________________________ 
 RESPIRATORY SYSTEM - cont                 |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Trachea                                 | +              +                                                        +|  10        |
 _____________________________________________________________________________________________________________________|            |
 SPECIAL SENSES SYSTEM                     |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Eye                                     |             +              +                 +                           |   3        |
 _____________________________________________________________________________________________________________________|            |
 URINARY SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Kidney                                  | +              +                                                        +|  11        |
                                            __________________________________________________________________________|____________|
   Urinary Bladder                         | +              +                                                        +|  10        |
 __________________________________________________________________________________________________________________________________ 
 SYSTEMIC LESIONS                          |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Multiple Organs                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 | X        X  X        X        X     X     X        X     X        X      |         17 |
 __________________________________________________________________________________________________________________________________ 
                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  
                                                             Page  31                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 7| 7| 6| 7| 7| 6| 7| 7| 7| 7| 7| 7| 7| 7| 7| 5| 7| 7| 7| 7| 7| 7| 7| 7| 6|             
                             DAY ON TEST   | 2| 2| 8| 2| 2| 2| 1| 3| 3| 3| 3| 3| 3| 3| 3| 1| 3| 3| 3| 3| 3| 3| 3| 3| 2|             
                                           | 9| 9| 5| 9| 9| 1| 1| 0| 0| 0| 0| 0| 1| 1| 1| 1| 1| 1| 2| 2| 2| 2| 2| 3| 5|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   FISCHER 344 RATS FEMALE                 | 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1|             
                               ANIMAL ID   | 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3|             
    10 PPM                                 | 1| 1| 1| 1| 1| 2| 2| 2| 2| 2| 3| 3| 3| 3| 3| 4| 4| 4| 4| 4| 5| 5| 5| 5| 5|             
     10-3                                  | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|             
 _____________________________________________________________________________________________________________________|             
 ALIMENTARY SYSTEM                         |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Esophagus                               |       +        +  +                          +                          +|             
                                            __________________________________________________________________________|             
   Intestine Large                         |       +     M  +  +                          +                          +|             
                                            __________________________________________________________________________|             
   Intestine Large, Cecum                  |       +        +  +                          +                          +|             
                                            __________________________________________________________________________|             
   Intestine Large, Colon                  |       +     M  +  +                          +                          +|             
                                            __________________________________________________________________________|             
   Intestine Large, Rectum                 |       +        +  +                          +                          +|             
                                            __________________________________________________________________________|             
   Intestine Small                         |       +        +  +                          +                          +|             
                                            __________________________________________________________________________|             
   Intestine Small, Duodenum               |       +        +  +                          +                          +|             
                                            __________________________________________________________________________|             
   Intestine Small, Ileum                  |       +        +  +                          +                          +|             
                                            __________________________________________________________________________|             
   Intestine Small, Jejunum                |       +        +  +                          +                          +|             
                                            __________________________________________________________________________|             
   Liver                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Hepatocellular Carcinoma             |       X                                         X                        |             
      Hepatocellular Carcinoma, Multiple   |                                                                          |             
      Hepatocellular Adenoma               | X        X        X                 X  X  X        X        X            |             
      Hepatocellular Adenoma, Multiple     |       X              X  X  X  X  X              X        X     X  X      |             
      Leukemia Mononuclear                 |       X  X  X  X              X     X     X  X  X  X  X        X        X|             
                                            __________________________________________________________________________|             
   Mesentery                               |                                  +                                       |             
      Hepatocellular Carcinoma, Metastatic,|                                                                          |             
           Liver                           |                                                                          |             
                                            __________________________________________________________________________|             
   Pancreas                                |       +        +  +                          +                          +|             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Salivary Glands                         |       +        +  +                          +                          +|             
                                            __________________________________________________________________________|             
   Stomach                                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Stomach, Forestomach                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +     +  +  +  +|             
                                            __________________________________________________________________________|             
   Stomach, Glandular                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Tongue                                  |                                                                          |             
      Carcinoma, Metastatic, Zymbal's Gland|                                                                          |             
 _____________________________________________________________________________________________________________________|             
 CARDIOVASCULAR SYSTEM                     |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Heart                                   |       +        +  +                          +                          +|             
      Leukemia Mononuclear                 |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 ENDOCRINE SYSTEM                          |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Adrenal Gland                           |       +        +  +                          +                          +|             
                                            __________________________________________________________________________|             
   Adrenal Gland, Cortex                   |       +        +  +                          +                          +|             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Adrenal Gland, Medulla                  |       +        +  +                          +                          +|             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Islets, Pancreatic                      |       +        +  +                          +                          +|             
                                            __________________________________________________________________________|             
   Parathyroid Gland                       |       +        +  +                          +                          M|             
                                            __________________________________________________________________________|             
   Pituitary Gland                         |       +     +  +  +     +  +        +  +  +  +                       +  +|             
      Pars Distalis, Adenoma               |             X           X  X        X     X                          X   |             
      Pars Distalis, Leukemia Mononuclear  |                                                                          |             
                                            __________________________________________________________________________|             
   Thyroid Gland                           |       +     +  +  +                          +                          +|             
 _____________________________________________________________________________________________________________________|             
                                                             Page  32                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 7| 7| 6| 7| 7| 6| 7| 7| 7| 7| 7| 7| 7| 7| 7| 5| 7| 7| 7| 7| 7| 7| 7| 7| 6|             
                             DAY ON TEST   | 2| 2| 8| 2| 2| 2| 1| 3| 3| 3| 3| 3| 3| 3| 3| 1| 3| 3| 3| 3| 3| 3| 3| 3| 2|             
                                           | 9| 9| 5| 9| 9| 1| 1| 0| 0| 0| 0| 0| 1| 1| 1| 1| 1| 1| 2| 2| 2| 2| 2| 3| 5|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   FISCHER 344 RATS FEMALE                 | 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1|             
                               ANIMAL ID   | 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3|             
    10 PPM                                 | 1| 1| 1| 1| 1| 2| 2| 2| 2| 2| 3| 3| 3| 3| 3| 4| 4| 4| 4| 4| 5| 5| 5| 5| 5|             
     10-3                                  | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|             
 _____________________________________________________________________________________________________________________|             
 ENDOCRINE SYSTEM - cont                   |                                                                          |             
                                           |                                                                          |             
      Leukemia Mononuclear                 |                                                                          |             
      C-Cell, Adenoma                      |             X  X                                                         |             
 _____________________________________________________________________________________________________________________|             
 GENERAL BODY SYSTEM                       |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Tissue NOS                              |                                                                          |             
      Liposarcoma                          |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 GENITAL SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Clitoral Gland                          |       +        +  +                          +                          +|             
      Adenoma                              |                                                                          |             
                                            __________________________________________________________________________|             
   Ovary                                   |       +        +  +        +     +  +        +  +  +  +              +  +|             
      Leukemia Mononuclear                 |       X                                                                  |             
                                            __________________________________________________________________________|             
   Uterus                                  |    +  +        +  +     +                 +  +     +                    +|             
      Leukemia Mononuclear                 |                                                                          |             
      Polyp Stromal                        |    X                    X                          X                     |             
 _____________________________________________________________________________________________________________________|             
 HEMATOPOIETIC SYSTEM                      |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Bone Marrow                             |       +        +  +                          +                          +|             
      Femoral, Leukemia Mononuclear        |                                              X                           |             
                                            __________________________________________________________________________|             
   Lymph Node                              |       +        +  +                          +                          +|             
      Mandibular, Leukemia Mononuclear     |       X        X                             X                           |             
      Mediastinal, Leukemia Mononuclear    |       X                                                                  |             
                                            __________________________________________________________________________|             
   Lymph Node, Mesenteric                  |                                                                          |             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Spleen                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |       X  X  X  X              X     X     X  X  X  X  X        X        X|             
                                            __________________________________________________________________________|             
   Thymus                                  |       +        +  +                          I                          +|             
      Leukemia Mononuclear                 |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 INTEGUMENTARY SYSTEM                      |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Mammary Gland                           |       +        +                             M                    +     +|             
      Fibroadenoma                         |                                                                   X      |             
                                            __________________________________________________________________________|             
   Skin                                    |       +        +  +                          +                          +|             
      Subcutaneous Tissue, Fibrosarcoma    |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 MUSCULOSKELETAL SYSTEM                    |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Bone                                    |       +        +  +                          +                          +|             
 _____________________________________________________________________________________________________________________|             
 NERVOUS SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Brain                                   |       +        +  +                          +                          +|             
                                            __________________________________________________________________________|             
   Spinal Cord                             |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 RESPIRATORY SYSTEM                        |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Lung                                    |       +           +                          +                          +|             
 _____________________________________________________________________________________________________________________|             
                                                             Page  33                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 7| 7| 6| 7| 7| 6| 7| 7| 7| 7| 7| 7| 7| 7| 7| 5| 7| 7| 7| 7| 7| 7| 7| 7| 6|             
                             DAY ON TEST   | 2| 2| 8| 2| 2| 2| 1| 3| 3| 3| 3| 3| 3| 3| 3| 1| 3| 3| 3| 3| 3| 3| 3| 3| 2|             
                                           | 9| 9| 5| 9| 9| 1| 1| 0| 0| 0| 0| 0| 1| 1| 1| 1| 1| 1| 2| 2| 2| 2| 2| 3| 5|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   FISCHER 344 RATS FEMALE                 | 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1|             
                               ANIMAL ID   | 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3|             
    10 PPM                                 | 1| 1| 1| 1| 1| 2| 2| 2| 2| 2| 3| 3| 3| 3| 3| 4| 4| 4| 4| 4| 5| 5| 5| 5| 5|             
     10-3                                  | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|             
 _____________________________________________________________________________________________________________________|             
 RESPIRATORY SYSTEM - cont                 |                                                                          |             
                                           |                                                                          |             
      Hepatocellular Carcinoma, Metastatic,|                                                                          |             
           Liver                           |                                                                          |             
      Leukemia Mononuclear                 |       X                                                                 X|             
                                            __________________________________________________________________________|             
   Nose                                    |       +        +  +                          +                          +|             
                                            __________________________________________________________________________|             
   Trachea                                 |       +        +  +                          +                          +|             
 _____________________________________________________________________________________________________________________|             
 SPECIAL SENSES SYSTEM                     |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Eye                                     |                      +  +                                   +            |             
                                            __________________________________________________________________________|             
   Zymbal's Gland                          |                                                                          |             
      Carcinoma                            |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 URINARY SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Kidney                                  |       +        +  +                          +                          +|             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Urinary Bladder                         |       +        +  +                          +                          +|             
 _____________________________________________________________________________________________________________________|             
 SYSTEMIC LESIONS                          |                                                                          |             
                                            __________________________________________________________________________|             
   Multiple Organs                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |       X  X  X  X              X     X     X  X  X  X  X        X        X|             
 _____________________________________________________________________________________________________________________|             
                                                             Page  34                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 7| 7| 7| 7| 7| 7| 7| 6| 7| 7| 7| 6| 7| 7| 7| 7| 7| 6| 7| 5| 7| 6| 2| 7| 7|            |
                             DAY ON TEST   | 3| 1| 3| 3| 3| 3| 3| 0| 3| 3| 3| 1| 3| 3| 3| 3| 3| 5| 3| 2| 3| 5| 7| 3| 3|            |
                                           | 3| 4| 3| 3| 3| 6| 6| 8| 6| 6| 6| 0| 7| 7| 7| 7| 7| 3| 8| 9| 8| 2| 8| 8| 8|            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     O      |
   FISCHER 344 RATS FEMALE                 | 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1|     T      |
                               ANIMAL ID   | 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 4| 4| 4| 4| 4|     A      |
    10 PPM                                 | 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 8| 8| 8| 8| 8| 9| 9| 9| 9| 9| 0| 0| 0| 0| 0|     L      |
     10-3                                  | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|            |
 __________________________________________________________________________________________________________________________________ 
 ALIMENTARY SYSTEM                         |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Esophagus                               |    +                 +           +                 +     +     +  +      |  12        |
                                            __________________________________________________________________________|____________|
   Intestine Large                         |    +                 +           +                 +     +     +  +      |  12        |
                                            __________________________________________________________________________|____________|
   Intestine Large, Cecum                  |    +                 +           +                 +     +     +  +      |  12        |
                                            __________________________________________________________________________|____________|
   Intestine Large, Colon                  |    +                 +           +                 +     +     +  +      |  12        |
                                            __________________________________________________________________________|____________|
   Intestine Large, Rectum                 |    +                 +           +                 +     +     +  +      |  12        |
                                            __________________________________________________________________________|____________|
   Intestine Small                         |    +                 +           +                 +     +     +  +      |  12        |
                                            __________________________________________________________________________|____________|
   Intestine Small, Duodenum               |    +                 +           +                 +     +     +  +      |  12        |
                                            __________________________________________________________________________|____________|
   Intestine Small, Ileum                  |    +                 +           +                 +     +     +  M      |  11        |
                                            __________________________________________________________________________|____________|
   Intestine Small, Jejunum                |    +                 +           +                 +     +     +  +      |  12        |
                                            __________________________________________________________________________|____________|
   Liver                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Hepatocellular Carcinoma             |             X                             X        X     X  X            |          7 |
      Hepatocellular Carcinoma, Multiple   | X                                                                        |          1 |
      Hepatocellular Adenoma               |       X           X     X  X     X     X  X                              |         15 |
      Hepatocellular Adenoma, Multiple     |          X     X     X        X              X  X     X     X        X  X|         20 |
      Leukemia Mononuclear                 | X  X  X  X  X        X        X           X  X  X  X        X  X        X|         27 |
                                            __________________________________________________________________________|____________|
   Mesentery                               |                                     +                 +  +               |   4        |
      Hepatocellular Carcinoma, Metastatic,|                                                                          |            |
           Liver                           |                                                          X               |          1 |
                                            __________________________________________________________________________|____________|
   Pancreas                                |    +                 +           +                 +     +     +  +      |  12        |
      Leukemia Mononuclear                 |    X                                                                     |          1 |
                                            __________________________________________________________________________|____________|
   Salivary Glands                         |    +                 +           +                 +     +     +  +      |  12        |
                                            __________________________________________________________________________|____________|
   Stomach                                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Stomach, Forestomach                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
                                            __________________________________________________________________________|____________|
   Stomach, Glandular                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 |    X                                                                     |          1 |
                                            __________________________________________________________________________|____________|
   Tongue                                  |                                  +                                       |   1        |
      Carcinoma, Metastatic, Zymbal's Gland|                                  X                                       |          1 |
 _____________________________________________________________________________________________________________________|            |
 CARDIOVASCULAR SYSTEM                     |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Heart                                   |    +                 +           +                 +     +     +  +      |  12        |
      Leukemia Mononuclear                 |    X                                                                     |          1 |
 _____________________________________________________________________________________________________________________|            |
 ENDOCRINE SYSTEM                          |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Adrenal Gland                           |    +                 +           +                 +     +     +  +      |  12        |
                                            __________________________________________________________________________|____________|
   Adrenal Gland, Cortex                   |    +                 +           +                 +     +     +  +      |  12        |
      Leukemia Mononuclear                 |    X                                               X                     |          2 |
                                            __________________________________________________________________________|____________|
   Adrenal Gland, Medulla                  |    +                 +           +                 +     +     +  +      |  12        |
      Leukemia Mononuclear                 |    X                                               X                     |          2 |
                                            __________________________________________________________________________|____________|
   Islets, Pancreatic                      |    +                 +           +                 +     +     +  +      |  12        |
 __________________________________________________________________________________________________________________________________ 
                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  
                                                             Page  35                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 7| 7| 7| 7| 7| 7| 7| 6| 7| 7| 7| 6| 7| 7| 7| 7| 7| 6| 7| 5| 7| 6| 2| 7| 7|            |
                             DAY ON TEST   | 3| 1| 3| 3| 3| 3| 3| 0| 3| 3| 3| 1| 3| 3| 3| 3| 3| 5| 3| 2| 3| 5| 7| 3| 3|            |
                                           | 3| 4| 3| 3| 3| 6| 6| 8| 6| 6| 6| 0| 7| 7| 7| 7| 7| 3| 8| 9| 8| 2| 8| 8| 8|            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     O      |
   FISCHER 344 RATS FEMALE                 | 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1|     T      |
                               ANIMAL ID   | 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 4| 4| 4| 4| 4|     A      |
    10 PPM                                 | 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 8| 8| 8| 8| 8| 9| 9| 9| 9| 9| 0| 0| 0| 0| 0|     L      |
     10-3                                  | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|            |
 __________________________________________________________________________________________________________________________________ 
 ENDOCRINE SYSTEM - cont                   |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Parathyroid Gland                       |    +                 +           M                 +     +     +  +      |  10        |
                                            __________________________________________________________________________|____________|
   Pituitary Gland                         | +  +        +  +  +  +           +     +  +        +  +  +  +  +  +      |  27        |
      Pars Distalis, Adenoma               | X           X  X  X  X                                X                  |         12 |
      Pars Distalis, Leukemia Mononuclear  |                                                    X                     |          1 |
                                            __________________________________________________________________________|____________|
   Thyroid Gland                           |    +                 +           +                 +     +     +  +      |  13        |
      Leukemia Mononuclear                 |    X                                               X                     |          2 |
      C-Cell, Adenoma                      |                                                                          |          2 |
 _____________________________________________________________________________________________________________________|            |
 GENERAL BODY SYSTEM                       |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Tissue NOS                              |                      +                                                   |   1        |
      Liposarcoma                          |                      X                                                   |          1 |
 _____________________________________________________________________________________________________________________|            |
 GENITAL SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Clitoral Gland                          |    +                 +           +                 +     +     +  +     +|  13        |
      Adenoma                              |                                                                         X|          1 |
                                            __________________________________________________________________________|____________|
   Ovary                                   |    +                 +     +     +                 +     +     +  +      |  20        |
      Leukemia Mononuclear                 |                                                    X                     |          2 |
                                            __________________________________________________________________________|____________|
   Uterus                                  |    +     +           +        +  +           +  +  +     +     +  +      |  20        |
      Leukemia Mononuclear                 |    X                                                                     |          1 |
      Polyp Stromal                        |                                                 X                        |          4 |
 _____________________________________________________________________________________________________________________|            |
 HEMATOPOIETIC SYSTEM                      |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Bone Marrow                             |    I                 +           +                 +     +     +  +      |  11        |
      Femoral, Leukemia Mononuclear        |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Lymph Node                              |    +     +           +           +                 +     +     +         |  12        |
      Mandibular, Leukemia Mononuclear     |    X     X           X                             X           X         |          8 |
      Mediastinal, Leukemia Mononuclear    |    X                                                           X         |          3 |
                                            __________________________________________________________________________|____________|
   Lymph Node, Mesenteric                  |    +                                               +           +         |   3        |
      Leukemia Mononuclear                 |    X                                               X           X         |          3 |
                                            __________________________________________________________________________|____________|
   Spleen                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +     +  +  +  +  +  +|  49        |
      Leukemia Mononuclear                 | X  X  X  X  X        X        X           X  X  X  X        X  X        X|         27 |
                                            __________________________________________________________________________|____________|
   Thymus                                  |    +                 +           +                 +     M     +  +      |  10        |
      Leukemia Mononuclear                 |    X                                               X                     |          2 |
 _____________________________________________________________________________________________________________________|            |
 INTEGUMENTARY SYSTEM                      |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Mammary Gland                           |    +                 +           +                 +     +     +  +      |  11        |
      Fibroadenoma                         |                      X                                                   |          2 |
                                            __________________________________________________________________________|____________|
   Skin                                    |    +                 +        +  +                 +  +  +     +  +      |  14        |
      Subcutaneous Tissue, Fibrosarcoma    |                               X                       X           X      |          3 |
 __________________________________________________________________________________________________________________________________ 
                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  
                                                             Page  36                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 7| 7| 7| 7| 7| 7| 7| 6| 7| 7| 7| 6| 7| 7| 7| 7| 7| 6| 7| 5| 7| 6| 2| 7| 7|            |
                             DAY ON TEST   | 3| 1| 3| 3| 3| 3| 3| 0| 3| 3| 3| 1| 3| 3| 3| 3| 3| 5| 3| 2| 3| 5| 7| 3| 3|            |
                                           | 3| 4| 3| 3| 3| 6| 6| 8| 6| 6| 6| 0| 7| 7| 7| 7| 7| 3| 8| 9| 8| 2| 8| 8| 8|            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     O      |
   FISCHER 344 RATS FEMALE                 | 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1|     T      |
                               ANIMAL ID   | 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 4| 4| 4| 4| 4|     A      |
    10 PPM                                 | 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 8| 8| 8| 8| 8| 9| 9| 9| 9| 9| 0| 0| 0| 0| 0|     L      |
     10-3                                  | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|            |
 __________________________________________________________________________________________________________________________________ 
 INTEGUMENTARY SYSTEM - cont               |                                                                          |            |
                                           |                                                                          |            |
 _____________________________________________________________________________________________________________________|            |
 MUSCULOSKELETAL SYSTEM                    |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Bone                                    |    +                 +           +                 +     +     +  +      |  12        |
 _____________________________________________________________________________________________________________________|            |
 NERVOUS SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Brain                                   |    +                 +           +                 +     +     +  +      |  12        |
                                            __________________________________________________________________________|____________|
   Spinal Cord                             |    +                                                                     |   1        |
 _____________________________________________________________________________________________________________________|            |
 RESPIRATORY SYSTEM                        |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Lung                                    |    +                 +           +                 +     +     +  +      |  11        |
      Hepatocellular Carcinoma, Metastatic,|                                                                          |            |
           Liver                           |                                                          X               |          1 |
      Leukemia Mononuclear                 |    X                                               X           X         |          5 |
                                            __________________________________________________________________________|____________|
   Nose                                    |    +                 +           +                 +     +     +  +      |  12        |
                                            __________________________________________________________________________|____________|
   Trachea                                 |    +                 +           +                 +     +     +  +      |  12        |
 _____________________________________________________________________________________________________________________|            |
 SPECIAL SENSES SYSTEM                     |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Eye                                     |                                                 +     +                  |   5        |
                                            __________________________________________________________________________|____________|
   Zymbal's Gland                          |                                  +                                       |   1        |
      Carcinoma                            |                                  X                                       |          1 |
 _____________________________________________________________________________________________________________________|            |
 URINARY SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Kidney                                  |    +                 +           +                 +     +     +  +      |  12        |
      Leukemia Mononuclear                 |    X                                               X           X         |          3 |
                                            __________________________________________________________________________|____________|
   Urinary Bladder                         |    +                 +           +  +              +     +     +  M      |  12        |
 __________________________________________________________________________________________________________________________________ 
 SYSTEMIC LESIONS                          |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Multiple Organs                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 | X  X  X  X  X        X        X           X  X  X  X        X  X        X|         27 |
 __________________________________________________________________________________________________________________________________ 
                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  
                                                             Page  37                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 7| 7| 7| 7| 7| 7| 5| 7| 6| 7| 7| 7| 6| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 6|             
                             DAY ON TEST   | 2| 2| 2| 2| 3| 3| 9| 3| 8| 3| 3| 3| 7| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 5|             
                                           | 9| 9| 9| 9| 0| 0| 3| 0| 8| 0| 1| 1| 4| 1| 1| 1| 2| 2| 2| 2| 2| 3| 3| 3| 9|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   FISCHER 344 RATS FEMALE                 | 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1|             
                               ANIMAL ID   | 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4|             
    30 PPM                                 | 1| 1| 1| 1| 1| 2| 2| 2| 2| 2| 3| 3| 3| 3| 3| 4| 4| 4| 4| 4| 5| 5| 5| 5| 5|             
     0-10                                  | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|             
 _____________________________________________________________________________________________________________________|             
 ALIMENTARY SYSTEM                         |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Esophagus                               |    +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Large                         |    +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Large, Cecum                  |    +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Large, Colon                  |    +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Large, Rectum                 |    +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Small                         |    +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Small, Duodenum               |    +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Small, Ileum                  |    +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  M|             
                                            __________________________________________________________________________|             
   Intestine Small, Jejunum                |    +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Liver                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Hepatocellular Carcinoma             |                      X                                                   |             
      Hepatocellular Adenoma               |                                                                          |             
      Hepatocellular Adenoma, Multiple     | X  X  X  X     X  X  X     X  X  X     X        X  X  X  X  X  X  X  X   |             
      Hepatocholangiocarcinoma             |                                                             X            |             
      Leukemia Mononuclear                 |             X     X           X              X  X                       X|             
                                            __________________________________________________________________________|             
   Pancreas                                | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Salivary Glands                         |    +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Stomach                                 |    +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Stomach, Forestomach                    |    +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Squamous Cell Papilloma              |                                                                          |             
                                            __________________________________________________________________________|             
   Stomach, Glandular                      |    +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             
 CARDIOVASCULAR SYSTEM                     |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Heart                                   |    +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                   X                                                      |             
 _____________________________________________________________________________________________________________________|             
 ENDOCRINE SYSTEM                          |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Adrenal Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Adrenal Gland, Cortex                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                         X|             
      Bilateral, Adenoma                   |                                                                          |             
                                            __________________________________________________________________________|             
   Adrenal Gland, Medulla                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +     +  +  +  +|             
      Leukemia Mononuclear                 |                                                                         X|             
                                            __________________________________________________________________________|             
   Islets, Pancreatic                      |    +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Parathyroid Gland                       | +  +  +  +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  M  M  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Pituitary Gland                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Pars Distalis, Adenoma               |             X                                                            |             
      Pars Distalis, Adenoma, Mild         |                X                                                         |             
      Pars Distalis, Adenoma, Moderate     |                                                                          |             
                                            __________________________________________________________________________|             
   Thyroid Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  A|             
      C-Cell, Adenoma                      |                                                                          |             
      C-Cell, Carcinoma                    |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 GENERAL BODY SYSTEM                       |                                                                          |             
                                           |                                                                          |             
    None                                   |                                                                          |             
 _____________________________________________________________________________________________________________________|             
                                                             Page  38                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 7| 7| 7| 7| 7| 7| 5| 7| 6| 7| 7| 7| 6| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 6|             
                             DAY ON TEST   | 2| 2| 2| 2| 3| 3| 9| 3| 8| 3| 3| 3| 7| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 5|             
                                           | 9| 9| 9| 9| 0| 0| 3| 0| 8| 0| 1| 1| 4| 1| 1| 1| 2| 2| 2| 2| 2| 3| 3| 3| 9|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   FISCHER 344 RATS FEMALE                 | 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1|             
                               ANIMAL ID   | 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4|             
    30 PPM                                 | 1| 1| 1| 1| 1| 2| 2| 2| 2| 2| 3| 3| 3| 3| 3| 4| 4| 4| 4| 4| 5| 5| 5| 5| 5|             
     0-10                                  | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|             
 _____________________________________________________________________________________________________________________|             
 GENITAL SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Clitoral Gland                          |    +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Carcinoma                            |                                                                          |             
                                            __________________________________________________________________________|             
   Ovary                                   |    +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +     +  +  +  +  +  +|             
      Leiomyosarcoma                       |                                                 X                        |             
                                            __________________________________________________________________________|             
   Uterus                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +     +  +  +  +  +  +|             
      Polyp Stromal                        |             X                    X                 X                     |             
 _____________________________________________________________________________________________________________________|             
 HEMATOPOIETIC SYSTEM                      |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Bone Marrow                             |    +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +     +  +  +  +  +  +|             
      Femoral, Leukemia Mononuclear        |                                              X                          X|             
                                            __________________________________________________________________________|             
   Lymph Node                              |    +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Mandibular, Leukemia Mononuclear     |                   X                          X                          X|             
      Mediastinal, Leukemia Mononuclear    |                                              X                           |             
      Pancreatic, Leukemia Mononuclear     |                                              X                           |             
                                            __________________________________________________________________________|             
   Lymph Node, Mesenteric                  |                                                                          |             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Lymph Node, Thoracic                    |                                                                          |             
                                            __________________________________________________________________________|             
   Spleen                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |             X     X           X              X                          X|             
                                            __________________________________________________________________________|             
   Thymus                                  |    +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +  +  M  +  +  +  M  +  +|             
      Leukemia Mononuclear                 |                                              X                           |             
 _____________________________________________________________________________________________________________________|             
 INTEGUMENTARY SYSTEM                      |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Mammary Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Fibroadenoma                         |                                                                          |             
      Fibroadenoma, Multiple               |       X                                                                  |             
                                            __________________________________________________________________________|             
   Skin                                    |    +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Squamous Cell Papilloma              |                X                                                         |             
      Subcutaneous Tissue, Lipoma          |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 MUSCULOSKELETAL SYSTEM                    |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Bone                                    |    +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             
 NERVOUS SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Brain                                   |    +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             
 RESPIRATORY SYSTEM                        |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Lung                                    |    +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Alveolar/Bronchiolar Adenoma         |                                                 X                        |             
      Hepatocellular Carcinoma, Metastatic,|                                                                          |             
           Liver                           |                                                                          |             
      Leukemia Mononuclear                 |                   X                          X                          X|             
      Squamous Cell Carcinoma, Metastatic, |                                                                          |             
           Clitoral Gland                  |                                                                          |             
 _____________________________________________________________________________________________________________________|             
                                                             Page  39                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 7| 7| 7| 7| 7| 7| 5| 7| 6| 7| 7| 7| 6| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 6|             
                             DAY ON TEST   | 2| 2| 2| 2| 3| 3| 9| 3| 8| 3| 3| 3| 7| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 5|             
                                           | 9| 9| 9| 9| 0| 0| 3| 0| 8| 0| 1| 1| 4| 1| 1| 1| 2| 2| 2| 2| 2| 3| 3| 3| 9|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   FISCHER 344 RATS FEMALE                 | 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1|             
                               ANIMAL ID   | 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4|             
    30 PPM                                 | 1| 1| 1| 1| 1| 2| 2| 2| 2| 2| 3| 3| 3| 3| 3| 4| 4| 4| 4| 4| 5| 5| 5| 5| 5|             
     0-10                                  | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|             
 _____________________________________________________________________________________________________________________|             
 RESPIRATORY SYSTEM - cont                 |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Nose                                    |    +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +     +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Trachea                                 |    +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             
 SPECIAL SENSES SYSTEM                     |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Eye                                     |                                     +                 +                  |             
 _____________________________________________________________________________________________________________________|             
 URINARY SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Kidney                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                              X                           |             
                                            __________________________________________________________________________|             
   Urinary Bladder                         |    +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             
 SYSTEMIC LESIONS                          |                                                                          |             
                                            __________________________________________________________________________|             
   Multiple Organs                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |             X     X           X              X  X                       X|             
 _____________________________________________________________________________________________________________________|             
                                                             Page  40                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 7| 5| 7| 7| 7| 7| 7| 7| 7| 7| 6| 7| 6| 6| 5| 7| 7| 7| 4| 7| 7| 6| 6| 7| 5|            |
                             DAY ON TEST   | 3| 3| 3| 3| 3| 3| 3| 2| 3| 3| 1| 3| 4| 8| 1| 3| 3| 0| 9| 3| 3| 5| 3| 3| 7|            |
                                           | 3| 7| 3| 3| 3| 6| 6| 8| 6| 7| 4| 7| 2| 4| 6| 7| 7| 4| 1| 8| 8| 9| 2| 0| 9|            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     O      |
   FISCHER 344 RATS FEMALE                 | 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1|     T      |
                               ANIMAL ID   | 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 5| 5| 5| 5| 5|     A      |
    30 PPM                                 | 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 8| 8| 8| 8| 8| 9| 9| 9| 9| 9| 0| 0| 0| 0| 0|     L      |
     0-10                                  | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|            |
 __________________________________________________________________________________________________________________________________ 
 ALIMENTARY SYSTEM                         |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Esophagus                               | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
                                            __________________________________________________________________________|____________|
   Intestine Large                         | +  +  +  +  +  +  +  A  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  48        |
                                            __________________________________________________________________________|____________|
   Intestine Large, Cecum                  | +  +  +  +  +  +  +  A  +  +  +  +  +  +  M  +  +  +  +  +  +  +  +  +  +|  47        |
                                            __________________________________________________________________________|____________|
   Intestine Large, Colon                  | +  +  +  +  +  +  +  A  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  48        |
                                            __________________________________________________________________________|____________|
   Intestine Large, Rectum                 | +  +  +  +  M  +  +  A  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  47        |
                                            __________________________________________________________________________|____________|
   Intestine Small                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
                                            __________________________________________________________________________|____________|
   Intestine Small, Duodenum               | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
                                            __________________________________________________________________________|____________|
   Intestine Small, Ileum                  | +  +  +  +  +  +  +  A  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  47        |
                                            __________________________________________________________________________|____________|
   Intestine Small, Jejunum                | +  +  +  +  +  +  +  A  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  48        |
                                            __________________________________________________________________________|____________|
   Liver                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Hepatocellular Carcinoma             |                               X                             X        X   |          4 |
      Hepatocellular Adenoma               |                      X                                                   |          1 |
      Hepatocellular Adenoma, Multiple     | X     X  X     X  X     X  X     X  X  X     X  X  X     X  X  X  X  X   |         37 |
      Hepatocholangiocarcinoma             |                                                                          |          1 |
      Leukemia Mononuclear                 |    X     X        X     X     X  X     X  X  X  X  X  X  X     X     X  X|         22 |
                                            __________________________________________________________________________|____________|
   Pancreas                                | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Salivary Glands                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
                                            __________________________________________________________________________|____________|
   Stomach                                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
                                            __________________________________________________________________________|____________|
   Stomach, Forestomach                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +  +  +  +  +|  48        |
      Squamous Cell Papilloma              |                                                                X         |          1 |
                                            __________________________________________________________________________|____________|
   Stomach, Glandular                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
 _____________________________________________________________________________________________________________________|            |
 CARDIOVASCULAR SYSTEM                     |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Heart                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
      Leukemia Mononuclear                 |                                                                          |          1 |
 _____________________________________________________________________________________________________________________|            |
 ENDOCRINE SYSTEM                          |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Adrenal Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Adrenal Gland, Cortex                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 |                                           X                              |          2 |
      Bilateral, Adenoma                   |                                                             X            |          1 |
                                            __________________________________________________________________________|____________|
   Adrenal Gland, Medulla                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
      Leukemia Mononuclear                 |                                           X                              |          2 |
                                            __________________________________________________________________________|____________|
   Islets, Pancreatic                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
                                            __________________________________________________________________________|____________|
   Parathyroid Gland                       | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  M  +|  46        |
                                            __________________________________________________________________________|____________|
   Pituitary Gland                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Pars Distalis, Adenoma               |                         X                                                |          2 |
      Pars Distalis, Adenoma, Mild         |                                                                          |          1 |
      Pars Distalis, Adenoma, Moderate     |             X                                                            |          1 |
 __________________________________________________________________________________________________________________________________ 
                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  
                                                             Page  41                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 7| 5| 7| 7| 7| 7| 7| 7| 7| 7| 6| 7| 6| 6| 5| 7| 7| 7| 4| 7| 7| 6| 6| 7| 5|            |
                             DAY ON TEST   | 3| 3| 3| 3| 3| 3| 3| 2| 3| 3| 1| 3| 4| 8| 1| 3| 3| 0| 9| 3| 3| 5| 3| 3| 7|            |
                                           | 3| 7| 3| 3| 3| 6| 6| 8| 6| 7| 4| 7| 2| 4| 6| 7| 7| 4| 1| 8| 8| 9| 2| 0| 9|            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     O      |
   FISCHER 344 RATS FEMALE                 | 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1|     T      |
                               ANIMAL ID   | 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 5| 5| 5| 5| 5|     A      |
    30 PPM                                 | 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 8| 8| 8| 8| 8| 9| 9| 9| 9| 9| 0| 0| 0| 0| 0|     L      |
     0-10                                  | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|            |
 __________________________________________________________________________________________________________________________________ 
 ENDOCRINE SYSTEM - cont                   |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Thyroid Gland                           | +  +  +  +  +  +  +  A  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  48        |
      C-Cell, Adenoma                      |          X                    X                                          |          2 |
      C-Cell, Carcinoma                    | X                                                                        |          1 |
 _____________________________________________________________________________________________________________________|            |
 GENERAL BODY SYSTEM                       |                                                                          |            |
                                           |                                                                          |            |
    None                                   |                                                                          |            |
 _____________________________________________________________________________________________________________________|            |
 GENITAL SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Clitoral Gland                          | +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +  +  M  +  +  +  +  +  +|  47        |
      Carcinoma                            |          X                                                               |          1 |
                                            __________________________________________________________________________|____________|
   Ovary                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  48        |
      Leiomyosarcoma                       |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Uterus                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
      Polyp Stromal                        |       X        X                                X        X               |          7 |
 _____________________________________________________________________________________________________________________|            |
 HEMATOPOIETIC SYSTEM                      |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Bone Marrow                             | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  48        |
      Femoral, Leukemia Mononuclear        |                                                                X         |          3 |
                                            __________________________________________________________________________|____________|
   Lymph Node                              | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
      Mandibular, Leukemia Mononuclear     |                   X  X  X     X        X  X        X  X  X     X         |         13 |
      Mediastinal, Leukemia Mononuclear    |    X                                   X  X                              |          4 |
      Pancreatic, Leukemia Mononuclear     |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Lymph Node, Mesenteric                  | +                          +           +  +                          +   |   5        |
      Leukemia Mononuclear                 |                                        X  X                              |          2 |
                                            __________________________________________________________________________|____________|
   Lymph Node, Thoracic                    | +                          +                                             |   2        |
                                            __________________________________________________________________________|____________|
   Spleen                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 |    X     X        X  X  X     X  X     X  X  X     X  X  X     X     X  X|         21 |
                                            __________________________________________________________________________|____________|
   Thymus                                  | +  +  M  +  I  +  M  +  M  +  +  +  +  +  +  M  +  +  +  +  +  +  +  +  +|  41        |
      Leukemia Mononuclear                 |                               X           X                              |          3 |
 _____________________________________________________________________________________________________________________|            |
 INTEGUMENTARY SYSTEM                      |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Mammary Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  M  +|  49        |
      Fibroadenoma                         |             X                                                            |          1 |
      Fibroadenoma, Multiple               |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Skin                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
      Squamous Cell Papilloma              |                                                                          |          1 |
      Subcutaneous Tissue, Lipoma          |       X                                                                  |          1 |
 _____________________________________________________________________________________________________________________|            |
 MUSCULOSKELETAL SYSTEM                    |                                                                          |            |
                                           |                                                                          |            |
 __________________________________________________________________________________________________________________________________ 
                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  
                                                             Page  42                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 7| 5| 7| 7| 7| 7| 7| 7| 7| 7| 6| 7| 6| 6| 5| 7| 7| 7| 4| 7| 7| 6| 6| 7| 5|            |
                             DAY ON TEST   | 3| 3| 3| 3| 3| 3| 3| 2| 3| 3| 1| 3| 4| 8| 1| 3| 3| 0| 9| 3| 3| 5| 3| 3| 7|            |
                                           | 3| 7| 3| 3| 3| 6| 6| 8| 6| 7| 4| 7| 2| 4| 6| 7| 7| 4| 1| 8| 8| 9| 2| 0| 9|            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     O      |
   FISCHER 344 RATS FEMALE                 | 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1|     T      |
                               ANIMAL ID   | 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 5| 5| 5| 5| 5|     A      |
    30 PPM                                 | 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 8| 8| 8| 8| 8| 9| 9| 9| 9| 9| 0| 0| 0| 0| 0|     L      |
     0-10                                  | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|            |
 __________________________________________________________________________________________________________________________________ 
 MUSCULOSKELETAL SYSTEM - cont             |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Bone                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
 _____________________________________________________________________________________________________________________|            |
 NERVOUS SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Brain                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
 _____________________________________________________________________________________________________________________|            |
 RESPIRATORY SYSTEM                        |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Lung                                    | +  +  +  +     +  +  +  +  M  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  47        |
      Alveolar/Bronchiolar Adenoma         |       X                                                                  |          2 |
      Hepatocellular Carcinoma, Metastatic,|                                                                          |            |
           Liver                           |                                                                      X   |          1 |
      Leukemia Mononuclear                 |    X                 X        X        X  X        X  X        X     X  X|         13 |
      Squamous Cell Carcinoma, Metastatic, |                                                                          |            |
           Clitoral Gland                  |          X                                                               |          1 |
                                            __________________________________________________________________________|____________|
   Nose                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  48        |
                                            __________________________________________________________________________|____________|
   Trachea                                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
 _____________________________________________________________________________________________________________________|            |
 SPECIAL SENSES SYSTEM                     |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Eye                                     |                                                                          |   2        |
 _____________________________________________________________________________________________________________________|            |
 URINARY SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Kidney                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 |                                           X                              |          2 |
                                            __________________________________________________________________________|____________|
   Urinary Bladder                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
 __________________________________________________________________________________________________________________________________ 
 SYSTEMIC LESIONS                          |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Multiple Organs                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 |    X     X        X  X  X     X  X     X  X  X  X  X  X  X     X     X  X|         23 |
 __________________________________________________________________________________________________________________________________ 
                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  
                                                             Page  43                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 7| 7| 5| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 6| 6| 7| 7| 6| 7| 7| 7| 5| 6| 7| 7|             
                             DAY ON TEST   | 2| 2| 7| 2| 2| 0| 3| 3| 3| 3| 1| 3| 3| 8| 7| 3| 3| 9| 3| 3| 3| 9| 3| 3| 3|             
                                           | 9| 9| 7| 9| 9| 6| 0| 0| 0| 0| 0| 1| 1| 2| 4| 1| 1| 5| 1| 2| 2| 9| 3| 2| 2|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   FISCHER 344 RATS FEMALE                 | 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1|             
                               ANIMAL ID   | 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5|             
    30 PPM                                 | 1| 1| 1| 1| 1| 2| 2| 2| 2| 2| 3| 3| 3| 3| 3| 4| 4| 4| 4| 4| 5| 5| 5| 5| 5|             
     10-10                                 | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|             
 _____________________________________________________________________________________________________________________|             
 ALIMENTARY SYSTEM                         |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Esophagus                               | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Large                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Large, Cecum                  | +  +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Large, Colon                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Large, Rectum                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Small                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Small, Duodenum               | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Small, Ileum                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Small, Jejunum                | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Liver                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Hepatocellular Carcinoma             |          X     X  X                 X     X  X     X           X         |             
      Hepatocellular Carcinoma, Multiple   |                            X  X                       X                  |             
      Hepatocellular Adenoma               |                                                                          |             
      Hepatocellular Adenoma, Multiple     | X  X  X  X  X     X  X  X  X  X  X  X     X  X  X  X  X  X  X  X     X  X|             
      Leukemia Mononuclear                 |       X        X  X  X     X  X        X  X                    X  X  X  X|             
                                            __________________________________________________________________________|             
   Pancreas                                | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                   X      |             
                                            __________________________________________________________________________|             
   Salivary Glands                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Stomach                                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Stomach, Forestomach                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Stomach, Glandular                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             
 CARDIOVASCULAR SYSTEM                     |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Heart                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                               X                                   X      |             
 _____________________________________________________________________________________________________________________|             
 ENDOCRINE SYSTEM                          |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Adrenal Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Adrenal Gland, Cortex                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |                                                                          |             
      Leukemia Mononuclear                 |                                        X                          X      |             
                                            __________________________________________________________________________|             
   Adrenal Gland, Medulla                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                        X                          X      |             
                                            __________________________________________________________________________|             
   Islets, Pancreatic                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Parathyroid Gland                       | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Pituitary Gland                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Pars Distalis, Adenoma               |             X                                         X  X  X            |             
                                            __________________________________________________________________________|             
   Thyroid Gland                           | +  +  +  +  +  A  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Bilateral, C-Cell, Adenoma           |                                                                         X|             
      C-Cell, Adenoma                      |          X           X        X           X              X           X   |             
 _____________________________________________________________________________________________________________________|             
 GENERAL BODY SYSTEM                       |                                                                          |             
                                           |                                                                          |             
    None                                   |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 GENITAL SYSTEM                            |                                                                          |             
 _____________________________________________________________________________________________________________________|             
                                                             Page  44                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 7| 7| 5| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 6| 6| 7| 7| 6| 7| 7| 7| 5| 6| 7| 7|             
                             DAY ON TEST   | 2| 2| 7| 2| 2| 0| 3| 3| 3| 3| 1| 3| 3| 8| 7| 3| 3| 9| 3| 3| 3| 9| 3| 3| 3|             
                                           | 9| 9| 7| 9| 9| 6| 0| 0| 0| 0| 0| 1| 1| 2| 4| 1| 1| 5| 1| 2| 2| 9| 3| 2| 2|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   FISCHER 344 RATS FEMALE                 | 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1|             
                               ANIMAL ID   | 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5|             
    30 PPM                                 | 1| 1| 1| 1| 1| 2| 2| 2| 2| 2| 3| 3| 3| 3| 3| 4| 4| 4| 4| 4| 5| 5| 5| 5| 5|             
     10-10                                 | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|             
 _____________________________________________________________________________________________________________________|             
 GENITAL SYSTEM - cont                     |                                                                          |             
                                           |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Clitoral Gland                          | +  +  +  +  +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +  +  +  +  +|             
      Carcinoma                            |                                                                          |             
                                            __________________________________________________________________________|             
   Ovary                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                X              X                                          |             
                                            __________________________________________________________________________|             
   Oviduct                                 |                                                                          |             
                                            __________________________________________________________________________|             
   Uterus                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenocarcinoma                       |                                                                         X|             
      Leiomyosarcoma                       |                                                                          |             
      Polyp Stromal                        |    X              X                                                     X|             
      Sarcoma Stromal                      |                                           X                              |             
                                            __________________________________________________________________________|             
   Vagina                                  |                                                                          |             
      Leiomyosarcoma                       |                                                                          |             
      Polyp                                |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 HEMATOPOIETIC SYSTEM                      |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Blood                                   |                                                                          |             
                                            __________________________________________________________________________|             
   Bone Marrow                             | +  +  +  +  +  +  +  +  +  +  +  I  +  +  +  +  +  I  +  +  +  +  +  +  +|             
      Femoral, Leukemia Mononuclear        |                X              X                                X  X      |             
                                            __________________________________________________________________________|             
   Lymph Node                              | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +     M  +  +  +  +  +  +|             
      Mandibular, Leukemia Mononuclear     |                X              X        X  X                    X     X   |             
      Mandibular, Lymphoma Malignant       |                                                                          |             
          Histiocytic                      |                                     X                                    |             
      Mediastinal, Leukemia Mononuclear    |                X                                                         |             
                                            __________________________________________________________________________|             
   Spleen                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |       X        X  X        X  X        X  X                    X  X  X  X|             
                                            __________________________________________________________________________|             
   Thymus                                  | +  +  +  +  +  M  +  +  M  +  +  +  +  +  +  M  +  +  M  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                   X      |             
 _____________________________________________________________________________________________________________________|             
 INTEGUMENTARY SYSTEM                      |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Mammary Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |                                                             X            |             
      Fibroadenoma                         |                                                    X                     |             
                                            __________________________________________________________________________|             
   Skin                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Subcutaneous Tissue, Lipoma          |                                                                      X   |             
 _____________________________________________________________________________________________________________________|             
 MUSCULOSKELETAL SYSTEM                    |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Bone                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             
 NERVOUS SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Brain                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             
 RESPIRATORY SYSTEM                        |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Lung                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             
                                                             Page  45                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 7| 7| 5| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 6| 6| 7| 7| 6| 7| 7| 7| 5| 6| 7| 7|             
                             DAY ON TEST   | 2| 2| 7| 2| 2| 0| 3| 3| 3| 3| 1| 3| 3| 8| 7| 3| 3| 9| 3| 3| 3| 9| 3| 3| 3|             
                                           | 9| 9| 7| 9| 9| 6| 0| 0| 0| 0| 0| 1| 1| 2| 4| 1| 1| 5| 1| 2| 2| 9| 3| 2| 2|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   FISCHER 344 RATS FEMALE                 | 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1|             
                               ANIMAL ID   | 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5|             
    30 PPM                                 | 1| 1| 1| 1| 1| 2| 2| 2| 2| 2| 3| 3| 3| 3| 3| 4| 4| 4| 4| 4| 5| 5| 5| 5| 5|             
     10-10                                 | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|             
 _____________________________________________________________________________________________________________________|             
 RESPIRATORY SYSTEM - cont                 |                                                                          |             
                                           |                                                                          |             
      Leukemia Mononuclear                 |       X        X              X        X  X                    X  X      |             
      Squamous Cell Carcinoma, Multiple,   |                                                                          |             
           Metastatic, Uncertain Primary   |                                                                          |             
          Site                             |                                                                         X|             
                                            __________________________________________________________________________|             
   Nose                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Trachea                                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +     +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             
 SPECIAL SENSES SYSTEM                     |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Eye                                     |                      +                 +                                 |             
 _____________________________________________________________________________________________________________________|             
 URINARY SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Kidney                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                X              X                                          |             
      Transitional Epithelium, Carcinoma   |                                                                          |             
                                            __________________________________________________________________________|             
   Urinary Bladder                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Papilloma                            |                                           X                              |             
 _____________________________________________________________________________________________________________________|             
 SYSTEMIC LESIONS                          |                                                                          |             
                                            __________________________________________________________________________|             
   Multiple Organs                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |       X        X  X  X     X  X        X  X                    X  X  X  X|             
      Lymphoma Malignant Histiocytic       |                                     X                                    |             
 _____________________________________________________________________________________________________________________|             
                                                             Page  46                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 7| 6| 7| 6| 7| 7| 7| 5| 7| 3| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 5| 7|            |
                             DAY ON TEST   | 3| 8| 1| 8| 3| 3| 3| 6| 3| 1| 3| 3| 3| 3| 2| 3| 3| 3| 0| 0| 3| 3| 3| 4| 3|            |
                                           | 3| 2| 6| 4| 3| 6| 6| 2| 6| 2| 6| 6| 7| 7| 4| 7| 7| 8| 4| 7| 8| 8| 8| 3| 8|            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     O      |
   FISCHER 344 RATS FEMALE                 | 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1|     T      |
                               ANIMAL ID   | 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 6| 6| 6| 6| 6|     A      |
    30 PPM                                 | 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 8| 8| 8| 8| 8| 9| 9| 9| 9| 9| 0| 0| 0| 0| 0|     L      |
     10-10                                 | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|            |
 __________________________________________________________________________________________________________________________________ 
 ALIMENTARY SYSTEM                         |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Esophagus                               | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Intestine Large                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Intestine Large, Cecum                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
                                            __________________________________________________________________________|____________|
   Intestine Large, Colon                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Intestine Large, Rectum                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  M  +|  49        |
                                            __________________________________________________________________________|____________|
   Intestine Small                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Intestine Small, Duodenum               | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Intestine Small, Ileum                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Intestine Small, Jejunum                | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Liver                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Hepatocellular Carcinoma             |          X     X                    X  X           X           X  X     X|         16 |
      Hepatocellular Carcinoma, Multiple   |                                              X        X  X               |          6 |
      Hepatocellular Adenoma               |                            X                                             |          1 |
      Hepatocellular Adenoma, Multiple     | X  X  X  X  X  X  X     X     X  X  X  X  X  X  X     X  X  X  X  X  X  X|         44 |
      Leukemia Mononuclear                 |                   X  X  X           X     X     X  X  X  X     X  X  X   |         24 |
                                            __________________________________________________________________________|____________|
   Pancreas                                | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Salivary Glands                         | +  +  +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
                                            __________________________________________________________________________|____________|
   Stomach                                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Stomach, Forestomach                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Stomach, Glandular                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
 _____________________________________________________________________________________________________________________|            |
 CARDIOVASCULAR SYSTEM                     |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Heart                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 |                                           X                              |          3 |
 _____________________________________________________________________________________________________________________|            |
 ENDOCRINE SYSTEM                          |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Adrenal Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Adrenal Gland, Cortex                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Adenoma                              |                                                    X                     |          1 |
      Leukemia Mononuclear                 |    X                 X                    X                              |          5 |
                                            __________________________________________________________________________|____________|
   Adrenal Gland, Medulla                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +     +  +|  49        |
      Leukemia Mononuclear                 |    X                 X                    X                              |          5 |
                                            __________________________________________________________________________|____________|
   Islets, Pancreatic                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Parathyroid Gland                       | +  +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
                                            __________________________________________________________________________|____________|
   Pituitary Gland                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Pars Distalis, Adenoma               |                                                 X                        |          5 |
                                            __________________________________________________________________________|____________|
   Thyroid Gland                           | +  +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +  +  +  +  +  +  +  +|  48        |
      Bilateral, C-Cell, Adenoma           |                                                                          |          1 |
 __________________________________________________________________________________________________________________________________ 
                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  
                                                             Page  47                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 7| 6| 7| 6| 7| 7| 7| 5| 7| 3| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 5| 7|            |
                             DAY ON TEST   | 3| 8| 1| 8| 3| 3| 3| 6| 3| 1| 3| 3| 3| 3| 2| 3| 3| 3| 0| 0| 3| 3| 3| 4| 3|            |
                                           | 3| 2| 6| 4| 3| 6| 6| 2| 6| 2| 6| 6| 7| 7| 4| 7| 7| 8| 4| 7| 8| 8| 8| 3| 8|            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     O      |
   FISCHER 344 RATS FEMALE                 | 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1|     T      |
                               ANIMAL ID   | 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 6| 6| 6| 6| 6|     A      |
    30 PPM                                 | 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 8| 8| 8| 8| 8| 9| 9| 9| 9| 9| 0| 0| 0| 0| 0|     L      |
     10-10                                 | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|            |
 __________________________________________________________________________________________________________________________________ 
 ENDOCRINE SYSTEM - cont                   |                                                                          |            |
                                           |                                                                          |            |
      C-Cell, Adenoma                      |                                                    X                     |          7 |
 _____________________________________________________________________________________________________________________|            |
 GENERAL BODY SYSTEM                       |                                                                          |            |
                                           |                                                                          |            |
    None                                   |                                                                          |            |
 _____________________________________________________________________________________________________________________|            |
 GENITAL SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Clitoral Gland                          | +  M  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +  +  +  +  M  +  +  +|  46        |
      Carcinoma                            |                                                                         X|          1 |
                                            __________________________________________________________________________|____________|
   Ovary                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
      Leukemia Mononuclear                 |                                                                          |          2 |
                                            __________________________________________________________________________|____________|
   Oviduct                                 |                            +                                             |   1        |
                                            __________________________________________________________________________|____________|
   Uterus                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Adenocarcinoma                       |                                                                          |          1 |
      Leiomyosarcoma                       |    X                                                                     |          1 |
      Polyp Stromal                        |                               X                                          |          4 |
      Sarcoma Stromal                      |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Vagina                                  |    +                                                                 +   |   2        |
      Leiomyosarcoma                       |    X                                                                     |          1 |
      Polyp                                |                                                                      X   |          1 |
 _____________________________________________________________________________________________________________________|            |
 HEMATOPOIETIC SYSTEM                      |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Blood                                   |                                        +                                 |   1        |
                                            __________________________________________________________________________|____________|
   Bone Marrow                             | +  +  A  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  47        |
      Femoral, Leukemia Mononuclear        |                      X                    X     X                        |          7 |
                                            __________________________________________________________________________|____________|
   Lymph Node                              | +  +  +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +  +  +  +  +  +  +|  47        |
      Mandibular, Leukemia Mononuclear     |                   X                             X        X     X  X  X   |         12 |
      Mandibular, Lymphoma Malignant       |                                                                          |            |
          Histiocytic                      |                                                                          |          1 |
      Mediastinal, Leukemia Mononuclear    |                                                 X                        |          2 |
                                            __________________________________________________________________________|____________|
   Spleen                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 |    X              X  X  X           X     X     X  X  X  X     X  X  X   |         24 |
                                            __________________________________________________________________________|____________|
   Thymus                                  | +  M  M  +  +  M  +  +  M  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  42        |
      Leukemia Mononuclear                 |                                                                          |          1 |
 _____________________________________________________________________________________________________________________|            |
 INTEGUMENTARY SYSTEM                      |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Mammary Gland                           | +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +  +  +  M  +  +  +  +  +|  48        |
      Adenoma                              |                                                                          |          1 |
      Fibroadenoma                         |    X                             X                 X                     |          4 |
                                            __________________________________________________________________________|____________|
   Skin                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
 __________________________________________________________________________________________________________________________________ 
                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  
                                                             Page  48                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 7| 6| 7| 6| 7| 7| 7| 5| 7| 3| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 5| 7|            |
                             DAY ON TEST   | 3| 8| 1| 8| 3| 3| 3| 6| 3| 1| 3| 3| 3| 3| 2| 3| 3| 3| 0| 0| 3| 3| 3| 4| 3|            |
                                           | 3| 2| 6| 4| 3| 6| 6| 2| 6| 2| 6| 6| 7| 7| 4| 7| 7| 8| 4| 7| 8| 8| 8| 3| 8|            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     O      |
   FISCHER 344 RATS FEMALE                 | 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1|     T      |
                               ANIMAL ID   | 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 6| 6| 6| 6| 6|     A      |
    30 PPM                                 | 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 8| 8| 8| 8| 8| 9| 9| 9| 9| 9| 0| 0| 0| 0| 0|     L      |
     10-10                                 | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|            |
 __________________________________________________________________________________________________________________________________ 
 INTEGUMENTARY SYSTEM - cont               |                                                                          |            |
                                           |                                                                          |            |
      Subcutaneous Tissue, Lipoma          |                                                                          |          1 |
 _____________________________________________________________________________________________________________________|            |
 MUSCULOSKELETAL SYSTEM                    |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Bone                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
 _____________________________________________________________________________________________________________________|            |
 NERVOUS SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Brain                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
 _____________________________________________________________________________________________________________________|            |
 RESPIRATORY SYSTEM                        |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Lung                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 |                      X              X     X     X  X  X  X               |         14 |
      Squamous Cell Carcinoma, Multiple,   |                                                                          |            |
           Metastatic, Uncertain Primary   |                                                                          |            |
          Site                             |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Nose                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Trachea                                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
 _____________________________________________________________________________________________________________________|            |
 SPECIAL SENSES SYSTEM                     |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Eye                                     |             +     +                                               +      |   5        |
 _____________________________________________________________________________________________________________________|            |
 URINARY SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Kidney                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 |                                           X                              |          3 |
      Transitional Epithelium, Carcinoma   |                            X                                             |          1 |
                                            __________________________________________________________________________|____________|
   Urinary Bladder                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Papilloma                            |                                                                          |          1 |
 __________________________________________________________________________________________________________________________________ 
 SYSTEMIC LESIONS                          |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Multiple Organs                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 |    X              X  X  X           X     X     X  X  X  X     X  X  X   |         25 |
      Lymphoma Malignant Histiocytic       |                                                                          |          1 |
 __________________________________________________________________________________________________________________________________ 
                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  
                                                             Page  49                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 7| 7| 7| 6| 7| 7| 6| 5| 7| 7| 6| 7| 7| 7| 7| 6| 6| 7| 6| 7| 7| 7| 7| 5| 7|             
                             DAY ON TEST   | 1| 2| 1| 5| 2| 2| 7| 5| 2| 0| 9| 2| 1| 2| 2| 5| 7| 2| 9| 2| 2| 2| 3| 7| 3|             
                                           | 4| 7| 3| 1| 7| 7| 5| 5| 8| 6| 4| 8| 0| 8| 8| 1| 1| 9| 9| 9| 9| 9| 0| 6| 0|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   FISCHER 344 RATS MALE                   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
                               ANIMAL ID   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
    0 PPM                                  | 1| 1| 1| 1| 1| 2| 2| 2| 2| 2| 3| 3| 3| 3| 3| 4| 4| 4| 4| 4| 5| 5| 5| 5| 5|             
    0-0                                    | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|             
 _____________________________________________________________________________________________________________________|             
 ALIMENTARY SYSTEM                         |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Esophagus                               | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Large                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Large, Cecum                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +     +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Large, Colon                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +     +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Large, Rectum                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +     +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Small                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Small, Duodenum               | A  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +     +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Small, Ileum                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +     +  +  +  +  +  +|             
      Adenocarcinoma                       |                                                                          |             
                                            __________________________________________________________________________|             
   Intestine Small, Jejunum                | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +     +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Liver                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Fibrosarcoma, Metastatic, Skin       |                                                                          |             
      Hepatocellular Adenoma               |                                                                         X|             
      Leukemia Mononuclear                 | X           X              X  X  X  X  X  X     X     X     X  X         |             
                                            __________________________________________________________________________|             
   Pancreas                                | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |             X                                                            |             
      Acinus, Adenoma                      |                X                                                         |             
                                            __________________________________________________________________________|             
   Salivary Glands                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Schwannoma Malignant                 |                         X                                                |             
                                            __________________________________________________________________________|             
   Stomach                                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Stomach, Forestomach                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Stomach, Glandular                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             
 CARDIOVASCULAR SYSTEM                     |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Heart                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             
 ENDOCRINE SYSTEM                          |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Adrenal Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Adrenal Gland, Cortex                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |       X     X              X        X           X                        |             
                                            __________________________________________________________________________|             
   Adrenal Gland, Medulla                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +     +  +|             
      Leukemia Mononuclear                 |       X     X              X        X           X                        |             
      Pheochromocytoma Malignant           |                            X                                             |             
      Pheochromocytoma Benign              |       X                    X                    X                        |             
      Bilateral, Pheochromocytoma Benign   |          X                                                               |             
                                            __________________________________________________________________________|             
   Islets, Pancreatic                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |                X                                                         |             
      Carcinoma                            |    X                                                                     |             
                                            __________________________________________________________________________|             
   Parathyroid Gland                       | +  M  +  +  M  +  +  +  +  +  +  +  +  +  +  +  +  M  +  M  +  M  +  +  +|             
                                            __________________________________________________________________________|             
   Pituitary Gland                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Pars Distalis, Adenoma               |    X           X  X     X  X                          X  X               |             
      Pars Distalis, Leukemia Mononuclear  |       X                       X     X                 X                  |             
                                            __________________________________________________________________________|             
   Thyroid Gland                           | +  +  +  +  +  +  +  A  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             
                                                             Page  50                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 7| 7| 7| 6| 7| 7| 6| 5| 7| 7| 6| 7| 7| 7| 7| 6| 6| 7| 6| 7| 7| 7| 7| 5| 7|             
                             DAY ON TEST   | 1| 2| 1| 5| 2| 2| 7| 5| 2| 0| 9| 2| 1| 2| 2| 5| 7| 2| 9| 2| 2| 2| 3| 7| 3|             
                                           | 4| 7| 3| 1| 7| 7| 5| 5| 8| 6| 4| 8| 0| 8| 8| 1| 1| 9| 9| 9| 9| 9| 0| 6| 0|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   FISCHER 344 RATS MALE                   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
                               ANIMAL ID   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
    0 PPM                                  | 1| 1| 1| 1| 1| 2| 2| 2| 2| 2| 3| 3| 3| 3| 3| 4| 4| 4| 4| 4| 5| 5| 5| 5| 5|             
    0-0                                    | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|             
 _____________________________________________________________________________________________________________________|             
 ENDOCRINE SYSTEM - cont                   |                                                                          |             
                                           |                                                                          |             
      Bilateral, C-Cell, Adenoma           |                                                             X            |             
      C-Cell, Adenoma                      |       X  X        X     X        X        X  X        X  X     X         |             
      C-Cell, Carcinoma                    |                                                          X               |             
      Follicular Cell, Adenoma             |                                     X                                    |             
 _____________________________________________________________________________________________________________________|             
 GENERAL BODY SYSTEM                       |                                                                          |             
                                           |                                                                          |             
    None                                   |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 GENITAL SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Epididymis                              | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Mesothelioma Malignant               |                                  X                                       |             
      Serosa, Mesothelioma Benign          |                                                                          |             
                                            __________________________________________________________________________|             
   Preputial Gland                         | +  +  +  +  +  +  +  +  +     +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |                                     X                                    |             
      Carcinoma                            |                                           X                    X         |             
      Duct, Squamous Cell Papilloma        |                                                                          |             
                                            __________________________________________________________________________|             
   Prostate                                | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Testes                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Bilateral, Interstitial Cell, Adenoma| X  X  X     X     X  X  X  X  X  X  X  X  X     X  X     X  X  X  X     X|             
      Interstitial Cell, Adenoma           |          X     X                             X                       X   |             
      Tunic, Mesothelioma Benign           |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 HEMATOPOIETIC SYSTEM                      |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Bone Marrow                             | +  +  +     +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Femoral, Leukemia Mononuclear        |                            X  X     X           X                        |             
                                            __________________________________________________________________________|             
   Lymph Node                              | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Inguinal, Leukemia Mononuclear       |                                     X                          X         |             
      Mandibular, Leukemia Mononuclear     |       X                    X  X  X  X     X           X                  |             
      Mediastinal, Leukemia Mononuclear    |                                  X  X                                    |             
                                            __________________________________________________________________________|             
   Lymph Node, Mesenteric                  |                                                                      +   |             
      Fibrosarcoma, Metastatic, Skin       |                                                                          |             
      Osteosarcoma, Metastatic, Uncertain  |                                                                          |             
          Primary Site                     |                                                                      X   |             
                                            __________________________________________________________________________|             
   Spleen                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X     X     X     X        X  X  X  X  X  X     X     X  X  X  X         |             
                                            __________________________________________________________________________|             
   Thymus                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  M  +  +  +|             
      Leukemia Mononuclear                 |                               X     X                 X                  |             
 _____________________________________________________________________________________________________________________|             
 INTEGUMENTARY SYSTEM                      |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Mammary Gland                           |       +  +  +  +  +  +  +  +     +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Fibroadenoma                         |                                                             X            |             
                                            __________________________________________________________________________|             
   Skin                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Keratoacanthoma                      |                                                                          |             
      Squamous Cell Papilloma              |                                                                          |             
 _____________________________________________________________________________________________________________________|             
                                                             Page  51                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 7| 7| 7| 6| 7| 7| 6| 5| 7| 7| 6| 7| 7| 7| 7| 6| 6| 7| 6| 7| 7| 7| 7| 5| 7|             
                             DAY ON TEST   | 1| 2| 1| 5| 2| 2| 7| 5| 2| 0| 9| 2| 1| 2| 2| 5| 7| 2| 9| 2| 2| 2| 3| 7| 3|             
                                           | 4| 7| 3| 1| 7| 7| 5| 5| 8| 6| 4| 8| 0| 8| 8| 1| 1| 9| 9| 9| 9| 9| 0| 6| 0|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   FISCHER 344 RATS MALE                   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
                               ANIMAL ID   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
    0 PPM                                  | 1| 1| 1| 1| 1| 2| 2| 2| 2| 2| 3| 3| 3| 3| 3| 4| 4| 4| 4| 4| 5| 5| 5| 5| 5|             
    0-0                                    | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|             
 _____________________________________________________________________________________________________________________|             
 INTEGUMENTARY SYSTEM - cont               |                                                                          |             
                                           |                                                                          |             
      Subcutaneous Tissue, Fibroma         |                X                       X     X                           |             
      Subcutaneous Tissue, Fibroma,        |                                                                          |             
          Multiple                         |                                                                          |             
      Subcutaneous Tissue, Fibrosarcoma    |                                                                          |             
      Subcutaneous Tissue, Leukemia        |                                                                          |             
          Mononuclear                      |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 MUSCULOSKELETAL SYSTEM                    |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Bone                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             
 NERVOUS SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Brain                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Peripheral Nerve                        |                                                                          |             
                                            __________________________________________________________________________|             
   Spinal Cord                             |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 RESPIRATORY SYSTEM                        |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Lung                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Alveolar/Bronchiolar Adenoma         |                                           X                              |             
      Leukemia Mononuclear                 |       X     X              X  X  X  X           X     X        X         |             
      Osteosarcoma, Metastatic, Uncertain  |                                                                          |             
          Primary Site                     |                                                                      X   |             
                                            __________________________________________________________________________|             
   Nose                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Trachea                                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             
 SPECIAL SENSES SYSTEM                     |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Zymbal's Gland                          |                                              +                           |             
      Carcinoma                            |                                              X                           |             
 _____________________________________________________________________________________________________________________|             
 URINARY SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Kidney                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |       X                             X                    X               |             
      Medulla, Sarcoma                     |                                           X                              |             
      Renal Tubule, Carcinoma              |                                                                          |             
                                            __________________________________________________________________________|             
   Urinary Bladder                         | +  +  +  +  +  +  +  +  +     +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             
 SYSTEMIC LESIONS                          |                                                                          |             
                                            __________________________________________________________________________|             
   Multiple Organs                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X     X     X     X        X  X  X  X  X  X     X     X  X  X  X         |             
      Mesothelioma Benign                  |                                                                          |             
      Mesothelioma Malignant               |                                  X                                       |             
 _____________________________________________________________________________________________________________________|             
                                                             Page  52                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 7| 6| 6| 7| 7| 7| 7| 5| 7| 7| 7| 7| 7| 6| 6| 7| 7| 7| 5| 7| 7| 7| 7| 6| 5|            |
                             DAY ON TEST   | 3| 8| 9| 3| 0| 3| 3| 0| 3| 3| 3| 3| 3| 5| 7| 3| 3| 3| 0| 3| 3| 3| 3| 9| 7|            |
                                           | 0| 6| 3| 0| 2| 1| 1| 7| 1| 1| 4| 4| 4| 7| 6| 4| 5| 5| 5| 5| 6| 6| 6| 4| 1|            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     O      |
   FISCHER 344 RATS MALE                   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     T      |
                               ANIMAL ID   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 1| 1| 1| 1| 1|     A      |
    0 PPM                                  | 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 8| 8| 8| 8| 8| 9| 9| 9| 9| 9| 0| 0| 0| 0| 0|     L      |
    0-0                                    | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|            |
 __________________________________________________________________________________________________________________________________ 
 ALIMENTARY SYSTEM                         |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Esophagus                               | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Intestine Large                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Intestine Large, Cecum                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  A|  48        |
                                            __________________________________________________________________________|____________|
   Intestine Large, Colon                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
                                            __________________________________________________________________________|____________|
   Intestine Large, Rectum                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
                                            __________________________________________________________________________|____________|
   Intestine Small                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Intestine Small, Duodenum               | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  48        |
                                            __________________________________________________________________________|____________|
   Intestine Small, Ileum                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
      Adenocarcinoma                       |                   X                                                      |          1 |
                                            __________________________________________________________________________|____________|
   Intestine Small, Jejunum                | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
                                            __________________________________________________________________________|____________|
   Liver                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Fibrosarcoma, Metastatic, Skin       |                                                                         X|          1 |
      Hepatocellular Adenoma               |                                                                          |          1 |
      Leukemia Mononuclear                 |    X  X     X                                   X  X  X  X  X  X     X   |         22 |
                                            __________________________________________________________________________|____________|
   Pancreas                                | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  A|  49        |
      Leukemia Mononuclear                 |                                                                          |          1 |
      Acinus, Adenoma                      |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Salivary Glands                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Schwannoma Malignant                 |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Stomach                                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Stomach, Forestomach                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 |                                                       X                  |          1 |
                                            __________________________________________________________________________|____________|
   Stomach, Glandular                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
 _____________________________________________________________________________________________________________________|            |
 CARDIOVASCULAR SYSTEM                     |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Heart                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
 _____________________________________________________________________________________________________________________|            |
 ENDOCRINE SYSTEM                          |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Adrenal Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Adrenal Gland, Cortex                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 |       X     X                                   X  X                 X   |         10 |
                                            __________________________________________________________________________|____________|
   Adrenal Gland, Medulla                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
      Leukemia Mononuclear                 |       X     X                                   X  X                 X   |         10 |
      Pheochromocytoma Malignant           |                                                                          |          1 |
      Pheochromocytoma Benign              |    X     X     X        X        X                 X           X     X   |         11 |
      Bilateral, Pheochromocytoma Benign   |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Islets, Pancreatic                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  A|  49        |
      Adenoma                              |                X     X                                         X         |          4 |
      Carcinoma                            |                               X  X                                       |          3 |
 __________________________________________________________________________________________________________________________________ 
                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  
                                                             Page  53                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 7| 6| 6| 7| 7| 7| 7| 5| 7| 7| 7| 7| 7| 6| 6| 7| 7| 7| 5| 7| 7| 7| 7| 6| 5|            |
                             DAY ON TEST   | 3| 8| 9| 3| 0| 3| 3| 0| 3| 3| 3| 3| 3| 5| 7| 3| 3| 3| 0| 3| 3| 3| 3| 9| 7|            |
                                           | 0| 6| 3| 0| 2| 1| 1| 7| 1| 1| 4| 4| 4| 7| 6| 4| 5| 5| 5| 5| 6| 6| 6| 4| 1|            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     O      |
   FISCHER 344 RATS MALE                   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     T      |
                               ANIMAL ID   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 1| 1| 1| 1| 1|     A      |
    0 PPM                                  | 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 8| 8| 8| 8| 8| 9| 9| 9| 9| 9| 0| 0| 0| 0| 0|     L      |
    0-0                                    | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|            |
 __________________________________________________________________________________________________________________________________ 
 ENDOCRINE SYSTEM - cont                   |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Parathyroid Gland                       | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  M  M  +  +  +  +  +  +  +|  43        |
                                            __________________________________________________________________________|____________|
   Pituitary Gland                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Pars Distalis, Adenoma               |                X                 X     X  X        X                 X   |         13 |
      Pars Distalis, Leukemia Mononuclear  |       X                                                  X               |          6 |
                                            __________________________________________________________________________|____________|
   Thyroid Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
      Bilateral, C-Cell, Adenoma           |                                                                          |          1 |
      C-Cell, Adenoma                      |    X           X           X     X     X        X                        |         16 |
      C-Cell, Carcinoma                    |                                                                          |          1 |
      Follicular Cell, Adenoma             |                                                                          |          1 |
 _____________________________________________________________________________________________________________________|            |
 GENERAL BODY SYSTEM                       |                                                                          |            |
                                           |                                                                          |            |
    None                                   |                                                                          |            |
 _____________________________________________________________________________________________________________________|            |
 GENITAL SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Epididymis                              | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Mesothelioma Malignant               |                                                                          |          1 |
      Serosa, Mesothelioma Benign          |                                  X                                       |          1 |
                                            __________________________________________________________________________|____________|
   Preputial Gland                         | +  +  +     +  +  +     +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  47        |
      Adenoma                              |                         X  X                                   X         |          4 |
      Carcinoma                            |                                                 X                        |          3 |
      Duct, Squamous Cell Papilloma        |                               X                                          |          1 |
                                            __________________________________________________________________________|____________|
   Prostate                                | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Testes                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Bilateral, Interstitial Cell, Adenoma| X  X  X  X  X  X  X  X  X  X  X     X  X  X  X  X  X  X  X  X     X  X  X|         43 |
      Interstitial Cell, Adenoma           |                                  X                             X         |          6 |
      Tunic, Mesothelioma Benign           |                                  X                                       |          1 |
 _____________________________________________________________________________________________________________________|            |
 HEMATOPOIETIC SYSTEM                      |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Bone Marrow                             | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
      Femoral, Leukemia Mononuclear        |             X                                   X     X                  |          7 |
                                            __________________________________________________________________________|____________|
   Lymph Node                              | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Inguinal, Leukemia Mononuclear       |                                                                          |          2 |
      Mandibular, Leukemia Mononuclear     |    X  X     X                                   X  X  X     X  X     X   |         16 |
      Mediastinal, Leukemia Mononuclear    |                                                                      X   |          3 |
                                            __________________________________________________________________________|____________|
   Lymph Node, Mesenteric                  |                                                                         +|   2        |
      Fibrosarcoma, Metastatic, Skin       |                                                                         X|          1 |
      Osteosarcoma, Metastatic, Uncertain  |                                                                          |            |
          Primary Site                     |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Spleen                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
 __________________________________________________________________________________________________________________________________ 
                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  
                                                             Page  54                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 7| 6| 6| 7| 7| 7| 7| 5| 7| 7| 7| 7| 7| 6| 6| 7| 7| 7| 5| 7| 7| 7| 7| 6| 5|            |
                             DAY ON TEST   | 3| 8| 9| 3| 0| 3| 3| 0| 3| 3| 3| 3| 3| 5| 7| 3| 3| 3| 0| 3| 3| 3| 3| 9| 7|            |
                                           | 0| 6| 3| 0| 2| 1| 1| 7| 1| 1| 4| 4| 4| 7| 6| 4| 5| 5| 5| 5| 6| 6| 6| 4| 1|            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     O      |
   FISCHER 344 RATS MALE                   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     T      |
                               ANIMAL ID   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 1| 1| 1| 1| 1|     A      |
    0 PPM                                  | 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 8| 8| 8| 8| 8| 9| 9| 9| 9| 9| 0| 0| 0| 0| 0|     L      |
    0-0                                    | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|            |
 __________________________________________________________________________________________________________________________________ 
 HEMATOPOIETIC SYSTEM - cont               |                                                                          |            |
                                           |                                                                          |            |
      Leukemia Mononuclear                 |    X  X     X                                   X  X  X  X  X  X     X   |         25 |
                                            __________________________________________________________________________|____________|
   Thymus                                  | +  +  +  +  +  +  +  +  M  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +|  47        |
      Leukemia Mononuclear                 |                                                                          |          3 |
 _____________________________________________________________________________________________________________________|            |
 INTEGUMENTARY SYSTEM                      |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Mammary Gland                           | +        +     +  +        +  +  +  +  +  +  +  +  +     +  +  +     +   |  39        |
      Fibroadenoma                         |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Skin                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Keratoacanthoma                      | X                 X                                                      |          2 |
      Squamous Cell Papilloma              |                                                                   X      |          1 |
      Subcutaneous Tissue, Fibroma         |                                                 X        X               |          5 |
      Subcutaneous Tissue, Fibroma,        |                                                                          |            |
          Multiple                         |                                              X                           |          1 |
      Subcutaneous Tissue, Fibrosarcoma    |                                        X                                X|          2 |
      Subcutaneous Tissue, Leukemia        |                                                                          |            |
          Mononuclear                      |    X                                                                     |          1 |
 _____________________________________________________________________________________________________________________|            |
 MUSCULOSKELETAL SYSTEM                    |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Bone                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
 _____________________________________________________________________________________________________________________|            |
 NERVOUS SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Brain                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Peripheral Nerve                        |                      +                 +                                 |   2        |
                                            __________________________________________________________________________|____________|
   Spinal Cord                             |                      +                 +                                 |   2        |
 _____________________________________________________________________________________________________________________|            |
 RESPIRATORY SYSTEM                        |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Lung                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Alveolar/Bronchiolar Adenoma         |                            X                                             |          2 |
      Leukemia Mononuclear                 |       X     X                                      X  X  X           X   |         15 |
      Osteosarcoma, Metastatic, Uncertain  |                                                                          |            |
          Primary Site                     |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Nose                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Trachea                                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
 _____________________________________________________________________________________________________________________|            |
 SPECIAL SENSES SYSTEM                     |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Zymbal's Gland                          |                                                                          |   1        |
      Carcinoma                            |                                                                          |          1 |
 _____________________________________________________________________________________________________________________|            |
 URINARY SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
 __________________________________________________________________________________________________________________________________ 
                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  
                                                             Page  55                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 7| 6| 6| 7| 7| 7| 7| 5| 7| 7| 7| 7| 7| 6| 6| 7| 7| 7| 5| 7| 7| 7| 7| 6| 5|            |
                             DAY ON TEST   | 3| 8| 9| 3| 0| 3| 3| 0| 3| 3| 3| 3| 3| 5| 7| 3| 3| 3| 0| 3| 3| 3| 3| 9| 7|            |
                                           | 0| 6| 3| 0| 2| 1| 1| 7| 1| 1| 4| 4| 4| 7| 6| 4| 5| 5| 5| 5| 6| 6| 6| 4| 1|            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     O      |
   FISCHER 344 RATS MALE                   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     T      |
                               ANIMAL ID   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 1| 1| 1| 1| 1|     A      |
    0 PPM                                  | 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 8| 8| 8| 8| 8| 9| 9| 9| 9| 9| 0| 0| 0| 0| 0|     L      |
    0-0                                    | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|            |
 __________________________________________________________________________________________________________________________________ 
 URINARY SYSTEM - cont                     |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Kidney                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 |                                                       X              X   |          5 |
      Medulla, Sarcoma                     |                                                                          |          1 |
      Renal Tubule, Carcinoma              | X                                                                        |          1 |
                                            __________________________________________________________________________|____________|
   Urinary Bladder                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
 __________________________________________________________________________________________________________________________________ 
 SYSTEMIC LESIONS                          |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Multiple Organs                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 |    X  X     X                                   X  X  X  X  X  X     X   |         25 |
      Mesothelioma Benign                  |                                  X                                       |          1 |
      Mesothelioma Malignant               |                                                                          |          1 |
 __________________________________________________________________________________________________________________________________ 
                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  
                                                             Page  56                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 7| 7| 7| 7| 6| 7| 5| 7| 7| 6| 5| 7| 7| 7| 5| 5| 7| 7| 7| 6| 6| 7| 7| 7| 7|             
                             DAY ON TEST   | 2| 2| 2| 2| 6| 2| 8| 2| 2| 8| 7| 2| 2| 2| 9| 8| 2| 3| 3| 3| 4| 3| 3| 0| 3|             
                                           | 7| 7| 7| 8| 8| 8| 4| 8| 8| 9| 7| 9| 9| 9| 3| 4| 9| 0| 0| 2| 6| 0| 0| 2| 1|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   FISCHER 344 RATS MALE                   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
                               ANIMAL ID   | 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1|             
    0 PPM                                  | 1| 1| 1| 1| 1| 2| 2| 2| 2| 2| 3| 3| 3| 3| 3| 4| 4| 4| 4| 4| 5| 5| 5| 5| 5|             
    10-0                                   | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|             
 _____________________________________________________________________________________________________________________|             
 ALIMENTARY SYSTEM                         |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Esophagus                               |             +     +        +  +           +  +           +  +        +   |             
                                            __________________________________________________________________________|             
   Intestine Large                         |             +     +        +  +           +  +           +  +        +   |             
                                            __________________________________________________________________________|             
   Intestine Large, Cecum                  |             +     +        +  +           +  +           +  +        +   |             
      Leukemia Mononuclear                 |                            X                                             |             
                                            __________________________________________________________________________|             
   Intestine Large, Colon                  |             +     +        +  +           +  +           +  +        +   |             
      Mesothelioma Malignant               |                                                                          |             
                                            __________________________________________________________________________|             
   Intestine Large, Rectum                 |             +     +        +  +           +  +           +  +        +   |             
      Mesothelioma Malignant               |                                                                          |             
                                            __________________________________________________________________________|             
   Intestine Small                         |             +     +        +  +           +  +           +  +        +   |             
                                            __________________________________________________________________________|             
   Intestine Small, Duodenum               |             +     +        +  +           +  +           +  +        +   |             
      Leukemia Mononuclear                 |                            X                                             |             
      Mesothelioma Malignant               |                                                                          |             
                                            __________________________________________________________________________|             
   Intestine Small, Ileum                  |             +     M        +  +           +  +           +  +        +   |             
      Leukemia Mononuclear                 |                            X                                             |             
      Mesothelioma Malignant               |                                                                          |             
                                            __________________________________________________________________________|             
   Intestine Small, Jejunum                |             +     +        +  +           +  +           +  +        +   |             
      Leukemia Mononuclear                 |                            X                                             |             
      Mesothelioma Malignant               |                                                                          |             
                                            __________________________________________________________________________|             
   Liver                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenocarcinoma, Metastatic, Prostate |                                                          X               |             
      Hepatocellular Adenoma               | X                    X                                                   |             
      Hepatocellular Adenoma, Multiple     |                                        X                                 |             
      Leukemia Mononuclear                 | X  X           X     X  X  X        X  X     X  X  X  X     X  X  X  X  X|             
      Lymphoma Malignant Histiocytic       |                                                                          |             
      Lymphoma Malignant Lymphocytic       |                                           X                              |             
                                            __________________________________________________________________________|             
   Mesentery                               |             +                       +                    +               |             
      Adenocarcinoma, Metastatic, Prostate |                                                          X               |             
      Leukemia Mononuclear                 |                                                                          |             
      Mesothelioma Malignant               |             X                       X                                    |             
                                            __________________________________________________________________________|             
   Pancreas                                |             +     +        +  +           +  +           +  +        +   |             
      Leukemia Mononuclear                 |                            X                                             |             
                                            __________________________________________________________________________|             
   Salivary Glands                         |             +     +        +  +           +  +           +  +        +   |             
                                            __________________________________________________________________________|             
   Stomach                                 | +  +  +  +  +  +  +  +  +  +  +  +  +     +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Stomach, Forestomach                    | +  +  +  +  +  +  +  +  +  +  +  +  +     +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                            X                                             |             
      Mesothelioma Malignant               |                                                                          |             
      Squamous Cell Papilloma              |                         X                                                |             
                                            __________________________________________________________________________|             
   Stomach, Glandular                      | +  +  +  +  +  +  +  +     +  +  +  +     +  +  +  +  +  +  +  +  +  +  +|             
      Carcinoid Tumor Malignant            |       X                                                                  |             
      Leukemia Mononuclear                 |                            X                                             |             
      Lymphoma Malignant Histiocytic       |                                                                          |             
      Mesothelioma Malignant               |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 CARDIOVASCULAR SYSTEM                     |                                                                          |             
                                           |                                                                          |             
 _____________________________________________________________________________________________________________________|             
                                                             Page  57                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 7| 7| 7| 7| 6| 7| 5| 7| 7| 6| 5| 7| 7| 7| 5| 5| 7| 7| 7| 6| 6| 7| 7| 7| 7|             
                             DAY ON TEST   | 2| 2| 2| 2| 6| 2| 8| 2| 2| 8| 7| 2| 2| 2| 9| 8| 2| 3| 3| 3| 4| 3| 3| 0| 3|             
                                           | 7| 7| 7| 8| 8| 8| 4| 8| 8| 9| 7| 9| 9| 9| 3| 4| 9| 0| 0| 2| 6| 0| 0| 2| 1|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   FISCHER 344 RATS MALE                   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
                               ANIMAL ID   | 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1|             
    0 PPM                                  | 1| 1| 1| 1| 1| 2| 2| 2| 2| 2| 3| 3| 3| 3| 3| 4| 4| 4| 4| 4| 5| 5| 5| 5| 5|             
    10-0                                   | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|             
 _____________________________________________________________________________________________________________________|             
 CARDIOVASCULAR SYSTEM - cont              |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Heart                                   |             +     +        +  +           +  +           +  +        +   |             
      Leukemia Mononuclear                 |                                                                          |             
      Epicardium, Lymphoma Malignant       |                                                                          |             
          Histiocytic                      |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 ENDOCRINE SYSTEM                          |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Adrenal Gland                           |             +     +        +  +           +  +           +  +        +   |             
                                            __________________________________________________________________________|             
   Adrenal Gland, Cortex                   |                   +        +  +           +  +           +  +        +   |             
      Leukemia Mononuclear                 |                                                                          |             
      Lymphoma Malignant Histiocytic       |                                                                          |             
                                            __________________________________________________________________________|             
   Adrenal Gland, Medulla                  |             +     +        +  +           +  +           +  +        +   |             
      Leukemia Mononuclear                 |                                                                          |             
      Pheochromocytoma Complex             |             X                                                            |             
      Pheochromocytoma Benign              |                                                             X            |             
                                            __________________________________________________________________________|             
   Islets, Pancreatic                      |             +     +        +  +           +  +           +  +        +   |             
      Adenoma                              |                                                                          |             
                                            __________________________________________________________________________|             
   Parathyroid Gland                       |             +     +        +  +           +  +           +  +        +   |             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Pituitary Gland                         |       +     +     +        +  +           +  +  +        +  +  +     +   |             
      Pars Distalis, Adenoma               |       X     X     X                             X                        |             
      Pars Distalis, Leukemia Mononuclear  |                                                                          |             
      Pars Nervosa, Astrocytoma Malignant, |                                                                          |             
           Metastatic, Brain               |                                                                          |             
                                            __________________________________________________________________________|             
   Thyroid Gland                           |             +     +        +  +  +        +  +           +  +        +   |             
      Bilateral, C-Cell, Adenoma           |                                                                          |             
      C-Cell, Adenoma                      |                                                                      X   |             
      C-Cell, Carcinoma                    |                                  X                       X               |             
      Follicular Cell, Carcinoma           |                               X                                          |             
 _____________________________________________________________________________________________________________________|             
 GENERAL BODY SYSTEM                       |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Tissue NOS                              |                                                                          |             
      Chordoma                             |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 GENITAL SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Epididymis                              |                   +        +  +           +  +           +  +        +   |             
      Adenocarcinoma, Metastatic, Prostate |                                                          X               |             
      Serosa, Mesothelioma Malignant       |                                                                          |             
                                            __________________________________________________________________________|             
   Preputial Gland                         |       +     +     +        +  +           +  +     +     +  +        +   |             
      Adenoma                              |       X                                                                  |             
      Carcinoma                            |                                                                          |             
                                            __________________________________________________________________________|             
   Prostate                                |             +     +        +  +           +  +           +  +        +   |             
      Adenocarcinoma                       |                                                          X               |             
      Leukemia Mononuclear                 |                            X                                             |             
                                            __________________________________________________________________________|             
   Seminal Vesicle                         |                                                                          |             
 _____________________________________________________________________________________________________________________|             
                                                             Page  58                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 7| 7| 7| 7| 6| 7| 5| 7| 7| 6| 5| 7| 7| 7| 5| 5| 7| 7| 7| 6| 6| 7| 7| 7| 7|             
                             DAY ON TEST   | 2| 2| 2| 2| 6| 2| 8| 2| 2| 8| 7| 2| 2| 2| 9| 8| 2| 3| 3| 3| 4| 3| 3| 0| 3|             
                                           | 7| 7| 7| 8| 8| 8| 4| 8| 8| 9| 7| 9| 9| 9| 3| 4| 9| 0| 0| 2| 6| 0| 0| 2| 1|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   FISCHER 344 RATS MALE                   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
                               ANIMAL ID   | 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1|             
    0 PPM                                  | 1| 1| 1| 1| 1| 2| 2| 2| 2| 2| 3| 3| 3| 3| 3| 4| 4| 4| 4| 4| 5| 5| 5| 5| 5|             
    10-0                                   | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|             
 _____________________________________________________________________________________________________________________|             
 GENITAL SYSTEM - cont                     |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Testes                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +     +  +  +  +  +|             
      Bilateral, Interstitial Cell, Adenoma| X  X  X  X  X  X  X  X  X  X     X  X  X  X        X  X     X  X     X  X|             
      Interstitial Cell, Adenoma           |                               X              X                    X      |             
      Tunic, Mesothelioma Malignant        |                                                    X                     |             
      Tunic, Mesothelioma Malignant,       |                                                                          |             
          Metastatic                       |             X                                                            |             
 _____________________________________________________________________________________________________________________|             
 HEMATOPOIETIC SYSTEM                      |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Bone Marrow                             |             +     +        +  +           +  +           +  +        +   |             
      Femoral, Leukemia Mononuclear        |                                                                          |             
      Femoral, Lymphoma Malignant          |                                                                          |             
          Histiocytic                      |                                                                          |             
                                            __________________________________________________________________________|             
   Lymph Node                              |             +     +        +  +           +  +           +  +        +   |             
      Mandibular, Leukemia Mononuclear     |                                                                      X   |             
      Mandibular, Lymphoma Malignant       |                                                                          |             
          Lymphocytic                      |                                           X                              |             
      Mediastinal, Adenocarcinoma,         |                                                                          |             
          Metastatic, Prostate             |                                                          X               |             
      Mediastinal, Leukemia Mononuclear    |                                                                      X   |             
      Pancreatic, Leukemia Mononuclear     |                                                                          |             
      Renal, Leukemia Mononuclear          |                                                                          |             
                                            __________________________________________________________________________|             
   Lymph Node, Mesenteric                  |                                                          +               |             
      Adenocarcinoma, Metastatic, Prostate |                                                          X               |             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Lymph Node, Thoracic                    |                                                                          |             
                                            __________________________________________________________________________|             
   Spleen                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X              X     X  X  X     X  X  X     X  X  X  X     X  X  X  X  X|             
      Mesothelioma Malignant               |                                                                          |             
                                            __________________________________________________________________________|             
   Thymus                                  |             +     +        +  M           +  +           I  M        +   |             
      Leukemia Mononuclear                 |                            X                                             |             
      Lymphoma Malignant Histiocytic       |                                                                          |             
      Lymphoma Malignant Lymphocytic       |                                           X                              |             
 _____________________________________________________________________________________________________________________|             
 INTEGUMENTARY SYSTEM                      |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Mammary Gland                           |             +              +  +              +           +  +        +   |             
                                            __________________________________________________________________________|             
   Skin                                    |             +  +  +        +  +        +  +  +           +  +     +  +   |             
      Subcutaneous Tissue, Fibroma         |                                                                   X      |             
      Subcutaneous Tissue, Fibrosarcoma    |                X                       X     X                           |             
      Subcutaneous Tissue, Lymphoma        |                                                                          |             
          Malignant Histiocytic            |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 MUSCULOSKELETAL SYSTEM                    |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Bone                                    |             +     +        +  +           +  +           +  +        +   |             
      Rib, Osteosarcoma                    |                   X                                                      |             
 _____________________________________________________________________________________________________________________|             
                                                             Page  59                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 7| 7| 7| 7| 6| 7| 5| 7| 7| 6| 5| 7| 7| 7| 5| 5| 7| 7| 7| 6| 6| 7| 7| 7| 7|             
                             DAY ON TEST   | 2| 2| 2| 2| 6| 2| 8| 2| 2| 8| 7| 2| 2| 2| 9| 8| 2| 3| 3| 3| 4| 3| 3| 0| 3|             
                                           | 7| 7| 7| 8| 8| 8| 4| 8| 8| 9| 7| 9| 9| 9| 3| 4| 9| 0| 0| 2| 6| 0| 0| 2| 1|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   FISCHER 344 RATS MALE                   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
                               ANIMAL ID   | 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1|             
    0 PPM                                  | 1| 1| 1| 1| 1| 2| 2| 2| 2| 2| 3| 3| 3| 3| 3| 4| 4| 4| 4| 4| 5| 5| 5| 5| 5|             
    10-0                                   | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|             
 _____________________________________________________________________________________________________________________|             
 MUSCULOSKELETAL SYSTEM - cont             |                                                                          |             
                                           |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 NERVOUS SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Brain                                   |             +     +        +  +           +  +           +  +        +   |             
      Astrocytoma Malignant                |                                                                          |             
      Leukemia Mononuclear                 |                            X                                             |             
                                            __________________________________________________________________________|             
   Peripheral Nerve                        |                                                                          |             
                                            __________________________________________________________________________|             
   Spinal Cord                             |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 RESPIRATORY SYSTEM                        |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Lung                                    |             +     +        +  +           +  +           +  +        +   |             
      Adenocarcinoma, Metastatic, Prostate |                                                          X               |             
      Leukemia Mononuclear                 |                            X                                X        X   |             
      Lymphoma Malignant Histiocytic       |                                                                          |             
      Lymphoma Malignant Lymphocytic       |                                           X                              |             
      Mediastinum, Lymphoma Malignant      |                                                                          |             
          Histiocytic                      |                                                                          |             
                                            __________________________________________________________________________|             
   Nose                                    |             +     +        +  +           +  +           +  +        +   |             
      Submucosa, Glands, Adenocarcinoma    |                               X                                          |             
                                            __________________________________________________________________________|             
   Trachea                                 |             +     +        +  +           +  +           +  +        +   |             
 _____________________________________________________________________________________________________________________|             
 SPECIAL SENSES SYSTEM                     |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Eye                                     |                                                                      +   |             
 _____________________________________________________________________________________________________________________|             
 URINARY SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Kidney                                  |             +     +  +     +  +           +  +           +  +        +   |             
      Leukemia Mononuclear                 |                            X                                         X   |             
      Renal Tubule, Adenoma                |                                                                          |             
                                            __________________________________________________________________________|             
   Urinary Bladder                         |             +     +        +  +           +  +           +  +        +   |             
      Adenocarcinoma, Metastatic, Prostate |                                                          X               |             
      Mesothelioma Malignant               |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 SYSTEMIC LESIONS                          |                                                                          |             
                                            __________________________________________________________________________|             
   Multiple Organs                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X  X           X     X  X  X     X  X  X     X  X  X  X     X  X  X  X  X|             
      Lymphoma Malignant Histiocytic       |                                                                          |             
      Lymphoma Malignant Lymphocytic       |                                           X                              |             
      Mesothelioma Malignant               |             X                       X              X                     |             
 _____________________________________________________________________________________________________________________|             
                                                             Page  60                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 7| 5| 7| 7| 7| 6| 6| 7| 7| 5| 7| 7| 7| 6| 6| 5| 7| 3| 7| 7| 7| 7| 6| 7| 7|            |
                             DAY ON TEST   | 3| 0| 3| 3| 1| 9| 0| 2| 3| 4| 3| 3| 3| 5| 6| 8| 3| 6| 3| 3| 3| 3| 8| 3| 1|            |
                                           | 1| 3| 1| 1| 6| 1| 1| 7| 4| 2| 4| 4| 5| 1| 5| 0| 5| 7| 5| 5| 6| 6| 9| 6| 4|            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     O      |
   FISCHER 344 RATS MALE                   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     T      |
                               ANIMAL ID   | 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 2| 2| 2| 2| 2|     A      |
    0 PPM                                  | 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 8| 8| 8| 8| 8| 9| 9| 9| 9| 9| 0| 0| 0| 0| 0|     L      |
    10-0                                   | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|            |
 __________________________________________________________________________________________________________________________________ 
 ALIMENTARY SYSTEM                         |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Esophagus                               |    +        +  +  +  +     +           +  +  +     +              +     +|  21        |
                                            __________________________________________________________________________|____________|
   Intestine Large                         |    +        +  +  +  +     +           +  +  +     +              +     +|  21        |
                                            __________________________________________________________________________|____________|
   Intestine Large, Cecum                  |    +        +  +  +  +     +           +  +  +     +              A     +|  20        |
      Leukemia Mononuclear                 |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Intestine Large, Colon                  |    +        +  +  +  +     +           +  +  +     +              +     +|  21        |
      Mesothelioma Malignant               |                            X                                             |          1 |
                                            __________________________________________________________________________|____________|
   Intestine Large, Rectum                 |    +        +  +  +  +     +           +  +  +     +              +     +|  21        |
      Mesothelioma Malignant               |                            X                                             |          1 |
                                            __________________________________________________________________________|____________|
   Intestine Small                         |    +        +  +  +  +     +           +  +  +     +              +     +|  21        |
                                            __________________________________________________________________________|____________|
   Intestine Small, Duodenum               |    +        +  +  +  +     +           +  +  +     +              +     +|  21        |
      Leukemia Mononuclear                 |                                                                          |          1 |
      Mesothelioma Malignant               |                            X                                             |          1 |
                                            __________________________________________________________________________|____________|
   Intestine Small, Ileum                  |    +        +  +  +  +     +           +  +  +     +              A     +|  19        |
      Leukemia Mononuclear                 |                                                                          |          1 |
      Mesothelioma Malignant               |                            X                                             |          1 |
                                            __________________________________________________________________________|____________|
   Intestine Small, Jejunum                |    +        +  +  +  +     +           +  +  +     +              A     +|  20        |
      Leukemia Mononuclear                 |                                                                          |          1 |
      Mesothelioma Malignant               |                            X                                             |          1 |
                                            __________________________________________________________________________|____________|
   Liver                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Adenocarcinoma, Metastatic, Prostate |                                                                          |          1 |
      Hepatocellular Adenoma               |                               X  X                                       |          4 |
      Hepatocellular Adenoma, Multiple     |                                                                          |          1 |
      Leukemia Mononuclear                 |       X     X  X  X  X        X  X  X  X  X  X  X     X                 X|         31 |
      Lymphoma Malignant Histiocytic       |    X                                                                     |          1 |
      Lymphoma Malignant Lymphocytic       |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Mesentery                               |                            +  +           +                              |   6        |
      Adenocarcinoma, Metastatic, Prostate |                                                                          |          1 |
      Leukemia Mononuclear                 |                                           X                              |          1 |
      Mesothelioma Malignant               |                            X                                             |          3 |
                                            __________________________________________________________________________|____________|
   Pancreas                                |    +        +  +  +  +     +           +  +  +     +              +     +|  21        |
      Leukemia Mononuclear                 |                                           X                              |          2 |
                                            __________________________________________________________________________|____________|
   Salivary Glands                         |    +        +  +  +  +     +           +  +  +     +              +     +|  21        |
                                            __________________________________________________________________________|____________|
   Stomach                                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
                                            __________________________________________________________________________|____________|
   Stomach, Forestomach                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
      Leukemia Mononuclear                 |                                                                          |          1 |
      Mesothelioma Malignant               |                            X                                             |          1 |
      Squamous Cell Papilloma              |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Stomach, Glandular                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  48        |
      Carcinoid Tumor Malignant            |                                                                          |          1 |
 __________________________________________________________________________________________________________________________________ 
                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  
                                                             Page  61                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 7| 5| 7| 7| 7| 6| 6| 7| 7| 5| 7| 7| 7| 6| 6| 5| 7| 3| 7| 7| 7| 7| 6| 7| 7|            |
                             DAY ON TEST   | 3| 0| 3| 3| 1| 9| 0| 2| 3| 4| 3| 3| 3| 5| 6| 8| 3| 6| 3| 3| 3| 3| 8| 3| 1|            |
                                           | 1| 3| 1| 1| 6| 1| 1| 7| 4| 2| 4| 4| 5| 1| 5| 0| 5| 7| 5| 5| 6| 6| 9| 6| 4|            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     O      |
   FISCHER 344 RATS MALE                   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     T      |
                               ANIMAL ID   | 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 2| 2| 2| 2| 2|     A      |
    0 PPM                                  | 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 8| 8| 8| 8| 8| 9| 9| 9| 9| 9| 0| 0| 0| 0| 0|     L      |
    10-0                                   | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|            |
 __________________________________________________________________________________________________________________________________ 
 ALIMENTARY SYSTEM - cont                  |                                                                          |            |
                                           |                                                                          |            |
      Leukemia Mononuclear                 |                                                                          |          1 |
      Lymphoma Malignant Histiocytic       |    X                                                                     |          1 |
      Mesothelioma Malignant               |                            X                                             |          1 |
 _____________________________________________________________________________________________________________________|            |
 CARDIOVASCULAR SYSTEM                     |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Heart                                   |    +        +  +  +  +     +           +  +  +     +              +     +|  21        |
      Leukemia Mononuclear                 |                X                          X                              |          2 |
      Epicardium, Lymphoma Malignant       |                                                                          |            |
          Histiocytic                      |    X                                                                     |          1 |
 _____________________________________________________________________________________________________________________|            |
 ENDOCRINE SYSTEM                          |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Adrenal Gland                           |    +        +  +  +  +     +     +     +  +  +     +              +     +|  22        |
                                            __________________________________________________________________________|____________|
   Adrenal Gland, Cortex                   |    +        +  +  +  +     +     +     +  +  +     +              +     +|  21        |
      Leukemia Mononuclear                 |                X  X  X           X     X                                 |          5 |
      Lymphoma Malignant Histiocytic       |    X                                                                     |          1 |
                                            __________________________________________________________________________|____________|
   Adrenal Gland, Medulla                  |    +        +  +  +  +     +     +     +  +  +     +              +     +|  22        |
      Leukemia Mononuclear                 |                X  X  X           X     X                                 |          5 |
      Pheochromocytoma Complex             |                                                                          |          1 |
      Pheochromocytoma Benign              |             X                    X           X                           |          4 |
                                            __________________________________________________________________________|____________|
   Islets, Pancreatic                      |    +        +  +  +  +     +           +  +  +     +              +     +|  21        |
      Adenoma                              |                                                                   X      |          1 |
                                            __________________________________________________________________________|____________|
   Parathyroid Gland                       |    +        +  +  +  +     +           +  +  +     +              +     +|  21        |
      Leukemia Mononuclear                 |                                           X                              |          1 |
                                            __________________________________________________________________________|____________|
   Pituitary Gland                         | +  M        +  +  +  +     +           +  +  +     +  +  +        +  +  +|  27        |
      Pars Distalis, Adenoma               | X                                                     X              X   |          7 |
      Pars Distalis, Leukemia Mononuclear  |                X     X                    X                              |          3 |
      Pars Nervosa, Astrocytoma Malignant, |                                                                          |            |
           Metastatic, Brain               |                                              X                           |          1 |
                                            __________________________________________________________________________|____________|
   Thyroid Gland                           |    +        +  +  +  +     +           +  +  +     +  +           A  +  +|  23        |
      Bilateral, C-Cell, Adenoma           |                                        X                                 |          1 |
      C-Cell, Adenoma                      |                      X                                               X   |          3 |
      C-Cell, Carcinoma                    |                                                                          |          2 |
      Follicular Cell, Carcinoma           |                                                       X                  |          2 |
 _____________________________________________________________________________________________________________________|            |
 GENERAL BODY SYSTEM                       |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Tissue NOS                              |                                                                         +|   1        |
      Chordoma                             |                                                                         X|          1 |
 _____________________________________________________________________________________________________________________|            |
 GENITAL SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
 __________________________________________________________________________________________________________________________________ 
                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  
                                                             Page  62                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 7| 5| 7| 7| 7| 6| 6| 7| 7| 5| 7| 7| 7| 6| 6| 5| 7| 3| 7| 7| 7| 7| 6| 7| 7|            |
                             DAY ON TEST   | 3| 0| 3| 3| 1| 9| 0| 2| 3| 4| 3| 3| 3| 5| 6| 8| 3| 6| 3| 3| 3| 3| 8| 3| 1|            |
                                           | 1| 3| 1| 1| 6| 1| 1| 7| 4| 2| 4| 4| 5| 1| 5| 0| 5| 7| 5| 5| 6| 6| 9| 6| 4|            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     O      |
   FISCHER 344 RATS MALE                   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     T      |
                               ANIMAL ID   | 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 2| 2| 2| 2| 2|     A      |
    0 PPM                                  | 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 8| 8| 8| 8| 8| 9| 9| 9| 9| 9| 0| 0| 0| 0| 0|     L      |
    10-0                                   | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|            |
 __________________________________________________________________________________________________________________________________ 
 GENITAL SYSTEM - cont                     |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Epididymis                              |    +        +  +  +  +     +           +  +  +     +              +     +|  20        |
      Adenocarcinoma, Metastatic, Prostate |                                                                          |          1 |
      Serosa, Mesothelioma Malignant       |                            X                                             |          1 |
                                            __________________________________________________________________________|____________|
   Preputial Gland                         |    +        +  +  +  +     +  +  +     +  +  +     +              +     +|  25        |
      Adenoma                              |                                                                          |          1 |
      Carcinoma                            |             X        X           X                                       |          3 |
                                            __________________________________________________________________________|____________|
   Prostate                                |    +        +  +  +  +     +           +  +  +     +              +     +|  21        |
      Adenocarcinoma                       |                                                                          |          1 |
      Leukemia Mononuclear                 |                                           X                              |          2 |
                                            __________________________________________________________________________|____________|
   Seminal Vesicle                         |                +                                                  +      |   2        |
                                            __________________________________________________________________________|____________|
   Testes                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
      Bilateral, Interstitial Cell, Adenoma| X     X  X  X     X  X  X  X  X  X  X  X  X  X  X     X  X  X  X     X  X|         41 |
      Interstitial Cell, Adenoma           |    X                                                              X      |          5 |
      Tunic, Mesothelioma Malignant        |    X                       X                                             |          3 |
      Tunic, Mesothelioma Malignant,       |                                                                          |            |
          Metastatic                       |                                                                          |          1 |
 _____________________________________________________________________________________________________________________|            |
 HEMATOPOIETIC SYSTEM                      |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Bone Marrow                             |    +        +  +  +  +     +           +  +  +     +              +     +|  21        |
      Femoral, Leukemia Mononuclear        |                X  X                       X                              |          3 |
      Femoral, Lymphoma Malignant          |                                                                          |            |
          Histiocytic                      |    X                                                                     |          1 |
                                            __________________________________________________________________________|____________|
   Lymph Node                              |    +        +  +  +  +     +     +     +  +  +     +     +        +     +|  23        |
      Mandibular, Leukemia Mononuclear     |                X  X  X           X        X                              |          6 |
      Mandibular, Lymphoma Malignant       |                                                                          |            |
          Lymphocytic                      |                                                                          |          1 |
      Mediastinal, Adenocarcinoma,         |                                                                          |            |
          Metastatic, Prostate             |                                                                          |          1 |
      Mediastinal, Leukemia Mononuclear    |                X                          X                              |          3 |
      Pancreatic, Leukemia Mononuclear     |                X                                                         |          1 |
      Renal, Leukemia Mononuclear          |                                           X                              |          1 |
                                            __________________________________________________________________________|____________|
   Lymph Node, Mesenteric                  |                                  +                       +               |   3        |
      Adenocarcinoma, Metastatic, Prostate |                                                                          |          1 |
      Leukemia Mononuclear                 |                                  X                                       |          1 |
                                            __________________________________________________________________________|____________|
   Lymph Node, Thoracic                    |                                                          +               |   1        |
                                            __________________________________________________________________________|____________|
   Spleen                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 |       X     X  X  X  X        X  X  X  X  X  X  X     X                 X|         31 |
      Mesothelioma Malignant               |                            X                                             |          1 |
                                            __________________________________________________________________________|____________|
   Thymus                                  |    +        +  +  +  M     +           +  +  +     +              +     +|  17        |
 __________________________________________________________________________________________________________________________________ 
                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  
                                                             Page  63                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 7| 5| 7| 7| 7| 6| 6| 7| 7| 5| 7| 7| 7| 6| 6| 5| 7| 3| 7| 7| 7| 7| 6| 7| 7|            |
                             DAY ON TEST   | 3| 0| 3| 3| 1| 9| 0| 2| 3| 4| 3| 3| 3| 5| 6| 8| 3| 6| 3| 3| 3| 3| 8| 3| 1|            |
                                           | 1| 3| 1| 1| 6| 1| 1| 7| 4| 2| 4| 4| 5| 1| 5| 0| 5| 7| 5| 5| 6| 6| 9| 6| 4|            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     O      |
   FISCHER 344 RATS MALE                   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     T      |
                               ANIMAL ID   | 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 2| 2| 2| 2| 2|     A      |
    0 PPM                                  | 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 8| 8| 8| 8| 8| 9| 9| 9| 9| 9| 0| 0| 0| 0| 0|     L      |
    10-0                                   | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|            |
 __________________________________________________________________________________________________________________________________ 
 HEMATOPOIETIC SYSTEM - cont               |                                                                          |            |
                                           |                                                                          |            |
      Leukemia Mononuclear                 |                X                          X                              |          3 |
      Lymphoma Malignant Histiocytic       |    X                                                                     |          1 |
      Lymphoma Malignant Lymphocytic       |                                                                          |          1 |
 _____________________________________________________________________________________________________________________|            |
 INTEGUMENTARY SYSTEM                      |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Mammary Gland                           |    +        +     +  +     +           +  +                              |  14        |
                                            __________________________________________________________________________|____________|
   Skin                                    |    +     +  +  +  +  +     +           +  +  +     +     +        +     +|  26        |
      Subcutaneous Tissue, Fibroma         |          X                                                               |          2 |
      Subcutaneous Tissue, Fibrosarcoma    |                                                          X               |          4 |
      Subcutaneous Tissue, Lymphoma        |                                                                          |            |
          Malignant Histiocytic            |    X                                                                     |          1 |
 _____________________________________________________________________________________________________________________|            |
 MUSCULOSKELETAL SYSTEM                    |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Bone                                    |    +        +  +  +  +     +           +  +  +     +              +     +|  21        |
      Rib, Osteosarcoma                    |                                                                          |          1 |
 _____________________________________________________________________________________________________________________|            |
 NERVOUS SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Brain                                   |    +        +  +  +  +     +           +  +  +     +              +     +|  21        |
      Astrocytoma Malignant                |                                              X                           |          1 |
      Leukemia Mononuclear                 |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Peripheral Nerve                        |                +                                                         |   1        |
                                            __________________________________________________________________________|____________|
   Spinal Cord                             |                +                                                         |   1        |
 _____________________________________________________________________________________________________________________|            |
 RESPIRATORY SYSTEM                        |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Lung                                    |    +        +  +  +  +     +           +  +  +     +              +     +|  21        |
      Adenocarcinoma, Metastatic, Prostate |                                                                          |          1 |
      Leukemia Mononuclear                 |                X  X  X                 X  X                              |          8 |
      Lymphoma Malignant Histiocytic       |    X                                                                     |          1 |
      Lymphoma Malignant Lymphocytic       |                                                                          |          1 |
      Mediastinum, Lymphoma Malignant      |                                                                          |            |
          Histiocytic                      |    X                                                                     |          1 |
                                            __________________________________________________________________________|____________|
   Nose                                    |    +        +  +  +  +     +           +  +  +     +              +     +|  21        |
      Submucosa, Glands, Adenocarcinoma    |                                                    X                     |          2 |
                                            __________________________________________________________________________|____________|
   Trachea                                 |    +        +  +  +  +     +           +  +  +     +              +     +|  21        |
 _____________________________________________________________________________________________________________________|            |
 SPECIAL SENSES SYSTEM                     |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Eye                                     |                                                                          |   1        |
 _____________________________________________________________________________________________________________________|            |
 URINARY SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
 __________________________________________________________________________________________________________________________________ 
                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  
                                                             Page  64                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 7| 5| 7| 7| 7| 6| 6| 7| 7| 5| 7| 7| 7| 6| 6| 5| 7| 3| 7| 7| 7| 7| 6| 7| 7|            |
                             DAY ON TEST   | 3| 0| 3| 3| 1| 9| 0| 2| 3| 4| 3| 3| 3| 5| 6| 8| 3| 6| 3| 3| 3| 3| 8| 3| 1|            |
                                           | 1| 3| 1| 1| 6| 1| 1| 7| 4| 2| 4| 4| 5| 1| 5| 0| 5| 7| 5| 5| 6| 6| 9| 6| 4|            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     O      |
   FISCHER 344 RATS MALE                   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     T      |
                               ANIMAL ID   | 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 2| 2| 2| 2| 2|     A      |
    0 PPM                                  | 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 8| 8| 8| 8| 8| 9| 9| 9| 9| 9| 0| 0| 0| 0| 0|     L      |
    10-0                                   | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|            |
 __________________________________________________________________________________________________________________________________ 
 URINARY SYSTEM - cont                     |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Kidney                                  |    +        +  +  +  +     +           +  +  +     +        +     +  +  +|  24        |
      Leukemia Mononuclear                 |                X                          X                              |          4 |
      Renal Tubule, Adenoma                |                                                                      X   |          1 |
                                            __________________________________________________________________________|____________|
   Urinary Bladder                         |    +        +  +  +  +     +           +  +  +     M              +     +|  20        |
      Adenocarcinoma, Metastatic, Prostate |                                                                          |          1 |
      Mesothelioma Malignant               |                            X                                             |          1 |
 __________________________________________________________________________________________________________________________________ 
 SYSTEMIC LESIONS                          |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Multiple Organs                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 |       X     X  X  X  X        X  X  X  X  X  X  X     X                 X|         32 |
      Lymphoma Malignant Histiocytic       |    X                                                                     |          1 |
      Lymphoma Malignant Lymphocytic       |                                                                          |          1 |
      Mesothelioma Malignant               |    X                       X                                             |          5 |
 __________________________________________________________________________________________________________________________________ 
                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  
                                                             Page  65                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 4| 7| 7| 7| 7| 7| 6| 5| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 6| 7| 7|             
                             DAY ON TEST   | 3| 2| 2| 2| 2| 2| 8| 8| 2| 2| 2| 2| 2| 2| 2| 2| 2| 3| 1| 3| 3| 3| 7| 3| 3|             
                                           | 6| 7| 7| 7| 7| 8| 3| 1| 1| 8| 8| 8| 9| 9| 9| 9| 9| 0| 7| 0| 0| 0| 6| 1| 1|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   FISCHER 344 RATS MALE                   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
                               ANIMAL ID   | 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2|             
    3 PPM                                  | 1| 1| 1| 1| 1| 2| 2| 2| 2| 2| 3| 3| 3| 3| 3| 4| 4| 4| 4| 4| 5| 5| 5| 5| 5|             
    1-1                                    | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|             
 _____________________________________________________________________________________________________________________|             
 ALIMENTARY SYSTEM                         |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Esophagus                               | +                 +  +  +                             +           +      |             
                                            __________________________________________________________________________|             
   Intestine Large                         | +                 +  +  +                             +           +      |             
                                            __________________________________________________________________________|             
   Intestine Large, Cecum                  | +                 +  +  +                             +           +      |             
                                            __________________________________________________________________________|             
   Intestine Large, Colon                  | +                 +  +  +                             +           +      |             
                                            __________________________________________________________________________|             
   Intestine Large, Rectum                 | +                 +  +  +                             +           +      |             
                                            __________________________________________________________________________|             
   Intestine Small                         | +                 +  +  +                             +           +      |             
                                            __________________________________________________________________________|             
   Intestine Small, Duodenum               | +                 +  +  +                             +           +      |             
                                            __________________________________________________________________________|             
   Intestine Small, Ileum                  | +                 +  +  +                             +           +      |             
                                            __________________________________________________________________________|             
   Intestine Small, Jejunum                | +                 +  +  +                             +           +      |             
                                            __________________________________________________________________________|             
   Liver                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Hepatocellular Carcinoma             |                                  X                                       |             
      Hepatocellular Adenoma               |                                                       X                  |             
      Hepatocellular Adenoma, Multiple     |                               X                                          |             
      Leukemia Mononuclear                 |          X     X  X     X  X  X  X  X              X  X  X     X  X  X  X|             
                                            __________________________________________________________________________|             
   Pancreas                                | +                 +  +  +                             +           +      |             
      Leukemia Mononuclear                 |                                                       X                  |             
      Acinus, Adenoma                      |                         X                                                |             
                                            __________________________________________________________________________|             
   Salivary Glands                         | +                 +  +  +                             +           +      |             
                                            __________________________________________________________________________|             
   Stomach                                 | +  +  +  +     +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +     +  +  +|             
                                            __________________________________________________________________________|             
   Stomach, Forestomach                    | +  +  +  +     +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +     +  +  +|             
                                            __________________________________________________________________________|             
   Stomach, Glandular                      | +  +  +  +     +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +     +  +  +|             
 _____________________________________________________________________________________________________________________|             
 CARDIOVASCULAR SYSTEM                     |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Heart                                   | +                 +  +  +                             +           +      |             
      Leukemia Mononuclear                 |                                                       X                  |             
 _____________________________________________________________________________________________________________________|             
 ENDOCRINE SYSTEM                          |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Adrenal Gland                           | +                 +  +  +                             +           +      |             
                                            __________________________________________________________________________|             
   Adrenal Gland, Cortex                   | +                 +  +  +                             +           +      |             
      Leukemia Mononuclear                 |                                                       X                  |             
                                            __________________________________________________________________________|             
   Adrenal Gland, Medulla                  | +                 +  +  +                             +           +      |             
      Leukemia Mononuclear                 |                                                       X                  |             
      Pheochromocytoma Complex             |                                                                          |             
      Pheochromocytoma Benign              |                                                                          |             
                                            __________________________________________________________________________|             
   Islets, Pancreatic                      | +                 +  +  +                             +           +      |             
                                            __________________________________________________________________________|             
   Parathyroid Gland                       | +                 +  +  +                             +           +      |             
                                            __________________________________________________________________________|             
   Pituitary Gland                         | +     +           +  +  +  +                          +     +     +      |             
      Pars Distalis, Adenoma               |       X              X  X  X                                X            |             
                                            __________________________________________________________________________|             
   Thyroid Gland                           | +                 +  +  +                             +           +      |             
      C-Cell, Adenoma                      |                                                                          |             
      C-Cell, Carcinoma                    |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 GENERAL BODY SYSTEM                       |                                                                          |             
                                           |                                                                          |             
    None                                   |                                                                          |             
 _____________________________________________________________________________________________________________________|             
                                                             Page  66                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 4| 7| 7| 7| 7| 7| 6| 5| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 6| 7| 7|             
                             DAY ON TEST   | 3| 2| 2| 2| 2| 2| 8| 8| 2| 2| 2| 2| 2| 2| 2| 2| 2| 3| 1| 3| 3| 3| 7| 3| 3|             
                                           | 6| 7| 7| 7| 7| 8| 3| 1| 1| 8| 8| 8| 9| 9| 9| 9| 9| 0| 7| 0| 0| 0| 6| 1| 1|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   FISCHER 344 RATS MALE                   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
                               ANIMAL ID   | 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2|             
    3 PPM                                  | 1| 1| 1| 1| 1| 2| 2| 2| 2| 2| 3| 3| 3| 3| 3| 4| 4| 4| 4| 4| 5| 5| 5| 5| 5|             
    1-1                                    | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|             
 _____________________________________________________________________________________________________________________|             
 GENITAL SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Epididymis                              | +                 +  +  +                             +           +      |             
                                            __________________________________________________________________________|             
   Preputial Gland                         | +                 +  +  +     +                 +     +        +  +      |             
      Adenoma                              |                               X                                          |             
      Carcinoma                            |                                                 X                 X      |             
                                            __________________________________________________________________________|             
   Prostate                                | +                 +  +  +                             +           +      |             
                                            __________________________________________________________________________|             
   Seminal Vesicle                         |                         +           +                                    |             
                                            __________________________________________________________________________|             
   Testes                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Bilateral, Interstitial Cell, Adenoma|    X  X  X  X  X  X     X  X     X  X  X  X  X  X  X  X  X  X  X  X  X   |             
      Interstitial Cell, Adenoma           |                               X                                         X|             
 _____________________________________________________________________________________________________________________|             
 HEMATOPOIETIC SYSTEM                      |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Bone Marrow                             | +                 +  +  +                             +           +      |             
      Femoral, Leukemia Mononuclear        |                   X                                               X      |             
                                            __________________________________________________________________________|             
   Lymph Node                              | +                 +  +  +     +                       +           +      |             
      Mandibular, Leukemia Mononuclear     |                   X     X     X                       X           X      |             
      Mediastinal, Leukemia Mononuclear    |                               X                       X                  |             
      Pancreatic, Leukemia Mononuclear     |                                                                          |             
      Renal, Leukemia Mononuclear          |                                                                          |             
                                            __________________________________________________________________________|             
   Lymph Node, Mesenteric                  |                               +                                          |             
      Leukemia Mononuclear                 |                               X                                          |             
                                            __________________________________________________________________________|             
   Spleen                                  | +  +  +  +     +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Fibrosarcoma                         |                                                                          |             
      Leukemia Mononuclear                 |          X     X  X     X  X  X  X  X              X  X  X     X  X  X  X|             
      Osteosarcoma, Metastatic, Bone       |                                                                          |             
                                            __________________________________________________________________________|             
   Thymus                                  | M                 +  +  +                             +           +      |             
      Leukemia Mononuclear                 |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 INTEGUMENTARY SYSTEM                      |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Mammary Gland                           | +                 +  +  +              +           +  +           +      |             
      Fibroadenoma                         |                                        X           X                     |             
                                            __________________________________________________________________________|             
   Skin                                    | +     +           +  +  +     +        +              +     +  +  +      |             
      Keratoacanthoma                      |                                                             X            |             
      Sebaceous Gland, Adenoma             |                                                                X         |             
      Subcutaneous Tissue, Fibroma         |                         X     X                                X         |             
      Subcutaneous Tissue, Fibrosarcoma    | X     X                                                                  |             
 _____________________________________________________________________________________________________________________|             
 MUSCULOSKELETAL SYSTEM                    |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Bone                                    | +                 +  +  +                             +           +      |             
      Femur, Osteosarcoma                  |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 NERVOUS SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Brain                                   | +                 +  +  +                             +           +      |             
                                            __________________________________________________________________________|             
   Spinal Cord                             |                                                       +                  |             
 _____________________________________________________________________________________________________________________|             
 RESPIRATORY SYSTEM                        |                                                                          |             
 _____________________________________________________________________________________________________________________|             
                                                             Page  67                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 4| 7| 7| 7| 7| 7| 6| 5| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 6| 7| 7|             
                             DAY ON TEST   | 3| 2| 2| 2| 2| 2| 8| 8| 2| 2| 2| 2| 2| 2| 2| 2| 2| 3| 1| 3| 3| 3| 7| 3| 3|             
                                           | 6| 7| 7| 7| 7| 8| 3| 1| 1| 8| 8| 8| 9| 9| 9| 9| 9| 0| 7| 0| 0| 0| 6| 1| 1|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   FISCHER 344 RATS MALE                   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
                               ANIMAL ID   | 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2|             
    3 PPM                                  | 1| 1| 1| 1| 1| 2| 2| 2| 2| 2| 3| 3| 3| 3| 3| 4| 4| 4| 4| 4| 5| 5| 5| 5| 5|             
    1-1                                    | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|             
 _____________________________________________________________________________________________________________________|             
 RESPIRATORY SYSTEM - cont                 |                                                                          |             
                                           |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Lung                                    | +                 +  +  +  +                          +           +      |             
      Alveolar/Bronchiolar Adenoma         |                            X                                      X      |             
      Alveolar/Bronchiolar Carcinoma       | X                                                                        |             
      Chordoma, Metastatic, Uncertain      |                                                                          |             
          Primary Site                     |                                                       X                  |             
      Fibrosarcoma, Metastatic, Skin       |                                                                          |             
      Leukemia Mononuclear                 |                   X     X                             X                  |             
      Osteosarcoma, Metastatic, Bone       |                                                                          |             
      Pheochromocytoma Complex, Metastatic,|                                                                          |             
           Adrenal Gland                   |                                                                          |             
      Mediastinum, Alveolar/Bronchiolar    |                                                                          |             
          Carcinoma, Metastatic, Lung      | X                                                                        |             
                                            __________________________________________________________________________|             
   Nose                                    | +                 +  +  +                             +           +      |             
                                            __________________________________________________________________________|             
   Trachea                                 | +                 +  +  +                             +           +      |             
 _____________________________________________________________________________________________________________________|             
 SPECIAL SENSES SYSTEM                     |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Eye                                     |                            +                                             |             
 _____________________________________________________________________________________________________________________|             
 URINARY SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Kidney                                  | +              +  +  +  +     +                       +     +     +      |             
                                            __________________________________________________________________________|             
   Urinary Bladder                         | +                 +  +  +                             +           +      |             
 _____________________________________________________________________________________________________________________|             
 SYSTEMIC LESIONS                          |                                                                          |             
                                            __________________________________________________________________________|             
   Multiple Organs                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |          X     X  X     X  X  X  X  X              X  X  X     X  X  X  X|             
 _____________________________________________________________________________________________________________________|             
                                                             Page  68                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 7| 5| 7| 7| 7| 7| 6| 7| 5| 6| 7| 7| 7| 6| 7| 6| 6| 7| 7| 7| 4| 7| 7| 7| 7|            |
                             DAY ON TEST   | 3| 2| 0| 3| 3| 3| 7| 3| 8| 5| 3| 3| 3| 7| 2| 4| 1| 3| 3| 3| 8| 3| 3| 3| 3|            |
                                           | 1| 0| 2| 1| 1| 4| 9| 4| 2| 4| 4| 4| 5| 6| 1| 5| 6| 5| 5| 5| 7| 6| 6| 6| 6|            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     O      |
   FISCHER 344 RATS MALE                   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     T      |
                               ANIMAL ID   | 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 3| 3| 3| 3| 3|     A      |
    3 PPM                                  | 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 8| 8| 8| 8| 8| 9| 9| 9| 9| 9| 0| 0| 0| 0| 0|     L      |
    1-1                                    | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|            |
 __________________________________________________________________________________________________________________________________ 
 ALIMENTARY SYSTEM                         |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Esophagus                               |    +  +           +     +  +           +  +  +  +           +            |  16        |
                                            __________________________________________________________________________|____________|
   Intestine Large                         |    +  +           +     +  +           +  +  +  +           +            |  16        |
                                            __________________________________________________________________________|____________|
   Intestine Large, Cecum                  |    +  +           +     +  +           +  +  +  +           +            |  16        |
                                            __________________________________________________________________________|____________|
   Intestine Large, Colon                  |    +  +           +     +  +           +  +  +  +           +            |  16        |
                                            __________________________________________________________________________|____________|
   Intestine Large, Rectum                 |    +  +           +     +  +           +  +  +  +           +            |  16        |
                                            __________________________________________________________________________|____________|
   Intestine Small                         |    +  +           +     +  +           +  +  +  +           +            |  16        |
                                            __________________________________________________________________________|____________|
   Intestine Small, Duodenum               |    +  +           +     +  +           +  +  +  +           +            |  16        |
                                            __________________________________________________________________________|____________|
   Intestine Small, Ileum                  |    +  +           +     +  +           +  +  +  +           +            |  16        |
                                            __________________________________________________________________________|____________|
   Intestine Small, Jejunum                |    +  +           +     +  +           +  +  +  +           +            |  16        |
                                            __________________________________________________________________________|____________|
   Liver                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Hepatocellular Carcinoma             |                                                                          |          1 |
      Hepatocellular Adenoma               | X                                                                 X      |          3 |
      Hepatocellular Adenoma, Multiple     |       X                                                                  |          2 |
      Leukemia Mononuclear                 | X  X  X  X     X  X  X  X  X  X  X        X  X     X              X      |         30 |
                                            __________________________________________________________________________|____________|
   Pancreas                                |    +  +           +     +  +           +  +  +  +           +            |  16        |
      Leukemia Mononuclear                 |                                                                          |          1 |
      Acinus, Adenoma                      |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Salivary Glands                         |    +  +           +     +  +           +  +  +  +           +            |  16        |
                                            __________________________________________________________________________|____________|
   Stomach                                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  48        |
                                            __________________________________________________________________________|____________|
   Stomach, Forestomach                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  48        |
                                            __________________________________________________________________________|____________|
   Stomach, Glandular                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  48        |
 _____________________________________________________________________________________________________________________|            |
 CARDIOVASCULAR SYSTEM                     |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Heart                                   |    +  +           +     +  +           +  +  +  +           +            |  16        |
      Leukemia Mononuclear                 |                                                                          |          1 |
 _____________________________________________________________________________________________________________________|            |
 ENDOCRINE SYSTEM                          |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Adrenal Gland                           |    +  +           +     +  +           +  +  +  +           +            |  16        |
                                            __________________________________________________________________________|____________|
   Adrenal Gland, Cortex                   |    +  +           +     +  +           +  +  +  +                        |  15        |
      Leukemia Mononuclear                 |       X                                   X                              |          3 |
                                            __________________________________________________________________________|____________|
   Adrenal Gland, Medulla                  |    +  +           +     +  +           +  +  +  +           +            |  16        |
      Leukemia Mononuclear                 |       X                                   X                              |          3 |
      Pheochromocytoma Complex             |                                                             X            |          1 |
      Pheochromocytoma Benign              |                   X                                                      |          1 |
                                            __________________________________________________________________________|____________|
   Islets, Pancreatic                      |    +  +           +     +  +           +  +  +  +           +            |  16        |
                                            __________________________________________________________________________|____________|
   Parathyroid Gland                       |    +  +           +     +  +           +  +  +  +           +            |  16        |
                                            __________________________________________________________________________|____________|
   Pituitary Gland                         | +  +  +        +  +     +  +     +     +  +  +  +           +            |  22        |
      Pars Distalis, Adenoma               | X              X           X     X                                       |          9 |
                                            __________________________________________________________________________|____________|
   Thyroid Gland                           |    +  +           +     +  +           +  +  +  +           +           +|  17        |
 __________________________________________________________________________________________________________________________________ 
                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  
                                                             Page  69                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 7| 5| 7| 7| 7| 7| 6| 7| 5| 6| 7| 7| 7| 6| 7| 6| 6| 7| 7| 7| 4| 7| 7| 7| 7|            |
                             DAY ON TEST   | 3| 2| 0| 3| 3| 3| 7| 3| 8| 5| 3| 3| 3| 7| 2| 4| 1| 3| 3| 3| 8| 3| 3| 3| 3|            |
                                           | 1| 0| 2| 1| 1| 4| 9| 4| 2| 4| 4| 4| 5| 6| 1| 5| 6| 5| 5| 5| 7| 6| 6| 6| 6|            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     O      |
   FISCHER 344 RATS MALE                   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     T      |
                               ANIMAL ID   | 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 3| 3| 3| 3| 3|     A      |
    3 PPM                                  | 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 8| 8| 8| 8| 8| 9| 9| 9| 9| 9| 0| 0| 0| 0| 0|     L      |
    1-1                                    | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|            |
 __________________________________________________________________________________________________________________________________ 
 ENDOCRINE SYSTEM - cont                   |                                                                          |            |
                                           |                                                                          |            |
      C-Cell, Adenoma                      |    X                    X  X              X                              |          4 |
      C-Cell, Carcinoma                    |                                                                         X|          1 |
 _____________________________________________________________________________________________________________________|            |
 GENERAL BODY SYSTEM                       |                                                                          |            |
                                           |                                                                          |            |
    None                                   |                                                                          |            |
 _____________________________________________________________________________________________________________________|            |
 GENITAL SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Epididymis                              |    +  +           +     +  +           +  +  +  +           +            |  16        |
                                            __________________________________________________________________________|____________|
   Preputial Gland                         |    +  +           +     +  +           +  +  +  +     +     +            |  20        |
      Adenoma                              |                                                                          |          1 |
      Carcinoma                            |                                        X                                 |          3 |
                                            __________________________________________________________________________|____________|
   Prostate                                |    +  +           +     +  +           +  +  +  +           +            |  16        |
                                            __________________________________________________________________________|____________|
   Seminal Vesicle                         |                                                                +         |   3        |
                                            __________________________________________________________________________|____________|
   Testes                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Bilateral, Interstitial Cell, Adenoma| X  X  X  X  X  X  X  X  X  X  X  X  X  X  X  X     X     X     X  X  X  X|         43 |
      Interstitial Cell, Adenoma           |                                                 X     X                  |          4 |
 _____________________________________________________________________________________________________________________|            |
 HEMATOPOIETIC SYSTEM                      |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Bone Marrow                             |    +  +           +     +  +           +  +  +  M           +            |  15        |
      Femoral, Leukemia Mononuclear        |                                              X                           |          3 |
                                            __________________________________________________________________________|____________|
   Lymph Node                              | +  +  +           +     +  +           +  +  +  +           +            |  18        |
      Mandibular, Leukemia Mononuclear     |    X  X           X                       X  X                           |         10 |
      Mediastinal, Leukemia Mononuclear    |    X              X                                                      |          4 |
      Pancreatic, Leukemia Mononuclear     |                   X                                                      |          1 |
      Renal, Leukemia Mononuclear          | X                                                                        |          1 |
                                            __________________________________________________________________________|____________|
   Lymph Node, Mesenteric                  |                   +                                                      |   2        |
      Leukemia Mononuclear                 |                   X                                                      |          2 |
                                            __________________________________________________________________________|____________|
   Spleen                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
      Fibrosarcoma                         |                                                                      X   |          1 |
      Leukemia Mononuclear                 | X  X  X  X     X  X  X  X  X  X  X        X  X     X     X        X  X   |         32 |
      Osteosarcoma, Metastatic, Bone       |                                                 X                        |          1 |
                                            __________________________________________________________________________|____________|
   Thymus                                  |    +  +           +     +  +           +  +  +  +           +            |  15        |
      Leukemia Mononuclear                 |       X                                                                  |          1 |
 _____________________________________________________________________________________________________________________|            |
 INTEGUMENTARY SYSTEM                      |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Mammary Gland                           |    +  +           +        +              +                 +            |  14        |
      Fibroadenoma                         |                                                                          |          2 |
                                            __________________________________________________________________________|____________|
   Skin                                    |    +  +           +  +  +  +           +  +  +  +           +            |  22        |
      Keratoacanthoma                      |                                                                          |          1 |
 __________________________________________________________________________________________________________________________________ 
                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  
                                                             Page  70                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 7| 5| 7| 7| 7| 7| 6| 7| 5| 6| 7| 7| 7| 6| 7| 6| 6| 7| 7| 7| 4| 7| 7| 7| 7|            |
                             DAY ON TEST   | 3| 2| 0| 3| 3| 3| 7| 3| 8| 5| 3| 3| 3| 7| 2| 4| 1| 3| 3| 3| 8| 3| 3| 3| 3|            |
                                           | 1| 0| 2| 1| 1| 4| 9| 4| 2| 4| 4| 4| 5| 6| 1| 5| 6| 5| 5| 5| 7| 6| 6| 6| 6|            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     O      |
   FISCHER 344 RATS MALE                   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     T      |
                               ANIMAL ID   | 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 3| 3| 3| 3| 3|     A      |
    3 PPM                                  | 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 8| 8| 8| 8| 8| 9| 9| 9| 9| 9| 0| 0| 0| 0| 0|     L      |
    1-1                                    | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|            |
 __________________________________________________________________________________________________________________________________ 
 INTEGUMENTARY SYSTEM - cont               |                                                                          |            |
                                           |                                                                          |            |
      Sebaceous Gland, Adenoma             |                                                                          |          1 |
      Subcutaneous Tissue, Fibroma         |                      X     X              X                              |          6 |
      Subcutaneous Tissue, Fibrosarcoma    |                         X                                                |          3 |
 _____________________________________________________________________________________________________________________|            |
 MUSCULOSKELETAL SYSTEM                    |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Bone                                    |    +  +           +     +  +           +  +  +  +           +            |  16        |
      Femur, Osteosarcoma                  |                                                 X                        |          1 |
 _____________________________________________________________________________________________________________________|            |
 NERVOUS SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Brain                                   |    +  +           +     +  +           +  +  +  +           +            |  16        |
                                            __________________________________________________________________________|____________|
   Spinal Cord                             |                                                                          |   1        |
 _____________________________________________________________________________________________________________________|            |
 RESPIRATORY SYSTEM                        |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Lung                                    |    +  +           +     +  +           +  +  +  +           +            |  17        |
      Alveolar/Bronchiolar Adenoma         |                                                                          |          2 |
      Alveolar/Bronchiolar Carcinoma       |                                                                          |          1 |
      Chordoma, Metastatic, Uncertain      |                                                                          |            |
          Primary Site                     |                                                                          |          1 |
      Fibrosarcoma, Metastatic, Skin       |                         X                                                |          1 |
      Leukemia Mononuclear                 |    X  X           X        X              X  X                           |          9 |
      Osteosarcoma, Metastatic, Bone       |                                                 X                        |          1 |
      Pheochromocytoma Complex, Metastatic,|                                                                          |            |
           Adrenal Gland                   |                                                             X            |          1 |
      Mediastinum, Alveolar/Bronchiolar    |                                                                          |            |
          Carcinoma, Metastatic, Lung      |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Nose                                    |    +  +           +     +  +           +  +  +  +           +            |  16        |
                                            __________________________________________________________________________|____________|
   Trachea                                 |    +  +           +     +  +           +  +  +  +           +            |  16        |
 _____________________________________________________________________________________________________________________|            |
 SPECIAL SENSES SYSTEM                     |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Eye                                     |          +        +                                               +      |   4        |
 _____________________________________________________________________________________________________________________|            |
 URINARY SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Kidney                                  | +  +  +           +     +  +           +  +  +  +           +            |  20        |
                                            __________________________________________________________________________|____________|
   Urinary Bladder                         |    +  +           +     +  +           +  +  +  +           +  +         |  17        |
 __________________________________________________________________________________________________________________________________ 
 SYSTEMIC LESIONS                          |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Multiple Organs                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 | X  X  X  X     X  X  X  X  X  X  X        X  X     X     X        X  X   |         32 |
 __________________________________________________________________________________________________________________________________ 
                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  
                                                             Page  71                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 7| 7| 5| 7| 6| 7| 7| 5| 7| 5| 7| 7| 7| 6| 7| 7| 7| 7| 6| 7| 7| 7| 7| 7| 7|             
                             DAY ON TEST   | 2| 2| 6| 2| 8| 1| 2| 6| 1| 9| 2| 2| 1| 7| 2| 2| 2| 3| 6| 3| 3| 3| 0| 3| 3|             
                                           | 7| 7| 8| 7| 6| 6| 8| 3| 7| 7| 8| 8| 4| 4| 9| 9| 9| 0| 9| 0| 0| 1| 7| 1| 1|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   FISCHER 344 RATS MALE                   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
                               ANIMAL ID   | 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3|             
    10 PPM                                 | 1| 1| 1| 1| 1| 2| 2| 2| 2| 2| 3| 3| 3| 3| 3| 4| 4| 4| 4| 4| 5| 5| 5| 5| 5|             
     0-3                                   | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|             
 _____________________________________________________________________________________________________________________|             
 ALIMENTARY SYSTEM                         |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Esophagus                               |       +     +  +     +  +  +        +  +              +           +      |             
                                            __________________________________________________________________________|             
   Intestine Large                         |       +     +  +     +  +  +        +  +              +           +      |             
                                            __________________________________________________________________________|             
   Intestine Large, Cecum                  |       +     +  +     +  +  +        +  +              +           +      |             
                                            __________________________________________________________________________|             
   Intestine Large, Colon                  |       +     +  +     +  +  +        +  +              +           +      |             
                                            __________________________________________________________________________|             
   Intestine Large, Rectum                 |       +     +  +     +  +  +        +  +              +           +      |             
                                            __________________________________________________________________________|             
   Intestine Small                         |       +  +  +  +     +  +  +        +  +              +           +      |             
                                            __________________________________________________________________________|             
   Intestine Small, Duodenum               |       +     +  +     +  +  +        +  +              +           +      |             
                                            __________________________________________________________________________|             
   Intestine Small, Ileum                  |       +  +  +  +     +  +  +        +  +              +           +      |             
      Adenocarcinoma                       |                                                                   X      |             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Intestine Small, Jejunum                |       +     +  +     +  +  +        +  +                          +      |             
      Adenocarcinoma                       |                                                                          |             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Liver                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenocarcinoma, Metastatic,          |                                                                          |             
          Intestine Small                  |                                                                   X      |             
      Hepatocellular Carcinoma             |                                                                          |             
      Hepatocellular Adenoma               |                         X     X                                      X   |             
      Hepatocellular Adenoma, Multiple     | X              X                                         X               |             
      Leukemia Mononuclear                 | X  X        X  X     X  X  X  X  X  X        X  X  X  X  X     X        X|             
                                            __________________________________________________________________________|             
   Mesentery                               |                                              +                           |             
                                            __________________________________________________________________________|             
   Pancreas                                |       +     +  +     +  +  +        +  +              +           +      |             
      Leukemia Mononuclear                 |                            X                                             |             
      Acinus, Adenoma                      |                                                                          |             
                                            __________________________________________________________________________|             
   Salivary Glands                         |       +     +  +     +  +  +        +  +              +           +      |             
                                            __________________________________________________________________________|             
   Stomach                                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Stomach, Forestomach                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Squamous Cell Carcinoma              |                            X                                             |             
      Squamous Cell Papilloma              |                                                                          |             
                                            __________________________________________________________________________|             
   Stomach, Glandular                      | +  +  +  +  +     +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Tooth                                   |                                                                          |             
      Gingiva, Squamous Cell Carcinoma     |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 CARDIOVASCULAR SYSTEM                     |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Heart                                   |       +     +  +     +  +  +        +  +              +           +      |             
      Leukemia Mononuclear                 |             X              X                                             |             
 _____________________________________________________________________________________________________________________|             
 ENDOCRINE SYSTEM                          |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Adrenal Gland                           |       +     +  +     +  +  +        +  +              +           +      |             
                                            __________________________________________________________________________|             
   Adrenal Gland, Cortex                   |       +     +  +     +  +  +        +  +              +           +      |             
      Leukemia Mononuclear                 |             X  X           X                                             |             
                                            __________________________________________________________________________|             
   Adrenal Gland, Medulla                  |       +     +  +     +  +  +        +  +              +           +      |             
      Leukemia Mononuclear                 |             X  X           X                                             |             
      Pheochromocytoma Malignant           |                                                                          |             
 _____________________________________________________________________________________________________________________|             
                                                             Page  72                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 7| 7| 5| 7| 6| 7| 7| 5| 7| 5| 7| 7| 7| 6| 7| 7| 7| 7| 6| 7| 7| 7| 7| 7| 7|             
                             DAY ON TEST   | 2| 2| 6| 2| 8| 1| 2| 6| 1| 9| 2| 2| 1| 7| 2| 2| 2| 3| 6| 3| 3| 3| 0| 3| 3|             
                                           | 7| 7| 8| 7| 6| 6| 8| 3| 7| 7| 8| 8| 4| 4| 9| 9| 9| 0| 9| 0| 0| 1| 7| 1| 1|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   FISCHER 344 RATS MALE                   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
                               ANIMAL ID   | 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3|             
    10 PPM                                 | 1| 1| 1| 1| 1| 2| 2| 2| 2| 2| 3| 3| 3| 3| 3| 4| 4| 4| 4| 4| 5| 5| 5| 5| 5|             
     0-3                                   | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|             
 _____________________________________________________________________________________________________________________|             
 ENDOCRINE SYSTEM - cont                   |                                                                          |             
                                           |                                                                          |             
      Pheochromocytoma Benign              |                                                                          |             
                                            __________________________________________________________________________|             
   Islets, Pancreatic                      |       +     +  +     +  +  +        +  +              +           +      |             
      Adenoma                              |                                                                          |             
                                            __________________________________________________________________________|             
   Parathyroid Gland                       |       +     +  +     +  +  +        +  +              +           +      |             
      Adenoma                              |                                                                          |             
                                            __________________________________________________________________________|             
   Pituitary Gland                         |    +  +     +  +     +  +  +     +  +  +     +        +        +  +      |             
      Pars Distalis, Adenoma               |    X           X        X              X     X        X        X         |             
      Pars Distalis, Adenoma, Multiple     |                                                                          |             
      Pars Distalis, Leukemia Mononuclear  |                            X                                             |             
                                            __________________________________________________________________________|             
   Thyroid Gland                           |       +     +  +     +  +  +        +  +              +           +      |             
      Bilateral, C-Cell, Adenoma           |                                                                          |             
      C-Cell, Adenoma                      |       X        X                                      X                  |             
      Follicular Cell, Adenoma             |                X                                                         |             
      Follicular Cell, Carcinoma           |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 GENERAL BODY SYSTEM                       |                                                                          |             
                                           |                                                                          |             
    None                                   |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 GENITAL SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Epididymis                              |       +     +  +     +  +  +        +  +              +           +      |             
      Leukemia Mononuclear                 |                                                                          |             
      Serosa, Mesothelioma Malignant       |                                                                          |             
                                            __________________________________________________________________________|             
   Preputial Gland                         |       +     +  +  +  +  +  +        +  +  +     +     +        +  M      |             
      Carcinoma                            |                                     X  X  X     X                        |             
                                            __________________________________________________________________________|             
   Prostate                                |       +     +  +     +  +  +        +  +              +           +      |             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Testes                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Bilateral, Interstitial Cell, Adenoma| X  X  X  X  X  X  X  X  X  X  X  X  X     X  X  X  X  X  X  X  X  X  X  X|             
      Interstitial Cell, Adenoma           |                                        X                                 |             
      Tunic, Mesothelioma Malignant        |             X                                                            |             
 _____________________________________________________________________________________________________________________|             
 HEMATOPOIETIC SYSTEM                      |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Bone Marrow                             |       +     +  +     +  +  +        +  +              +           +      |             
      Femoral, Leukemia Mononuclear        |                      X     X                                             |             
                                            __________________________________________________________________________|             
   Lymph Node                              |       +     +  +     +  +  +        +  +              +           +      |             
      Mandibular, Leukemia Mononuclear     |                X     X  X  X                                             |             
      Mediastinal, Leukemia Mononuclear    |                X           X                                             |             
      Pancreatic, Leukemia Mononuclear     |                                                                          |             
      Renal, Leukemia Mononuclear          |                            X                                             |             
                                            __________________________________________________________________________|             
   Lymph Node, Mesenteric                  |       +                    +                                      +      |             
      Leukemia Mononuclear                 |                            X                                             |             
                                            __________________________________________________________________________|             
   Lymph Node, Thoracic                    |       +                                                                  |             
                                            __________________________________________________________________________|             
   Spleen                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X  X        X  X     X  X  X  X  X  X        X  X  X  X  X     X        X|             
 _____________________________________________________________________________________________________________________|             
                                                             Page  73                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 7| 7| 5| 7| 6| 7| 7| 5| 7| 5| 7| 7| 7| 6| 7| 7| 7| 7| 6| 7| 7| 7| 7| 7| 7|             
                             DAY ON TEST   | 2| 2| 6| 2| 8| 1| 2| 6| 1| 9| 2| 2| 1| 7| 2| 2| 2| 3| 6| 3| 3| 3| 0| 3| 3|             
                                           | 7| 7| 8| 7| 6| 6| 8| 3| 7| 7| 8| 8| 4| 4| 9| 9| 9| 0| 9| 0| 0| 1| 7| 1| 1|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   FISCHER 344 RATS MALE                   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
                               ANIMAL ID   | 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3|             
    10 PPM                                 | 1| 1| 1| 1| 1| 2| 2| 2| 2| 2| 3| 3| 3| 3| 3| 4| 4| 4| 4| 4| 5| 5| 5| 5| 5|             
     0-3                                   | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|             
 _____________________________________________________________________________________________________________________|             
 HEMATOPOIETIC SYSTEM - cont               |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Thymus                                  |       M     +  +     +  +  +        M  +              +           M      |             
      Leukemia Mononuclear                 |                            X                                             |             
 _____________________________________________________________________________________________________________________|             
 INTEGUMENTARY SYSTEM                      |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Mammary Gland                           |             +  +     +  +  +        +  M              +                 +|             
      Fibroadenoma                         |                                                                         X|             
                                            __________________________________________________________________________|             
   Skin                                    |       +     +  +  +  +  +  +        +  +     +        +     +     +      |             
      Fibroma                              |                                              X                           |             
      Trichoepithelioma                    |                                                             X            |             
      Subcutaneous Tissue, Fibroma         |                   X                                                      |             
      Subcutaneous Tissue, Fibrosarcoma    |       X                                                                  |             
      Subcutaneous Tissue,                 |                                                                          |             
          Neurofibrosarcoma                |                         X                                                |             
 _____________________________________________________________________________________________________________________|             
 MUSCULOSKELETAL SYSTEM                    |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Bone                                    |       +     +  +     +  +  +        +  +              +           +      |             
 _____________________________________________________________________________________________________________________|             
 NERVOUS SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Brain                                   |       +     +  +     +  +  +        +  +  +           +           +      |             
 _____________________________________________________________________________________________________________________|             
 RESPIRATORY SYSTEM                        |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Lung                                    |       +     +  +     +  +  +        +  +              +           +      |             
      Alveolar/Bronchiolar Adenoma         |                                                                          |             
      Alveolar/Bronchiolar Carcinoma       |                                     X                                    |             
      Leukemia Mononuclear                 |             X  X     X     X                                             |             
                                            __________________________________________________________________________|             
   Nose                                    |       +     +  +     +  +  +        +  +              +           +      |             
                                            __________________________________________________________________________|             
   Trachea                                 |       +     +  +     +  +  +        +  +              +           +      |             
 _____________________________________________________________________________________________________________________|             
 SPECIAL SENSES SYSTEM                     |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Eye                                     |                         +     +     +        +                           |             
 _____________________________________________________________________________________________________________________|             
 URINARY SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Kidney                                  | +  +  +     +  +     +  +  +        +  +              +           +      |             
      Leukemia Mononuclear                 |             X  X           X                                             |             
                                            __________________________________________________________________________|             
   Urinary Bladder                         |       +     +  +     +  +  +        +  +              +           +      |             
 _____________________________________________________________________________________________________________________|             
 SYSTEMIC LESIONS                          |                                                                          |             
                                            __________________________________________________________________________|             
   Multiple Organs                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X  X        X  X     X  X  X  X  X  X        X  X  X  X  X     X        X|             
      Mesothelioma Malignant               |             X                                                            |             
 _____________________________________________________________________________________________________________________|             
                                                             Page  74                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 7| 7| 5| 6| 7| 7| 6| 7| 7| 7| 5| 7| 6| 7| 6| 6| 6| 7| 6| 7| 5| 6| 5| 7| 6|            |
                             DAY ON TEST   | 0| 3| 7| 8| 3| 3| 5| 2| 3| 0| 6| 3| 7| 3| 6| 8| 9| 2| 9| 3| 0| 0| 8| 3| 7|            |
                                           | 0| 4| 3| 5| 4| 4| 6| 2| 5| 0| 0| 0| 9| 6| 1| 3| 3| 1| 5| 6| 3| 9| 2| 6| 8|            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     O      |
   FISCHER 344 RATS MALE                   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     T      |
                               ANIMAL ID   | 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 4| 4| 4| 4| 4|     A      |
    10 PPM                                 | 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 8| 8| 8| 8| 8| 9| 9| 9| 9| 9| 0| 0| 0| 0| 0|     L      |
     0-3                                   | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|            |
 __________________________________________________________________________________________________________________________________ 
 ALIMENTARY SYSTEM                         |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Esophagus                               | +     +  +        +  +     +  +  +  +     M  +  +  +  +     +  +  +     +|  27        |
                                            __________________________________________________________________________|____________|
   Intestine Large                         | +     +  +        +  +     +  +  +  +     A  +  +  +  +     +  +  +     +|  27        |
                                            __________________________________________________________________________|____________|
   Intestine Large, Cecum                  | +     +  A        +  +     +  +  +  +     A  +  +  +  +     +  +  +     +|  26        |
                                            __________________________________________________________________________|____________|
   Intestine Large, Colon                  | +     +  +        +  +     +  +  +  +     A  +  +  +  +     +  +  +     +|  27        |
                                            __________________________________________________________________________|____________|
   Intestine Large, Rectum                 | +     +  +        +  +     +  +  +  +     A  +  +  +  +     +  +  +     +|  27        |
                                            __________________________________________________________________________|____________|
   Intestine Small                         | +  +  +  +        +  +     +  +  +  +     A  +  +  +  +     +  +  +     +|  29        |
                                            __________________________________________________________________________|____________|
   Intestine Small, Duodenum               | +     +  +        +  +     +  +  +  +     A  +  +  +  +     +  +  +     +|  27        |
                                            __________________________________________________________________________|____________|
   Intestine Small, Ileum                  | +     +  +        +  +     +  +  +  +     A  +  +  +  +     +  +  +     +|  28        |
      Adenocarcinoma                       |                                                                          |          1 |
      Leukemia Mononuclear                 |                               X                                          |          1 |
                                            __________________________________________________________________________|____________|
   Intestine Small, Jejunum                | +  +  +  +        +  +     +  +  +  +     A  +  +  +  +     +  +  +     +|  27        |
      Adenocarcinoma                       |    X                                                                     |          1 |
      Leukemia Mononuclear                 |                               X                                          |          1 |
                                            __________________________________________________________________________|____________|
   Liver                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  A  +  +  +  +  +  +  +  +  +  +|  49        |
      Adenocarcinoma, Metastatic,          |                                                                          |            |
          Intestine Small                  |                                                                          |          1 |
      Hepatocellular Carcinoma             |                                              X                          X|          2 |
      Hepatocellular Adenoma               |                                        X                                 |          4 |
      Hepatocellular Adenoma, Multiple     |    X                 X           X                                       |          6 |
      Leukemia Mononuclear                 | X  X  X        X  X  X     X  X  X  X        X        X     X  X     X   |         32 |
                                            __________________________________________________________________________|____________|
   Mesentery                               |             +                                                        +   |   3        |
                                            __________________________________________________________________________|____________|
   Pancreas                                | +     +  +        +  +     +  +  +  +     A  +  +  +  +     +  +  +     +|  27        |
      Leukemia Mononuclear                 |                                                                X         |          2 |
      Acinus, Adenoma                      |                                              X                           |          1 |
                                            __________________________________________________________________________|____________|
   Salivary Glands                         | +     +  +        +  +     +  +  +  +     M  +  +  +  +     +  +  +     +|  27        |
                                            __________________________________________________________________________|____________|
   Stomach                                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  A  +  +  +  +  +  +  +  +  +  +|  49        |
                                            __________________________________________________________________________|____________|
   Stomach, Forestomach                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  A  +  +  +  +  +  +  +  +  +  +|  49        |
      Squamous Cell Carcinoma              |                                                                          |          1 |
      Squamous Cell Papilloma              |                                     X                                    |          1 |
                                            __________________________________________________________________________|____________|
   Stomach, Glandular                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  A  +  +  +  +  +  +  +  +  +  +|  48        |
                                            __________________________________________________________________________|____________|
   Tooth                                   |                                                 +                        |   1        |
      Gingiva, Squamous Cell Carcinoma     |                                                 X                        |          1 |
 _____________________________________________________________________________________________________________________|            |
 CARDIOVASCULAR SYSTEM                     |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Heart                                   | +     +  +        +  +     +  +  +  +     M  +  +  +  +     +  +  +     +|  27        |
      Leukemia Mononuclear                 |                               X                                          |          3 |
 _____________________________________________________________________________________________________________________|            |
 ENDOCRINE SYSTEM                          |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Adrenal Gland                           | +     +  +     +  +  +     +  +  +  +     +  +  +  +  +     +  +  +     +|  29        |
 __________________________________________________________________________________________________________________________________ 
                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  
                                                             Page  75                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 7| 7| 5| 6| 7| 7| 6| 7| 7| 7| 5| 7| 6| 7| 6| 6| 6| 7| 6| 7| 5| 6| 5| 7| 6|            |
                             DAY ON TEST   | 0| 3| 7| 8| 3| 3| 5| 2| 3| 0| 6| 3| 7| 3| 6| 8| 9| 2| 9| 3| 0| 0| 8| 3| 7|            |
                                           | 0| 4| 3| 5| 4| 4| 6| 2| 5| 0| 0| 0| 9| 6| 1| 3| 3| 1| 5| 6| 3| 9| 2| 6| 8|            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     O      |
   FISCHER 344 RATS MALE                   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     T      |
                               ANIMAL ID   | 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 4| 4| 4| 4| 4|     A      |
    10 PPM                                 | 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 8| 8| 8| 8| 8| 9| 9| 9| 9| 9| 0| 0| 0| 0| 0|     L      |
     0-3                                   | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|            |
 __________________________________________________________________________________________________________________________________ 
 ENDOCRINE SYSTEM - cont                   |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Adrenal Gland, Cortex                   | +     +  +     +  +  +     +  +  +  +     A  +  +  +  +     +  +  +     +|  28        |
      Leukemia Mononuclear                 | X     X                    X  X              X              X  X         |         10 |
                                            __________________________________________________________________________|____________|
   Adrenal Gland, Medulla                  | +     +  +     +  +  +     +  +  +  +     +  +  +  +  +     +  +  +     +|  29        |
      Leukemia Mononuclear                 | X     X                    X  X              X              X  X         |         10 |
      Pheochromocytoma Malignant           |                X                                                         |          1 |
      Pheochromocytoma Benign              |                                           X                              |          1 |
                                            __________________________________________________________________________|____________|
   Islets, Pancreatic                      | +     +  +        +  +     +  +  +  +     A  +  +  +  +     +  +  +     +|  27        |
      Adenoma                              |       X                                                                  |          1 |
                                            __________________________________________________________________________|____________|
   Parathyroid Gland                       | +     +  +        +  +     +  +  +  +     M  +  +  +  +     +  +  +     +|  27        |
      Adenoma                              |                                                                         X|          1 |
                                            __________________________________________________________________________|____________|
   Pituitary Gland                         | +     +  +        +  +  +  +  +  +  +     I  +  +  +  +     +  +  +     +|  32        |
      Pars Distalis, Adenoma               |                         X  X        X                                   X|         11 |
      Pars Distalis, Adenoma, Multiple     |                                                    X                     |          1 |
      Pars Distalis, Leukemia Mononuclear  |       X                                                        X         |          3 |
                                            __________________________________________________________________________|____________|
   Thyroid Gland                           | +     +  +        +  +     +  +  +  +     M  +  +  +  +  +  +  +  +     +|  28        |
      Bilateral, C-Cell, Adenoma           |                                                       X                  |          1 |
      C-Cell, Adenoma                      |                      X     X  X     X                                   X|          8 |
      Follicular Cell, Adenoma             |                                                                          |          1 |
      Follicular Cell, Carcinoma           |                                                          X               |          1 |
 _____________________________________________________________________________________________________________________|            |
 GENERAL BODY SYSTEM                       |                                                                          |            |
                                           |                                                                          |            |
    None                                   |                                                                          |            |
 _____________________________________________________________________________________________________________________|            |
 GENITAL SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Epididymis                              | +     +  +        +  +     +  +  +  +     +  +  +  +  +     +  +  +     +|  28        |
      Leukemia Mononuclear                 |                               X                                          |          1 |
      Serosa, Mesothelioma Malignant       |                            X                                             |          1 |
                                            __________________________________________________________________________|____________|
   Preputial Gland                         | +     +  +  +     +  +     +  +  +  +     +  +  +  +  +     +  +  +     +|  32        |
      Carcinoma                            |                                                                          |          4 |
                                            __________________________________________________________________________|____________|
   Prostate                                | +     +  +        +  +     +  +  +  +     +  +  +  +  +     +  +  +     +|  28        |
      Leukemia Mononuclear                 | X                                                                        |          1 |
                                            __________________________________________________________________________|____________|
   Testes                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Bilateral, Interstitial Cell, Adenoma| X  X  X  X  X  X  X  X  X  X  X  X     X  X  X  X  X     X     X  X  X   |         45 |
      Interstitial Cell, Adenoma           |                                                       X     X           X|          4 |
      Tunic, Mesothelioma Malignant        |                            X                                             |          2 |
 _____________________________________________________________________________________________________________________|            |
 HEMATOPOIETIC SYSTEM                      |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Bone Marrow                             | +     +  +        +  +     +  +  +  +     A  +  +  +  +     +  +  +     +|  27        |
      Femoral, Leukemia Mononuclear        | X                 X  X        X              X                           |          7 |
 __________________________________________________________________________________________________________________________________ 
                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  
                                                             Page  76                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 7| 7| 5| 6| 7| 7| 6| 7| 7| 7| 5| 7| 6| 7| 6| 6| 6| 7| 6| 7| 5| 6| 5| 7| 6|            |
                             DAY ON TEST   | 0| 3| 7| 8| 3| 3| 5| 2| 3| 0| 6| 3| 7| 3| 6| 8| 9| 2| 9| 3| 0| 0| 8| 3| 7|            |
                                           | 0| 4| 3| 5| 4| 4| 6| 2| 5| 0| 0| 0| 9| 6| 1| 3| 3| 1| 5| 6| 3| 9| 2| 6| 8|            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     O      |
   FISCHER 344 RATS MALE                   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     T      |
                               ANIMAL ID   | 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 4| 4| 4| 4| 4|     A      |
    10 PPM                                 | 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 8| 8| 8| 8| 8| 9| 9| 9| 9| 9| 0| 0| 0| 0| 0|     L      |
     0-3                                   | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|            |
 __________________________________________________________________________________________________________________________________ 
 HEMATOPOIETIC SYSTEM - cont               |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Lymph Node                              | +     +  +        +  +     +  +  +  +     M  +  +  +  +     +  +  +     +|  27        |
      Mandibular, Leukemia Mononuclear     | X     X           X  X     X  X  X  X        X        X     X  X         |         16 |
      Mediastinal, Leukemia Mononuclear    |                   X           X     X        X        X     X  X         |          9 |
      Pancreatic, Leukemia Mononuclear     |                            X                 X                           |          2 |
      Renal, Leukemia Mononuclear          |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Lymph Node, Mesenteric                  | +                 +              +  +        +                          +|   9        |
      Leukemia Mononuclear                 | X                 X              X  X        X                           |          6 |
                                            __________________________________________________________________________|____________|
   Lymph Node, Thoracic                    |                                                                          |   1        |
                                            __________________________________________________________________________|____________|
   Spleen                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  A  +  +  +  +  +  +  +  +  +  +|  49        |
      Leukemia Mononuclear                 | X  X  X     X  X  X  X     X  X  X  X        X        X     X  X     X   |         33 |
                                            __________________________________________________________________________|____________|
   Thymus                                  | +     +  +        +  +     I  +  +  +     M  M  +  +  +     +  +  +     +|  22        |
      Leukemia Mononuclear                 | X                                                                        |          2 |
 _____________________________________________________________________________________________________________________|            |
 INTEGUMENTARY SYSTEM                      |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Mammary Gland                           | +                 +  +  +  +  +  +  +           +  +  +     +  +  +     +|  23        |
      Fibroadenoma                         |                         X                       X  X                     |          4 |
                                            __________________________________________________________________________|____________|
   Skin                                    | +     +  +        +  +     +  +  +  +     +  +  +  +  +     +  +  +     +|  31        |
      Fibroma                              |                                                                          |          1 |
      Trichoepithelioma                    |                                                                          |          1 |
      Subcutaneous Tissue, Fibroma         |                                                                          |          1 |
      Subcutaneous Tissue, Fibrosarcoma    |                                                                   X      |          2 |
      Subcutaneous Tissue,                 |                                                                          |            |
          Neurofibrosarcoma                |                                                                          |          1 |
 _____________________________________________________________________________________________________________________|            |
 MUSCULOSKELETAL SYSTEM                    |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Bone                                    | +     +  +        +  +     +  +  +  +     +  +  +  +  +     +  +  +     +|  28        |
 _____________________________________________________________________________________________________________________|            |
 NERVOUS SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Brain                                   | +     +  +        +  +     +  +  +  +     +  +  +  +  +     +  +  +     +|  29        |
 _____________________________________________________________________________________________________________________|            |
 RESPIRATORY SYSTEM                        |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Lung                                    | +     +  +        +  +     +  +  +  +  +  M  +  +  +  +     +  +  +     +|  28        |
      Alveolar/Bronchiolar Adenoma         |                                        X                                 |          1 |
      Alveolar/Bronchiolar Carcinoma       |                                                                          |          1 |
      Leukemia Mononuclear                 | X     X           X  X     X  X  X  X        X        X     X  X         |         16 |
                                            __________________________________________________________________________|____________|
   Nose                                    | +     +  +        +  +     +  +  +  +     A  +  +  +  +     +  +  +     +|  27        |
                                            __________________________________________________________________________|____________|
   Trachea                                 | +     +  +        +  +     +  +  +  +     M  +  +  +  +     +  +  +     +|  27        |
 _____________________________________________________________________________________________________________________|            |
 SPECIAL SENSES SYSTEM                     |                                                                          |            |
                                           |                                                                          |            |
 __________________________________________________________________________________________________________________________________ 
                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  
                                                             Page  77                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 7| 7| 5| 6| 7| 7| 6| 7| 7| 7| 5| 7| 6| 7| 6| 6| 6| 7| 6| 7| 5| 6| 5| 7| 6|            |
                             DAY ON TEST   | 0| 3| 7| 8| 3| 3| 5| 2| 3| 0| 6| 3| 7| 3| 6| 8| 9| 2| 9| 3| 0| 0| 8| 3| 7|            |
                                           | 0| 4| 3| 5| 4| 4| 6| 2| 5| 0| 0| 0| 9| 6| 1| 3| 3| 1| 5| 6| 3| 9| 2| 6| 8|            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     O      |
   FISCHER 344 RATS MALE                   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     T      |
                               ANIMAL ID   | 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 4| 4| 4| 4| 4|     A      |
    10 PPM                                 | 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 8| 8| 8| 8| 8| 9| 9| 9| 9| 9| 0| 0| 0| 0| 0|     L      |
     0-3                                   | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|            |
 __________________________________________________________________________________________________________________________________ 
 SPECIAL SENSES SYSTEM - cont              |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Eye                                     |                            +                             +              +|   7        |
 _____________________________________________________________________________________________________________________|            |
 URINARY SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Kidney                                  | +     +  +        +  +     +  +  +  +     +  +  +  +  +  +  +  +  +  +  +|  32        |
      Leukemia Mononuclear                 |                               X                                          |          4 |
                                            __________________________________________________________________________|____________|
   Urinary Bladder                         | +     +  +        +  +     +  +  +  +     A  +  +  +  +     +  +  +     +|  27        |
 __________________________________________________________________________________________________________________________________ 
 SYSTEMIC LESIONS                          |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Multiple Organs                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 | X  X  X     X  X  X  X     X  X  X  X        X        X     X  X     X   |         33 |
      Mesothelioma Malignant               |                            X                                             |          2 |
 __________________________________________________________________________________________________________________________________ 
                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  
                                                             Page  78                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 7| 6| 7| 7| 7| 6| 5| 7| 5| 6| 7| 7| 7| 7| 7| 6| 7| 7| 7| 7| 4| 6| 6| 6| 7|             
                             DAY ON TEST   | 2| 1| 2| 2| 1| 7| 2| 2| 1| 2| 0| 0| 2| 2| 2| 9| 3| 3| 3| 3| 8| 8| 7| 9| 3|             
                                           | 7| 9| 7| 8| 0| 3| 9| 8| 0| 6| 3| 1| 9| 9| 9| 3| 0| 0| 0| 1| 4| 9| 6| 3| 1|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   FISCHER 344 RATS MALE                   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
                               ANIMAL ID   | 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4|             
    10 PPM                                 | 1| 1| 1| 1| 1| 2| 2| 2| 2| 2| 3| 3| 3| 3| 3| 4| 4| 4| 4| 4| 5| 5| 5| 5| 5|             
     3-3                                   | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|             
 _____________________________________________________________________________________________________________________|             
 ALIMENTARY SYSTEM                         |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Esophagus                               |    +        +  +  +     +  +  +  +           +              +  +  +  +   |             
                                            __________________________________________________________________________|             
   Intestine Large                         |    +        +  +  +     +  +  +  +           +              +  +  +  +   |             
                                            __________________________________________________________________________|             
   Intestine Large, Cecum                  |    +        +  +  +     +  +  +  +           +              +  +  +  +   |             
                                            __________________________________________________________________________|             
   Intestine Large, Colon                  |    +        +  +  +     +  +  +  +           +              +  +  +  +   |             
                                            __________________________________________________________________________|             
   Intestine Large, Rectum                 |    +        +  +  M     +  +  +  +           +              +  +  +  +   |             
                                            __________________________________________________________________________|             
   Intestine Small                         |    +        +  +  +     +  +  +  +           +              +  +  +  +   |             
                                            __________________________________________________________________________|             
   Intestine Small, Duodenum               |    +        +  +  +     +  +  +  +           +              +  +  +  +   |             
                                            __________________________________________________________________________|             
   Intestine Small, Ileum                  |    +        +  +  M     +  +  +  +           +              +  +  +  +   |             
                                            __________________________________________________________________________|             
   Intestine Small, Jejunum                |    +        +  +  A     +  +  +  +           +              +  +  +  +   |             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Liver                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Hepatocellular Carcinoma             |                                                          X               |             
      Hepatocellular Adenoma               |                      X                    X        X  X     X           X|             
      Hepatocellular Adenoma, Multiple     |             X                                                            |             
      Leukemia Mononuclear                 | X  X  X  X  X  X              X     X     X  X  X  X  X  X  X  X  X  X  X|             
                                            __________________________________________________________________________|             
   Mesentery                               |       +                                                                  |             
      Leukemia Mononuclear                 |       X                                                                  |             
                                            __________________________________________________________________________|             
   Pancreas                                |    +  +     +  +  +     +  +  +  +           +              +  +  +  +   |             
      Leukemia Mononuclear                 |    X  X                                                                  |             
      Acinus, Adenoma                      |                X        X                                            X   |             
                                            __________________________________________________________________________|             
   Salivary Glands                         |    +        M  +  +     +  +  +  +           +              +  +  +  +   |             
      Leukemia Mononuclear                 |    X                                                                     |             
                                            __________________________________________________________________________|             
   Stomach                                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Stomach, Forestomach                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Stomach, Glandular                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |       X                                                                  |             
                                            __________________________________________________________________________|             
   Tongue                                  |                                              +                           |             
      Squamous Cell Carcinoma              |                                              X                           |             
 _____________________________________________________________________________________________________________________|             
 CARDIOVASCULAR SYSTEM                     |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Heart                                   |    +        +  +  +     +  +  +  +           +              +  +  +  +   |             
      Leukemia Mononuclear                 |    X                                                           X         |             
 _____________________________________________________________________________________________________________________|             
 ENDOCRINE SYSTEM                          |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Adrenal Gland                           |    +        +  +  +     +  +  +  +           +              +  +  +  +   |             
                                            __________________________________________________________________________|             
   Adrenal Gland, Cortex                   |    +        +  +  +     +  +  +  +           +              +  +  +  +   |             
      Leukemia Mononuclear                 |                               X                                X         |             
                                            __________________________________________________________________________|             
   Adrenal Gland, Medulla                  |    +        +  +  +     +  +  +  +           +              +  +  +  +   |             
      Leukemia Mononuclear                 |                               X                                X         |             
      Pheochromocytoma Malignant           |                                                                          |             
      Pheochromocytoma Benign              |                                  X                                       |             
                                            __________________________________________________________________________|             
   Islets, Pancreatic                      |    +        +  +  +     +  +  +  +           +              +  +  +  +   |             
      Adenoma                              |                                                                          |             
 _____________________________________________________________________________________________________________________|             
                                                             Page  79                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 7| 6| 7| 7| 7| 6| 5| 7| 5| 6| 7| 7| 7| 7| 7| 6| 7| 7| 7| 7| 4| 6| 6| 6| 7|             
                             DAY ON TEST   | 2| 1| 2| 2| 1| 7| 2| 2| 1| 2| 0| 0| 2| 2| 2| 9| 3| 3| 3| 3| 8| 8| 7| 9| 3|             
                                           | 7| 9| 7| 8| 0| 3| 9| 8| 0| 6| 3| 1| 9| 9| 9| 3| 0| 0| 0| 1| 4| 9| 6| 3| 1|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   FISCHER 344 RATS MALE                   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
                               ANIMAL ID   | 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4|             
    10 PPM                                 | 1| 1| 1| 1| 1| 2| 2| 2| 2| 2| 3| 3| 3| 3| 3| 4| 4| 4| 4| 4| 5| 5| 5| 5| 5|             
     3-3                                   | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|             
 _____________________________________________________________________________________________________________________|             
 ENDOCRINE SYSTEM - cont                   |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Parathyroid Gland                       |    +        +  +  +     +  +  +  +           +              +  +  +  +   |             
                                            __________________________________________________________________________|             
   Pituitary Gland                         |    +        +  +  +     +  +  +  +           +              +  +  +  +   |             
      Pars Distalis, Adenoma               |             X              X     X           X                 X     X   |             
      Pars Distalis, Leukemia Mononuclear  |    X                          X                                          |             
                                            __________________________________________________________________________|             
   Thyroid Gland                           |    +        +  +  +     +  +  +  +           +              +  +  +  +   |             
      C-Cell, Adenoma                      |                                                                          |             
      C-Cell, Carcinoma                    |                                  X                                       |             
      Follicular Cell, Adenoma             |                            X                                      X      |             
 _____________________________________________________________________________________________________________________|             
 GENERAL BODY SYSTEM                       |                                                                          |             
                                           |                                                                          |             
    None                                   |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 GENITAL SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Epididymis                              |    +        +  +  +     +  +  +              +              +  +  +  +   |             
      Serosa, Mesothelioma Malignant       |             X                                                            |             
                                            __________________________________________________________________________|             
   Preputial Gland                         | +  +        +  +  +     +  +  +  +           +              +  +  +  +   |             
      Adenoma                              |                                                                          |             
      Carcinoma                            | X              X                                                         |             
                                            __________________________________________________________________________|             
   Prostate                                |    +        +  +  +     +  +  +  +           +              +  +  +  +   |             
      Leukemia Mononuclear                 |    X                                                                     |             
                                            __________________________________________________________________________|             
   Seminal Vesicle                         |                                                                          |             
                                            __________________________________________________________________________|             
   Testes                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Bilateral, Interstitial Cell, Adenoma| X     X  X  X  X  X  X        X  X  X  X  X  X  X  X  X  X     X  X  X  X|             
      Interstitial Cell, Adenoma           |    X                    X                                   X            |             
      Tunic, Mesothelioma Malignant        |             X                                                            |             
 _____________________________________________________________________________________________________________________|             
 HEMATOPOIETIC SYSTEM                      |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Bone Marrow                             |    +        +  +  +     +  +  +  +           +              +  +  +  +   |             
      Femoral, Leukemia Mononuclear        |    X                          X                             X  X         |             
                                            __________________________________________________________________________|             
   Lymph Node                              |    +     +  M  +  +     +  +  +  +           +              +  +  +  +   |             
      Deep Cervical, Leukemia Mononuclear  |                                                                          |             
      Mandibular, Leukemia Mononuclear     |    X                          X              X              X  X  X  X   |             
      Mediastinal, Fibrosarcoma,           |                                                                          |             
          Metastatic, Skin                 |                                                                          |             
      Mediastinal, Leukemia Mononuclear    |    X                          X              X                 X         |             
      Pancreatic, Leukemia Mononuclear     |                               X                                          |             
      Renal, Leukemia Mononuclear          |                                                                          |             
                                            __________________________________________________________________________|             
   Lymph Node, Mesenteric                  |    +     +                       +           +                 +         |             
      Leukemia Mononuclear                 |    X     X                                   X                 X         |             
                                            __________________________________________________________________________|             
   Lymph Node, Thoracic                    |                                  +                                       |             
                                            __________________________________________________________________________|             
   Spleen                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X  X  X  X  X  X              X     X     X  X  X  X  X  X  X  X  X  X  X|             
                                            __________________________________________________________________________|             
   Thymus                                  |    +        +  +  +     +  M  +  +           +              +  +  M  I   |             
      Leukemia Mononuclear                 |    X                                         X                 X         |             
 _____________________________________________________________________________________________________________________|             
                                                             Page  80                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 7| 6| 7| 7| 7| 6| 5| 7| 5| 6| 7| 7| 7| 7| 7| 6| 7| 7| 7| 7| 4| 6| 6| 6| 7|             
                             DAY ON TEST   | 2| 1| 2| 2| 1| 7| 2| 2| 1| 2| 0| 0| 2| 2| 2| 9| 3| 3| 3| 3| 8| 8| 7| 9| 3|             
                                           | 7| 9| 7| 8| 0| 3| 9| 8| 0| 6| 3| 1| 9| 9| 9| 3| 0| 0| 0| 1| 4| 9| 6| 3| 1|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   FISCHER 344 RATS MALE                   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
                               ANIMAL ID   | 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4|             
    10 PPM                                 | 1| 1| 1| 1| 1| 2| 2| 2| 2| 2| 3| 3| 3| 3| 3| 4| 4| 4| 4| 4| 5| 5| 5| 5| 5|             
     3-3                                   | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|             
 _____________________________________________________________________________________________________________________|             
 HEMATOPOIETIC SYSTEM - cont               |                                                                          |             
                                           |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 INTEGUMENTARY SYSTEM                      |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Mammary Gland                           |             +  +  +        +  +  +           +              +        +   |             
                                            __________________________________________________________________________|             
   Skin                                    |    +        +  +  +     +  +  +  +           +              +  +  +  +   |             
      Squamous Cell Papilloma              |                                                                          |             
      Trichoepithelioma                    |                   X                                                      |             
      Subcutaneous Tissue, Fibroma         |                         X     X  X                                X      |             
      Subcutaneous Tissue, Fibrosarcoma    |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 MUSCULOSKELETAL SYSTEM                    |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Bone                                    |    +        +  +  +     +  +  +  +           +              +  +  +  +   |             
 _____________________________________________________________________________________________________________________|             
 NERVOUS SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Brain                                   |    +        +  +  +     +  +  +  +           +              +  +  +  +   |             
      Glioma Malignant                     |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 RESPIRATORY SYSTEM                        |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Lung                                    |    +        +  +  +     +  +  +  +           +              +  +  +  +   |             
      Alveolar/Bronchiolar Carcinoma       |                                                                          |             
      Carcinoma Adenosquamous              |                                                                          |             
      Fibrosarcoma, Metastatic, Skin       |                                                                          |             
      Leukemia Mononuclear                 |    X                          X              X              X  X  X      |             
                                            __________________________________________________________________________|             
   Nose                                    |    +        +  +  +     +  +  +  +           +              +  +  +  +   |             
                                            __________________________________________________________________________|             
   Trachea                                 |    +        +  +  +     +  +  +  +           +              +  +  +  +   |             
      Peritracheal Tissue, Fibrosarcoma,   |                                                                          |             
           Metastatic, Skin                |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 SPECIAL SENSES SYSTEM                     |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Eye                                     |             +              +                                             |             
 _____________________________________________________________________________________________________________________|             
 URINARY SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Kidney                                  | +  +        +  +  +     +  +  +  +           +              +  +  +  +   |             
      Leukemia Mononuclear                 |    X                                         X                 X         |             
      Renal Tubule, Adenoma                |                            X                                         X   |             
                                            __________________________________________________________________________|             
   Urinary Bladder                         |    +        +  +  +     +  +  +  +           +              +  +  +  +   |             
      Leukemia Mononuclear                 |    X                                                                     |             
 _____________________________________________________________________________________________________________________|             
 SYSTEMIC LESIONS                          |                                                                          |             
                                            __________________________________________________________________________|             
   Multiple Organs                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X  X  X  X  X  X              X     X     X  X  X  X  X  X  X  X  X  X  X|             
      Mesothelioma Malignant               |             X                                                            |             
 _____________________________________________________________________________________________________________________|             
                                                             Page  81                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 6| 5| 7| 7| 7| 7| 7| 7| 4| 5| 4| 6| 6| 7| 7| 6| 5| 6| 5| 4| 6| 6| 6| 6| 6|            |
                             DAY ON TEST   | 5| 8| 3| 3| 3| 3| 3| 3| 9| 1| 9| 7| 8| 3| 3| 4| 4| 9| 8| 5| 2| 1| 6| 9| 9|            |
                                           | 7| 3| 4| 4| 4| 0| 5| 5| 1| 7| 2| 6| 5| 6| 6| 5| 9| 1| 2| 5| 6| 8| 8| 5| 6|            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     O      |
   FISCHER 344 RATS MALE                   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     T      |
                               ANIMAL ID   | 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 5| 5| 5| 5| 5|     A      |
    10 PPM                                 | 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 8| 8| 8| 8| 8| 9| 9| 9| 9| 9| 0| 0| 0| 0| 0|     L      |
     3-3                                   | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|            |
 __________________________________________________________________________________________________________________________________ 
 ALIMENTARY SYSTEM                         |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Esophagus                               | +  +           +        +  +  +  +  +        +  +  +  +  +  +  +  +  +  +|  31        |
                                            __________________________________________________________________________|____________|
   Intestine Large                         | +  +           +        +  +  +  +  +        +  +  +  +  +  +  +  +  +  +|  31        |
                                            __________________________________________________________________________|____________|
   Intestine Large, Cecum                  | +  A           +        +  +  +  +  +        +  +  +  +  +  +  +  +  +  +|  30        |
                                            __________________________________________________________________________|____________|
   Intestine Large, Colon                  | +  +           +        +  +  +  +  +        +  +  +  +  +  +  +  +  +  +|  31        |
                                            __________________________________________________________________________|____________|
   Intestine Large, Rectum                 | +  +           +        +  +  +  +  +        +  +  +  +  +  +  +  +  +  +|  30        |
                                            __________________________________________________________________________|____________|
   Intestine Small                         | +  +           +        +  +  +  +  +        +  +  +  +  +  +  +  +  +  +|  31        |
                                            __________________________________________________________________________|____________|
   Intestine Small, Duodenum               | +  +           +        +  +  +  +  +        +  +  +  +  +  +  +  +  +  +|  31        |
                                            __________________________________________________________________________|____________|
   Intestine Small, Ileum                  | +  +           +        +  +  A  +  +        +  +  +  +  +  +  +  +  +  +|  29        |
                                            __________________________________________________________________________|____________|
   Intestine Small, Jejunum                | +  +           +        +  +  +  +  +        +  +  +  +  +  +  +  +  +  +|  30        |
      Leukemia Mononuclear                 |                         X                                                |          1 |
                                            __________________________________________________________________________|____________|
   Liver                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Hepatocellular Carcinoma             |                                                                          |          1 |
      Hepatocellular Adenoma               |                                                                          |          6 |
      Hepatocellular Adenoma, Multiple     | X           X     X  X                    X  X                           |          7 |
      Leukemia Mononuclear                 | X  X  X  X  X  X  X  X  X  X  X  X  X     X  X     X  X     X  X  X  X  X|         41 |
                                            __________________________________________________________________________|____________|
   Mesentery                               |                                                                          |   1        |
      Leukemia Mononuclear                 |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Pancreas                                | +  +           +        +  +  +  +  +        +  +  +  +  +  +  +  +  +  +|  32        |
      Leukemia Mononuclear                 |                         X                                                |          3 |
      Acinus, Adenoma                      |                                                                          |          3 |
                                            __________________________________________________________________________|____________|
   Salivary Glands                         | +  +           +        +  +  +  +  +        +  +  +  +  +  +  +  +  +  +|  30        |
      Leukemia Mononuclear                 |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Stomach                                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Stomach, Forestomach                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 |                         X                                                |          1 |
                                            __________________________________________________________________________|____________|
   Stomach, Glandular                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Tongue                                  |                                                                          |   1        |
      Squamous Cell Carcinoma              |                                                                          |          1 |
 _____________________________________________________________________________________________________________________|            |
 CARDIOVASCULAR SYSTEM                     |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Heart                                   | +  +           +        +  +  +  +  +        +  +  +  +  +  +  +  +  +  +|  31        |
      Leukemia Mononuclear                 |                         X     X                    X                     |          5 |
 _____________________________________________________________________________________________________________________|            |
 ENDOCRINE SYSTEM                          |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Adrenal Gland                           | +  +           +     +  +  +  +  +  +        +  +  +  +  +  +  +  +  +  +|  32        |
                                            __________________________________________________________________________|____________|
   Adrenal Gland, Cortex                   | +  +           +     M  +  +  +  +  +        +  +  +  +  +  +  +  +  +  +|  31        |
      Leukemia Mononuclear                 |                         X     X              X     X                 X   |          7 |
                                            __________________________________________________________________________|____________|
   Adrenal Gland, Medulla                  | +  +           +     +  +  +  +  +  +        +  +  +  +  +  +  +  +  +  +|  32        |
 __________________________________________________________________________________________________________________________________ 
                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  
                                                             Page  82                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 6| 5| 7| 7| 7| 7| 7| 7| 4| 5| 4| 6| 6| 7| 7| 6| 5| 6| 5| 4| 6| 6| 6| 6| 6|            |
                             DAY ON TEST   | 5| 8| 3| 3| 3| 3| 3| 3| 9| 1| 9| 7| 8| 3| 3| 4| 4| 9| 8| 5| 2| 1| 6| 9| 9|            |
                                           | 7| 3| 4| 4| 4| 0| 5| 5| 1| 7| 2| 6| 5| 6| 6| 5| 9| 1| 2| 5| 6| 8| 8| 5| 6|            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     O      |
   FISCHER 344 RATS MALE                   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     T      |
                               ANIMAL ID   | 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 5| 5| 5| 5| 5|     A      |
    10 PPM                                 | 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 8| 8| 8| 8| 8| 9| 9| 9| 9| 9| 0| 0| 0| 0| 0|     L      |
     3-3                                   | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|            |
 __________________________________________________________________________________________________________________________________ 
 ENDOCRINE SYSTEM - cont                   |                                                                          |            |
                                           |                                                                          |            |
      Leukemia Mononuclear                 |                         X     X              X     X                 X   |          7 |
      Pheochromocytoma Malignant           |                      X                                                   |          1 |
      Pheochromocytoma Benign              |                                                          X               |          2 |
                                            __________________________________________________________________________|____________|
   Islets, Pancreatic                      | +  +           +        +  +  +  +  +        +  +  +  +  +  +  +  +  +  +|  31        |
      Adenoma                              | X                                                                        |          1 |
                                            __________________________________________________________________________|____________|
   Parathyroid Gland                       | +  +           +        +  +  +  +  +        +  +  +  +  +  +  +  +  +  +|  31        |
                                            __________________________________________________________________________|____________|
   Pituitary Gland                         | +  +           +        +  +  +  +  +        +  +  +  +  I  +  +  +  +  +|  30        |
      Pars Distalis, Adenoma               |                                     X                 X           X      |          9 |
      Pars Distalis, Leukemia Mononuclear  |                         X                    X                           |          4 |
                                            __________________________________________________________________________|____________|
   Thyroid Gland                           | +  +           +        +  +  +  +  +        +  +  +  +  +  +  +  +  +  +|  31        |
      C-Cell, Adenoma                      | X                                            X                       X   |          3 |
      C-Cell, Carcinoma                    |                            X     X                                       |          3 |
      Follicular Cell, Adenoma             |                                                                          |          2 |
 _____________________________________________________________________________________________________________________|            |
 GENERAL BODY SYSTEM                       |                                                                          |            |
                                           |                                                                          |            |
    None                                   |                                                                          |            |
 _____________________________________________________________________________________________________________________|            |
 GENITAL SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Epididymis                              | +  +           +        +  +  +  +  +        +  +  +  +  +  +  +  +  +  +|  30        |
      Serosa, Mesothelioma Malignant       |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Preputial Gland                         | +  +  +     +  +     +  M  +  +  +  +        +  +  +  +  +  +  +  +  +  +|  34        |
      Adenoma                              |             X                                                            |          1 |
      Carcinoma                            |       X                                               X                  |          4 |
                                            __________________________________________________________________________|____________|
   Prostate                                | +  +           +        +  +  +  +  +        +  +  +  +  +  M  +  +  +  +|  30        |
      Leukemia Mononuclear                 |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Seminal Vesicle                         |                               +                                          |   1        |
                                            __________________________________________________________________________|____________|
   Testes                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Bilateral, Interstitial Cell, Adenoma| X     X  X  X  X  X  X              X  X  X  X     X  X           X  X  X|         37 |
      Interstitial Cell, Adenoma           |    X                          X                 X        X  X  X         |          9 |
      Tunic, Mesothelioma Malignant        |                                                                          |          1 |
 _____________________________________________________________________________________________________________________|            |
 HEMATOPOIETIC SYSTEM                      |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Bone Marrow                             | +  +           +        +  +  +  +  +        +  +  +  +  +  +  +  +  +  +|  31        |
      Femoral, Leukemia Mononuclear        |                                  X                                   X   |          6 |
                                            __________________________________________________________________________|____________|
   Lymph Node                              | +  +  +        +     +  +  +  +  +  +        +  +  +  +  +  +  +  +  +  +|  33        |
      Deep Cervical, Leukemia Mononuclear  |                         X                                                |          1 |
      Mandibular, Leukemia Mononuclear     | X  X                    X     X  X  X              X        X  X  X  X  X|         19 |
      Mediastinal, Fibrosarcoma,           |                                                                          |            |
          Metastatic, Skin                 |                                                          X               |          1 |
 __________________________________________________________________________________________________________________________________ 
                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  
                                                             Page  83                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 6| 5| 7| 7| 7| 7| 7| 7| 4| 5| 4| 6| 6| 7| 7| 6| 5| 6| 5| 4| 6| 6| 6| 6| 6|            |
                             DAY ON TEST   | 5| 8| 3| 3| 3| 3| 3| 3| 9| 1| 9| 7| 8| 3| 3| 4| 4| 9| 8| 5| 2| 1| 6| 9| 9|            |
                                           | 7| 3| 4| 4| 4| 0| 5| 5| 1| 7| 2| 6| 5| 6| 6| 5| 9| 1| 2| 5| 6| 8| 8| 5| 6|            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     O      |
   FISCHER 344 RATS MALE                   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     T      |
                               ANIMAL ID   | 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 5| 5| 5| 5| 5|     A      |
    10 PPM                                 | 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 8| 8| 8| 8| 8| 9| 9| 9| 9| 9| 0| 0| 0| 0| 0|     L      |
     3-3                                   | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|            |
 __________________________________________________________________________________________________________________________________ 
 HEMATOPOIETIC SYSTEM - cont               |                                                                          |            |
                                           |                                                                          |            |
      Mediastinal, Leukemia Mononuclear    |       X              X  X        X           X                 X     X   |         11 |
      Pancreatic, Leukemia Mononuclear     |                                  X                             X         |          3 |
      Renal, Leukemia Mononuclear          |                                  X                                       |          1 |
                                            __________________________________________________________________________|____________|
   Lymph Node, Mesenteric                  |                +        +                                      +         |   8        |
      Leukemia Mononuclear                 |                X        X                                      X         |          7 |
                                            __________________________________________________________________________|____________|
   Lymph Node, Thoracic                    |                                                                          |   1        |
                                            __________________________________________________________________________|____________|
   Spleen                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 | X  X  X  X  X  X  X  X  X  X  X  X  X     X  X     X  X     X  X  X  X  X|         41 |
                                            __________________________________________________________________________|____________|
   Thymus                                  | +  M           +     +  +  M  +  +  +        +  +  +  +  +  M  +  +  M  M|  24        |
      Leukemia Mononuclear                 |                      X  X     X                                X         |          7 |
 _____________________________________________________________________________________________________________________|            |
 INTEGUMENTARY SYSTEM                      |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Mammary Gland                           | +  +                    +  +                    +  +     +  +  +  +  +   |  20        |
                                            __________________________________________________________________________|____________|
   Skin                                    | +  +     +     +        +  +  +  +  +        +  +  +  +  +  +  +  +  +  +|  32        |
      Squamous Cell Papilloma              |          X                                                               |          1 |
      Trichoepithelioma                    |                                                                          |          1 |
      Subcutaneous Tissue, Fibroma         |                                                                          |          4 |
      Subcutaneous Tissue, Fibrosarcoma    |                                                          X               |          1 |
 _____________________________________________________________________________________________________________________|            |
 MUSCULOSKELETAL SYSTEM                    |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Bone                                    | +  +           +        +  +  +  +  +        +  +  +  +  +  +  +  +  +  +|  31        |
 _____________________________________________________________________________________________________________________|            |
 NERVOUS SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Brain                                   | +  +           +        +  +  +  +  +        +  +  +  +  +  +  +  +  +  +|  31        |
      Glioma Malignant                     |                                  X                                       |          1 |
 _____________________________________________________________________________________________________________________|            |
 RESPIRATORY SYSTEM                        |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Lung                                    | +  +     +     +        +  +  +  +  +        +  +  +  +  +  +  +  +  +  +|  32        |
      Alveolar/Bronchiolar Carcinoma       |                                                                      X   |          1 |
      Carcinoma Adenosquamous              |          X                                                               |          1 |
      Fibrosarcoma, Metastatic, Skin       |                                                          X               |          1 |
      Leukemia Mononuclear                 | X  X                    X     X  X  X        X     X        X  X     X   |         17 |
                                            __________________________________________________________________________|____________|
   Nose                                    | +  +           +        +  +  +  +  +        +  +  +  +  +  +  +  +  +  +|  31        |
                                            __________________________________________________________________________|____________|
   Trachea                                 | +  +           +        +  +  +  +  +        +  +  +  +  +  +  +  +  +  +|  31        |
      Peritracheal Tissue, Fibrosarcoma,   |                                                                          |            |
           Metastatic, Skin                |                                                          X               |          1 |
 _____________________________________________________________________________________________________________________|            |
 SPECIAL SENSES SYSTEM                     |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Eye                                     |                                                    +              +      |   4        |
 __________________________________________________________________________________________________________________________________ 
                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  
                                                             Page  84                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 6| 5| 7| 7| 7| 7| 7| 7| 4| 5| 4| 6| 6| 7| 7| 6| 5| 6| 5| 4| 6| 6| 6| 6| 6|            |
                             DAY ON TEST   | 5| 8| 3| 3| 3| 3| 3| 3| 9| 1| 9| 7| 8| 3| 3| 4| 4| 9| 8| 5| 2| 1| 6| 9| 9|            |
                                           | 7| 3| 4| 4| 4| 0| 5| 5| 1| 7| 2| 6| 5| 6| 6| 5| 9| 1| 2| 5| 6| 8| 8| 5| 6|            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     O      |
   FISCHER 344 RATS MALE                   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     T      |
                               ANIMAL ID   | 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 5| 5| 5| 5| 5|     A      |
    10 PPM                                 | 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 8| 8| 8| 8| 8| 9| 9| 9| 9| 9| 0| 0| 0| 0| 0|     L      |
     3-3                                   | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|            |
 __________________________________________________________________________________________________________________________________ 
 SPECIAL SENSES SYSTEM - cont              |                                                                          |            |
                                           |                                                                          |            |
 _____________________________________________________________________________________________________________________|            |
 URINARY SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Kidney                                  | +  +           +        +  +  +  +  +        +  +  +  +  +  +  +  +  +  +|  32        |
      Leukemia Mononuclear                 |                         X     X  X                             X         |          7 |
      Renal Tubule, Adenoma                |                                                                          |          2 |
                                            __________________________________________________________________________|____________|
   Urinary Bladder                         | +  +           +        +  +  +  +  +        +  +  +  +  +  +  +  +  +  +|  31        |
      Leukemia Mononuclear                 |                         X                                                |          2 |
 __________________________________________________________________________________________________________________________________ 
 SYSTEMIC LESIONS                          |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Multiple Organs                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 | X  X  X  X  X  X  X  X  X  X  X  X  X     X  X     X  X     X  X  X  X  X|         41 |
      Mesothelioma Malignant               |                                                                          |          1 |
 __________________________________________________________________________________________________________________________________ 
                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  
                                                             Page  85                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 7| 6| 7| 7| 7| 7| 6| 7| 7| 5| 7| 7| 5| 6| 7| 5| 6| 7| 7| 7| 6| 7| 7| 6| 7|             
                             DAY ON TEST   | 2| 7| 2| 2| 2| 2| 2| 0| 2| 4| 2| 3| 7| 4| 3| 8| 8| 3| 3| 3| 6| 0| 1| 5| 3|             
                                           | 7| 9| 7| 8| 8| 2| 6| 6| 9| 6| 9| 0| 7| 4| 0| 3| 9| 1| 1| 1| 7| 6| 0| 4| 4|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   FISCHER 344 RATS MALE                   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
                               ANIMAL ID   | 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5|             
    10 PPM                                 | 1| 1| 1| 1| 1| 2| 2| 2| 2| 2| 3| 3| 3| 3| 3| 4| 4| 4| 4| 4| 5| 5| 5| 5| 5|             
     10-3                                  | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|             
 _____________________________________________________________________________________________________________________|             
 ALIMENTARY SYSTEM                         |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Esophagus                               |    +           +  +  +     +        +  +     +  +           +  +  +  +   |             
                                            __________________________________________________________________________|             
   Intestine Large                         |    +           +  +  +     +        +  +     +  A           +  +  +  +   |             
                                            __________________________________________________________________________|             
   Intestine Large, Cecum                  |    +           +  +  +     +        +  +     +  A           +  +  +  +   |             
                                            __________________________________________________________________________|             
   Intestine Large, Colon                  |    +           +  +  +     +        +  +     +  A           +  +  +  +   |             
                                            __________________________________________________________________________|             
   Intestine Large, Rectum                 |    +           +  +  +     +        +  +     +  A           +  +  +  +   |             
                                            __________________________________________________________________________|             
   Intestine Small                         |    +           +  +  +     +        +  +     +  +           +  +  +  +   |             
                                            __________________________________________________________________________|             
   Intestine Small, Duodenum               |    +           +  +  +     +        +  +     +  +           +  +  +  +   |             
                                            __________________________________________________________________________|             
   Intestine Small, Ileum                  |    +           +  +  +     +        +  +     +  A           +  +  +  +   |             
                                            __________________________________________________________________________|             
   Intestine Small, Jejunum                |    +           +  +  +     +        +  +     +  A           +  +  +  +   |             
                                            __________________________________________________________________________|             
   Liver                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Hepatocellular Carcinoma             |                                                                          |             
      Hepatocellular Adenoma               | X  X  X  X           X                                X                  |             
      Hepatocellular Adenoma, Multiple     |             X                          X     X                           |             
      Leukemia Mononuclear                 |    X  X  X     X  X  X  X  X  X  X     X  X  X  X  X  X  X  X        X  X|             
                                            __________________________________________________________________________|             
   Mesentery                               | +                                                                        |             
      Lipoma                               | X                                                                        |             
      Mesothelioma Malignant               |                                                                          |             
                                            __________________________________________________________________________|             
   Pancreas                                |    +     +     +  +  +     +        +  +     +  +           +  +  +  +   |             
      Leukemia Mononuclear                 |                                                                          |             
      Acinus, Adenoma                      |          X                                                               |             
                                            __________________________________________________________________________|             
   Salivary Glands                         |    +           +  +  +     +        +  +     +  M           +  +  +  +   |             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Stomach                                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Stomach, Forestomach                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Stomach, Glandular                      | +  +  +  +  +  +  +  +  +  +     +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             
 CARDIOVASCULAR SYSTEM                     |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Heart                                   |    +           +  +  +     +        +  +     +  +           +  +  +  +   |             
      Leukemia Mononuclear                 |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 ENDOCRINE SYSTEM                          |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Adrenal Gland                           |    +           +  +  +     +        +  +     +  +           +  +  +  +   |             
                                            __________________________________________________________________________|             
   Adrenal Gland, Cortex                   |    +           +  +  +     +        +  +     +  +           +  +  +  +   |             
      Leukemia Mononuclear                 |    X           X           X                                             |             
                                            __________________________________________________________________________|             
   Adrenal Gland, Medulla                  |    +           +  +  +     +        +  +     +  +           +  +  +  +   |             
      Leukemia Mononuclear                 |    X           X           X                                             |             
      Pheochromocytoma Malignant           |                                                 X                        |             
      Pheochromocytoma Benign              |                                        X                                 |             
                                            __________________________________________________________________________|             
   Islets, Pancreatic                      |    +           +  +  +     +        +  +     +  +           +  +  +  +   |             
                                            __________________________________________________________________________|             
   Parathyroid Gland                       |    M           +  +  +     +        +  +     M  +           +  +  +  +   |             
      Adenoma                              |                   X                                                      |             
                                            __________________________________________________________________________|             
   Pituitary Gland                         |    +           +  +  +     +  +     +  +     +  +     +     +  +  +  +   |             
      Pars Distalis, Adenoma               |                      X     X  X              X              X        X   |             
      Pars Distalis, Leukemia Mononuclear  |    X                                                                     |             
 _____________________________________________________________________________________________________________________|             
                                                             Page  86                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 7| 6| 7| 7| 7| 7| 6| 7| 7| 5| 7| 7| 5| 6| 7| 5| 6| 7| 7| 7| 6| 7| 7| 6| 7|             
                             DAY ON TEST   | 2| 7| 2| 2| 2| 2| 2| 0| 2| 4| 2| 3| 7| 4| 3| 8| 8| 3| 3| 3| 6| 0| 1| 5| 3|             
                                           | 7| 9| 7| 8| 8| 2| 6| 6| 9| 6| 9| 0| 7| 4| 0| 3| 9| 1| 1| 1| 7| 6| 0| 4| 4|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   FISCHER 344 RATS MALE                   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
                               ANIMAL ID   | 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5|             
    10 PPM                                 | 1| 1| 1| 1| 1| 2| 2| 2| 2| 2| 3| 3| 3| 3| 3| 4| 4| 4| 4| 4| 5| 5| 5| 5| 5|             
     10-3                                  | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|             
 _____________________________________________________________________________________________________________________|             
 ENDOCRINE SYSTEM - cont                   |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Thyroid Gland                           |    +           +  +  +     +        +  +     +  +           +  +  +  +   |             
      Bilateral, Follicular Cell, Adenoma  |                                                                          |             
      C-Cell, Adenoma                      |                                                             X     X      |             
 _____________________________________________________________________________________________________________________|             
 GENERAL BODY SYSTEM                       |                                                                          |             
                                           |                                                                          |             
    None                                   |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 GENITAL SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Epididymis                              |    +           +  +  +     +        +  +     +  +           +  +  +  +   |             
      Serosa, Mesothelioma Benign          |                                                                          |             
      Serosa, Mesothelioma Malignant       |                                                                          |             
                                            __________________________________________________________________________|             
   Preputial Gland                         |    +           +  +  +     +  +     +  +     +  +           +  +  +  +   |             
      Carcinoma                            |                   X                                                  X   |             
                                            __________________________________________________________________________|             
   Prostate                                |    +           +  +  +     +        +  +     +  +           +  +  +  +   |             
                                            __________________________________________________________________________|             
   Seminal Vesicle                         |                                                                          |             
                                            __________________________________________________________________________|             
   Testes                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Bilateral, Interstitial Cell, Adenoma|    X  X  X  X  X  X  X  X  X  X  X  X  X  X     X  X  X  X  X  X     X  X|             
      Interstitial Cell, Adenoma           | X                                            X                           |             
      Tunic, Mesothelioma Malignant        |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 HEMATOPOIETIC SYSTEM                      |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Bone Marrow                             |    +           +  +  +     +        +  +     +  +           +  +  +  +   |             
      Femoral, Leukemia Mononuclear        |                   X                    X     X                           |             
                                            __________________________________________________________________________|             
   Lymph Node                              | +  +           +  +  +     +     +  +  +     +  M           +  +  +  +   |             
      Mandibular, Leukemia Mononuclear     |    X           X  X  X     X           X     X                           |             
      Mandibular, Lymphoma Malignant       |                                                                          |             
          Lymphocytic                      |                                                                   X      |             
      Mediastinal, Leukemia Mononuclear    |    X           X                       X     X                           |             
      Mediastinal, Lymphoma Malignant      |                                                                          |             
          Lymphocytic                      |                                                                   X      |             
      Pancreatic, Leukemia Mononuclear     |    X                                                                     |             
      Pancreatic, Lymphoma Malignant       |                                                                          |             
          Lymphocytic                      |                                                                   X      |             
      Renal, Leukemia Mononuclear          |                                                                          |             
                                            __________________________________________________________________________|             
   Lymph Node, Mesenteric                  |                +                 +  +                          +         |             
      Leukemia Mononuclear                 |                X                 X                                       |             
                                            __________________________________________________________________________|             
   Lymph Node, Thoracic                    |                                     +                          +         |             
                                            __________________________________________________________________________|             
   Spleen                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |    X  X  X     X  X  X  X  X  X  X     X  X  X  X  X  X  X  X        X  X|             
      Lymphoma Malignant Lymphocytic       |                                                                   X      |             
                                            __________________________________________________________________________|             
   Thymus                                  |    +           +  +  +     M        +  +     +  +           +  +  +  +   |             
      Leukemia Mononuclear                 |    X           X                                            X            |             
 _____________________________________________________________________________________________________________________|             
 INTEGUMENTARY SYSTEM                      |                                                                          |             
                                           |                                                                          |             
 _____________________________________________________________________________________________________________________|             
                                                             Page  87                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 7| 6| 7| 7| 7| 7| 6| 7| 7| 5| 7| 7| 5| 6| 7| 5| 6| 7| 7| 7| 6| 7| 7| 6| 7|             
                             DAY ON TEST   | 2| 7| 2| 2| 2| 2| 2| 0| 2| 4| 2| 3| 7| 4| 3| 8| 8| 3| 3| 3| 6| 0| 1| 5| 3|             
                                           | 7| 9| 7| 8| 8| 2| 6| 6| 9| 6| 9| 0| 7| 4| 0| 3| 9| 1| 1| 1| 7| 6| 0| 4| 4|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   FISCHER 344 RATS MALE                   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
                               ANIMAL ID   | 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5|             
    10 PPM                                 | 1| 1| 1| 1| 1| 2| 2| 2| 2| 2| 3| 3| 3| 3| 3| 4| 4| 4| 4| 4| 5| 5| 5| 5| 5|             
     10-3                                  | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|             
 _____________________________________________________________________________________________________________________|             
 INTEGUMENTARY SYSTEM - cont               |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Mammary Gland                           |    +           +     +     +        +  +     +                       +   |             
                                            __________________________________________________________________________|             
   Skin                                    |    +           +  +  +     +        +  +  +  +  +           +  +  +  +   |             
      Basosquamous Tumor Benign            |                                           X                              |             
      Subcutaneous Tissue, Fibroma         |                                                                X         |             
      Subcutaneous Tissue, Fibrosarcoma    |                                              X                           |             
 _____________________________________________________________________________________________________________________|             
 MUSCULOSKELETAL SYSTEM                    |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Bone                                    |    +           +  +  +     +        +  +     +  +           +  +  +  +   |             
      Femur, Hemangiosarcoma               |                                                                          |             
      Lumbar, Osteosarcoma                 |                                     X                                    |             
 _____________________________________________________________________________________________________________________|             
 NERVOUS SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Brain                                   |    +           +  +  +     +        +  +     +  +           +  +  +  +   |             
 _____________________________________________________________________________________________________________________|             
 RESPIRATORY SYSTEM                        |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Lung                                    |    +           +  +  +     +        +  +     +  +           +  +  +  +   |             
      Alveolar/Bronchiolar Adenoma         |                                                                          |             
      Carcinoma Adenosquamous              |                                                                          |             
      Leukemia Mononuclear                 |    X           X  X                    X     X  X                        |             
                                            __________________________________________________________________________|             
   Nose                                    |    +           +  +  +     +        +  +     +  +           +  +  +  +   |             
                                            __________________________________________________________________________|             
   Trachea                                 |    +           +  +  +     +        +  +     +  +           +  +  +  +   |             
 _____________________________________________________________________________________________________________________|             
 SPECIAL SENSES SYSTEM                     |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Eye                                     |    +                                                                     |             
 _____________________________________________________________________________________________________________________|             
 URINARY SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Kidney                                  |    +           +  +  +     +  +  +  +  +  +  +  +           +  +  +  +   |             
      Leukemia Mononuclear                 |    X                                                                     |             
                                            __________________________________________________________________________|             
   Urinary Bladder                         |    +           +  +  +     +        +  +     +  +           +  +  +  +   |             
 _____________________________________________________________________________________________________________________|             
 SYSTEMIC LESIONS                          |                                                                          |             
                                            __________________________________________________________________________|             
   Multiple Organs                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |    X  X  X     X  X  X  X  X  X  X     X  X  X  X  X  X  X  X        X  X|             
      Lymphoma Malignant Lymphocytic       |                                                                   X      |             
      Mesothelioma Benign                  |                                                                          |             
      Mesothelioma Malignant               |                                                                          |             
 _____________________________________________________________________________________________________________________|             
                                                             Page  88                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 7| 7| 6| 7| 7| 3| 7| 5| 6| 5| 6| 6| 7| 6| 6| 6| 7| 5| 5| 6| 6| 7| 6| 5| 6|            |
                             DAY ON TEST   | 3| 3| 6| 3| 3| 9| 3| 4| 9| 3| 3| 9| 3| 2| 6| 9| 3| 9| 2| 1| 5| 3| 3| 3| 7|            |
                                           | 4| 4| 1| 5| 5| 7| 5| 7| 4| 1| 9| 9| 6| 3| 6| 1| 1| 4| 2| 9| 7| 6| 0| 1| 4|            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     O      |
   FISCHER 344 RATS MALE                   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     T      |
                               ANIMAL ID   | 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 6| 6| 6| 6| 6|     A      |
    10 PPM                                 | 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 8| 8| 8| 8| 8| 9| 9| 9| 9| 9| 0| 0| 0| 0| 0|     L      |
     10-3                                  | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|            |
 __________________________________________________________________________________________________________________________________ 
 ALIMENTARY SYSTEM                         |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Esophagus                               |       +        +     +  +  +  +  +     +  +  +  +  +  +  +  +     +  +  +|  31        |
                                            __________________________________________________________________________|____________|
   Intestine Large                         |       +        +     +  +  +  +  +     +  +  +  +  +  +  +  +     +  +  +|  30        |
                                            __________________________________________________________________________|____________|
   Intestine Large, Cecum                  |       +        A     +  +  +  +  +     +  +  +  +  +  +  +  +     +  +  +|  29        |
                                            __________________________________________________________________________|____________|
   Intestine Large, Colon                  |       +        +     +  +  +  +  +     +  +  +  +  +  +  +  +     +  +  +|  30        |
                                            __________________________________________________________________________|____________|
   Intestine Large, Rectum                 |       +        +     +  +  +  +  +     +  +  +  +  +  +  +  +     +  +  +|  30        |
                                            __________________________________________________________________________|____________|
   Intestine Small                         |       +        +     +  +  +  +  +     +  +  +  +  +  +  +  +     +  +  +|  31        |
                                            __________________________________________________________________________|____________|
   Intestine Small, Duodenum               |       +        A     +  +  +  +  +     +  +  +  +  +  +  +  +     +  +  +|  30        |
                                            __________________________________________________________________________|____________|
   Intestine Small, Ileum                  |       +        A     +  +  +  +  +     +  +  +  +  +  +  +  +     +  +  +|  29        |
                                            __________________________________________________________________________|____________|
   Intestine Small, Jejunum                |       +        +     +  +  +  +  +     +  +  +  +  +  +  +  +     +  +  +|  30        |
                                            __________________________________________________________________________|____________|
   Liver                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Hepatocellular Carcinoma             |                   X                                                      |          1 |
      Hepatocellular Adenoma               |                               X  X     X        X                        |         10 |
      Hepatocellular Adenoma, Multiple     |                   X                                               X  X   |          6 |
      Leukemia Mononuclear                 |       X        X  X     X  X  X        X  X  X  X  X  X  X  X     X  X  X|         37 |
                                            __________________________________________________________________________|____________|
   Mesentery                               |                                  +                                       |   2        |
      Lipoma                               |                                                                          |          1 |
      Mesothelioma Malignant               |                                  X                                       |          1 |
                                            __________________________________________________________________________|____________|
   Pancreas                                |       +        A     +  +  +  +  +     +  +  +  +  +  +  +  +     +  +  +|  31        |
      Leukemia Mononuclear                 |                                                             X     X      |          2 |
      Acinus, Adenoma                      |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Salivary Glands                         |       +        +     +  +  +  +  +     +  +  +  +  +  +  +  +     +  +  +|  30        |
      Leukemia Mononuclear                 |                                                             X            |          1 |
                                            __________________________________________________________________________|____________|
   Stomach                                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Stomach, Forestomach                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Stomach, Glandular                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
 _____________________________________________________________________________________________________________________|            |
 CARDIOVASCULAR SYSTEM                     |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Heart                                   |       +        +     +  +  +  +  +     +  +  +  +  +  +  +  +     +  +  +|  31        |
      Leukemia Mononuclear                 |                                                             X     X  X   |          3 |
 _____________________________________________________________________________________________________________________|            |
 ENDOCRINE SYSTEM                          |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Adrenal Gland                           |       +        M     +  +  +  +  +     +  +  +  +  +  +  +  +     +  +  +|  30        |
                                            __________________________________________________________________________|____________|
   Adrenal Gland, Cortex                   |       +        M     +  +  +  +  +     +  +  +  +  +  +  +  +     +  +  +|  30        |
      Leukemia Mononuclear                 |                            X           X              X     X     X  X   |          9 |
                                            __________________________________________________________________________|____________|
   Adrenal Gland, Medulla                  |       +        M     +  +  +  +  +     +  +  +  +  +  +  +  +     +  +  +|  30        |
      Leukemia Mononuclear                 |                            X           X              X     X     X  X   |          9 |
      Pheochromocytoma Malignant           |                                                                          |          1 |
      Pheochromocytoma Benign              |                                        X     X                           |          3 |
                                            __________________________________________________________________________|____________|
   Islets, Pancreatic                      |       +        A     +  +  +  +  +     +  +  +  +  +  +  +  +     +  +  +|  30        |
 __________________________________________________________________________________________________________________________________ 
                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  
                                                             Page  89                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 7| 7| 6| 7| 7| 3| 7| 5| 6| 5| 6| 6| 7| 6| 6| 6| 7| 5| 5| 6| 6| 7| 6| 5| 6|            |
                             DAY ON TEST   | 3| 3| 6| 3| 3| 9| 3| 4| 9| 3| 3| 9| 3| 2| 6| 9| 3| 9| 2| 1| 5| 3| 3| 3| 7|            |
                                           | 4| 4| 1| 5| 5| 7| 5| 7| 4| 1| 9| 9| 6| 3| 6| 1| 1| 4| 2| 9| 7| 6| 0| 1| 4|            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     O      |
   FISCHER 344 RATS MALE                   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     T      |
                               ANIMAL ID   | 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 6| 6| 6| 6| 6|     A      |
    10 PPM                                 | 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 8| 8| 8| 8| 8| 9| 9| 9| 9| 9| 0| 0| 0| 0| 0|     L      |
     10-3                                  | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|            |
 __________________________________________________________________________________________________________________________________ 
 ENDOCRINE SYSTEM - cont                   |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Parathyroid Gland                       |       +        +     +  +  +  +  +     +  +  +  +  +  +  +  +     +  +  +|  29        |
      Adenoma                              |                                                 X                        |          2 |
                                            __________________________________________________________________________|____________|
   Pituitary Gland                         |       +        +     +  +  +  +  +  +  +  +  +  +  +  +  +  +     +  +  +|  34        |
      Pars Distalis, Adenoma               |                      X  X        X  X        X                           |         11 |
      Pars Distalis, Leukemia Mononuclear  |                                                                   X      |          2 |
                                            __________________________________________________________________________|____________|
   Thyroid Gland                           |       +        A     +  +  +  +  +     +  +  +  +  +  +  +  +     +  +  +|  30        |
      Bilateral, Follicular Cell, Adenoma  |                                                 X                        |          1 |
      C-Cell, Adenoma                      |                            X  X        X     X  X                 X      |          8 |
 _____________________________________________________________________________________________________________________|            |
 GENERAL BODY SYSTEM                       |                                                                          |            |
                                           |                                                                          |            |
    None                                   |                                                                          |            |
 _____________________________________________________________________________________________________________________|            |
 GENITAL SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Epididymis                              |       +        +        +  +  +  +     +  +  +  +  +  +  +  +     +  +  +|  30        |
      Serosa, Mesothelioma Benign          |                               X                                          |          1 |
      Serosa, Mesothelioma Malignant       |                                  X                                       |          1 |
                                            __________________________________________________________________________|____________|
   Preputial Gland                         |       +        +     +  +  +  +  +     +  +  +  +  +  +  +  +     +  +  +|  32        |
      Carcinoma                            |                                                                          |          2 |
                                            __________________________________________________________________________|____________|
   Prostate                                |       +        +     +  +  +  +  +     +  +  +  +  +  +  +  +     +  +  +|  31        |
                                            __________________________________________________________________________|____________|
   Seminal Vesicle                         |                +                                                         |   1        |
                                            __________________________________________________________________________|____________|
   Testes                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Bilateral, Interstitial Cell, Adenoma| X  X  X  X  X     X     X  X  X  X  X  X  X     X  X     X  X  X     X  X|         42 |
      Interstitial Cell, Adenoma           |                      X                       X                    X      |          5 |
      Tunic, Mesothelioma Malignant        |                               X  X                 X                     |          3 |
 _____________________________________________________________________________________________________________________|            |
 HEMATOPOIETIC SYSTEM                      |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Bone Marrow                             |       +        A     +  +  +  +  +     +  +  +  +  +  +  +  +     +  +  +|  30        |
      Femoral, Leukemia Mononuclear        |                            X              X        X              X  X   |          8 |
                                            __________________________________________________________________________|____________|
   Lymph Node                              |       +        M     +  +  +  +  +     +  +  +  +  +  +  +  +     +  +  +|  31        |
      Mandibular, Leukemia Mononuclear     |                         X  X  X        X  X  X  X  X  X  X  X     X  X  X|         21 |
      Mandibular, Lymphoma Malignant       |                                                                          |            |
          Lymphocytic                      |                                                                          |          1 |
      Mediastinal, Leukemia Mononuclear    |                               X           X  X  X  X     X           X   |         11 |
      Mediastinal, Lymphoma Malignant      |                                                                          |            |
          Lymphocytic                      |                                                                          |          1 |
      Pancreatic, Leukemia Mononuclear     |                                                                          |          1 |
      Pancreatic, Lymphoma Malignant       |                                                                          |            |
          Lymphocytic                      |                                                                          |          1 |
      Renal, Leukemia Mononuclear          |                                           X                              |          1 |
 __________________________________________________________________________________________________________________________________ 
                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  
                                                             Page  90                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 7| 7| 6| 7| 7| 3| 7| 5| 6| 5| 6| 6| 7| 6| 6| 6| 7| 5| 5| 6| 6| 7| 6| 5| 6|            |
                             DAY ON TEST   | 3| 3| 6| 3| 3| 9| 3| 4| 9| 3| 3| 9| 3| 2| 6| 9| 3| 9| 2| 1| 5| 3| 3| 3| 7|            |
                                           | 4| 4| 1| 5| 5| 7| 5| 7| 4| 1| 9| 9| 6| 3| 6| 1| 1| 4| 2| 9| 7| 6| 0| 1| 4|            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     O      |
   FISCHER 344 RATS MALE                   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     T      |
                               ANIMAL ID   | 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 6| 6| 6| 6| 6|     A      |
    10 PPM                                 | 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 8| 8| 8| 8| 8| 9| 9| 9| 9| 9| 0| 0| 0| 0| 0|     L      |
     10-3                                  | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|            |
 __________________________________________________________________________________________________________________________________ 
 HEMATOPOIETIC SYSTEM - cont               |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Lymph Node, Mesenteric                  |                                                                          |   4        |
      Leukemia Mononuclear                 |                                                                          |          2 |
                                            __________________________________________________________________________|____________|
   Lymph Node, Thoracic                    |                                                                          |   2        |
                                            __________________________________________________________________________|____________|
   Spleen                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 |       X        X  X     X  X  X        X  X  X  X  X  X  X  X     X  X  X|         37 |
      Lymphoma Malignant Lymphocytic       |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Thymus                                  |       +        +     +  M  +  +  M     +  M  +  +  +  +  +  +     +  +  +|  27        |
      Leukemia Mononuclear                 |                X              X        X              X     X     X  X   |         10 |
 _____________________________________________________________________________________________________________________|            |
 INTEGUMENTARY SYSTEM                      |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Mammary Gland                           |                +     +     +  +  +     +           +     +  M     +  +  M|  18        |
                                            __________________________________________________________________________|____________|
   Skin                                    |       +        +     +  +  +  +  +     +  +  +  +  +  +  +  +     +  +  +|  32        |
      Basosquamous Tumor Benign            |                                                                          |          1 |
      Subcutaneous Tissue, Fibroma         |                                                                   X      |          2 |
      Subcutaneous Tissue, Fibrosarcoma    |                                                                          |          1 |
 _____________________________________________________________________________________________________________________|            |
 MUSCULOSKELETAL SYSTEM                    |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Bone                                    |       +        +     +  +  +  +  +     +  +  +  +  +  +  +  +     +  +  +|  31        |
      Femur, Hemangiosarcoma               |                               X                                          |          1 |
      Lumbar, Osteosarcoma                 |                                                                          |          1 |
 _____________________________________________________________________________________________________________________|            |
 NERVOUS SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Brain                                   |       +        +     +  +  +  +  +     +  +  +  +  +  +  +  +     +  +  +|  31        |
 _____________________________________________________________________________________________________________________|            |
 RESPIRATORY SYSTEM                        |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Lung                                    |       +        +     +  +  +  +  +     +  +  +     +  +  +  +  +  +  +  +|  31        |
      Alveolar/Bronchiolar Adenoma         |                                                                   X      |          1 |
      Carcinoma Adenosquamous              |                                                                X         |          1 |
      Leukemia Mononuclear                 |                X           X  X        X  X  X     X  X  X  X     X  X  X|         19 |
                                            __________________________________________________________________________|____________|
   Nose                                    |       +        A     +  +  +  +  +     +  +  +  +  +  +  +  +     +  +  +|  30        |
                                            __________________________________________________________________________|____________|
   Trachea                                 |       +        +     +  +  +  +  +     +  +  +  +  +  +  +  +     +  +  +|  31        |
 _____________________________________________________________________________________________________________________|            |
 SPECIAL SENSES SYSTEM                     |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Eye                                     |                   +     +                                                |   3        |
 _____________________________________________________________________________________________________________________|            |
 URINARY SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Kidney                                  |       +     +  +     +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  37        |
      Leukemia Mononuclear                 |                X                                            X     X  X   |          5 |
                                            __________________________________________________________________________|____________|
   Urinary Bladder                         |       +        A     +  +  +  +  +     +  +  +  +  +  +  +  +     +  +  +|  30        |
 __________________________________________________________________________________________________________________________________ 
 SYSTEMIC LESIONS                          |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Multiple Organs                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
 __________________________________________________________________________________________________________________________________ 
                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  
                                                             Page  91                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 7| 7| 6| 7| 7| 3| 7| 5| 6| 5| 6| 6| 7| 6| 6| 6| 7| 5| 5| 6| 6| 7| 6| 5| 6|            |
                             DAY ON TEST   | 3| 3| 6| 3| 3| 9| 3| 4| 9| 3| 3| 9| 3| 2| 6| 9| 3| 9| 2| 1| 5| 3| 3| 3| 7|            |
                                           | 4| 4| 1| 5| 5| 7| 5| 7| 4| 1| 9| 9| 6| 3| 6| 1| 1| 4| 2| 9| 7| 6| 0| 1| 4|            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     O      |
   FISCHER 344 RATS MALE                   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     T      |
                               ANIMAL ID   | 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 6| 6| 6| 6| 6|     A      |
    10 PPM                                 | 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 8| 8| 8| 8| 8| 9| 9| 9| 9| 9| 0| 0| 0| 0| 0|     L      |
     10-3                                  | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|            |
 __________________________________________________________________________________________________________________________________ 
 SYSTEMIC LESIONS - cont                   |                                                                          |            |
                                           |                                                                          |            |
      Leukemia Mononuclear                 |       X        X  X     X  X  X        X  X  X  X  X  X  X  X     X  X  X|         37 |
      Lymphoma Malignant Lymphocytic       |                                                                          |          1 |
      Mesothelioma Benign                  |                               X                                          |          1 |
      Mesothelioma Malignant               |                               X  X                 X                     |          3 |
 __________________________________________________________________________________________________________________________________ 
                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  
                                                             Page  92                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 6| 6| 7| 6| 6| 7| 6| 7| 7| 6| 7| 6| 6| 7| 7| 7| 7| 7| 7| 7| 7| 7| 6| 7| 7|             
                             DAY ON TEST   | 5| 5| 2| 4| 3| 2| 0| 2| 2| 9| 2| 8| 4| 2| 2| 2| 2| 3| 2| 3| 3| 3| 2| 0| 3|             
                                           | 9| 6| 7| 3| 1| 7| 4| 7| 8| 3| 8| 2| 3| 9| 9| 9| 9| 0| 5| 0| 1| 1| 3| 1| 1|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   FISCHER 344 RATS MALE                   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
                               ANIMAL ID   | 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6|             
    30 PPM                                 | 1| 1| 1| 1| 1| 2| 2| 2| 2| 2| 3| 3| 3| 3| 3| 4| 4| 4| 4| 4| 5| 5| 5| 5| 5|             
     0-10                                  | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|             
 _____________________________________________________________________________________________________________________|             
 ALIMENTARY SYSTEM                         |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Esophagus                               | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Large                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Large, Cecum                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +     +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Large, Colon                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +     +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Large, Rectum                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +     +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Small                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Small, Duodenum               | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +     +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Small, Ileum                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +     +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Small, Jejunum                | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +     +  +  +  +  +  +  +  +|             
      Leiomyosarcoma                       |       X                                                                  |             
      Leiomyosarcoma, Metastatic, Mesentery| X                                                                        |             
                                            __________________________________________________________________________|             
   Liver                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Hepatocellular Carcinoma             |                X              X  X        X        X  X  X  X           X|             
      Hepatocellular Carcinoma, Multiple   |    X        X     X                    X                                 |             
      Hepatocellular Adenoma               |                                                                X         |             
      Hepatocellular Adenoma, Multiple     | X     X  X  X  X  X  X           X     X  X  X  X  X  X  X  X        X   |             
      Leukemia Mononuclear                 |    X     X  X  X  X                 X        X     X     X     X  X      |             
      Squamous Cell Carcinoma, Metastatic, |                                                                          |             
           Stomach                         |                            X                                             |             
                                            __________________________________________________________________________|             
   Mesentery                               | +                 +        +                          +           +      |             
      Fibrosarcoma                         | X                                                                        |             
      Leukemia Mononuclear                 |                                                                   X      |             
      Mesothelioma Malignant               |                   X                                                      |             
      Squamous Cell Carcinoma, Metastatic, |                                                                          |             
           Stomach                         |                            X                                             |             
                                            __________________________________________________________________________|             
   Pancreas                                | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Squamous Cell Carcinoma, Metastatic, |                                                                          |             
           Stomach                         |                            X                                             |             
                                            __________________________________________________________________________|             
   Salivary Glands                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Stomach                                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Stomach, Forestomach                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Squamous Cell Carcinoma              |                            X                                             |             
                                            __________________________________________________________________________|             
   Stomach, Glandular                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Tooth                                   |             +                                                            |             
 _____________________________________________________________________________________________________________________|             
 CARDIOVASCULAR SYSTEM                     |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Heart                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |    X                                                              X      |             
 _____________________________________________________________________________________________________________________|             
 ENDOCRINE SYSTEM                          |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Adrenal Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Adrenal Gland, Cortex                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |    X                                                                     |             
                                            __________________________________________________________________________|             
   Adrenal Gland, Medulla                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             
                                                             Page  93                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 6| 6| 7| 6| 6| 7| 6| 7| 7| 6| 7| 6| 6| 7| 7| 7| 7| 7| 7| 7| 7| 7| 6| 7| 7|             
                             DAY ON TEST   | 5| 5| 2| 4| 3| 2| 0| 2| 2| 9| 2| 8| 4| 2| 2| 2| 2| 3| 2| 3| 3| 3| 2| 0| 3|             
                                           | 9| 6| 7| 3| 1| 7| 4| 7| 8| 3| 8| 2| 3| 9| 9| 9| 9| 0| 5| 0| 1| 1| 3| 1| 1|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   FISCHER 344 RATS MALE                   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
                               ANIMAL ID   | 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6|             
    30 PPM                                 | 1| 1| 1| 1| 1| 2| 2| 2| 2| 2| 3| 3| 3| 3| 3| 4| 4| 4| 4| 4| 5| 5| 5| 5| 5|             
     0-10                                  | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|             
 _____________________________________________________________________________________________________________________|             
 ENDOCRINE SYSTEM - cont                   |                                                                          |             
                                           |                                                                          |             
      Leukemia Mononuclear                 |    X                                                                     |             
      Pheochromocytoma Benign              |                         X                                                |             
                                            __________________________________________________________________________|             
   Islets, Pancreatic                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |       X                       X                                          |             
                                            __________________________________________________________________________|             
   Parathyroid Gland                       | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Pituitary Gland                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Pars Distalis, Adenoma               |                                                    X                     |             
                                            __________________________________________________________________________|             
   Thyroid Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      C-Cell, Adenoma                      |                            X                                             |             
      C-Cell, Adenoma, Multiple            |                                                                          |             
      C-Cell, Carcinoma                    |                                                          X               |             
 _____________________________________________________________________________________________________________________|             
 GENERAL BODY SYSTEM                       |                                                                          |             
                                           |                                                                          |             
    None                                   |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 GENITAL SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Epididymis                              | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Serosa, Mesothelioma Malignant       |                   X                                                      |             
                                            __________________________________________________________________________|             
   Preputial Gland                         | +  +  M  +  +  +  M  +  +  M  +  +  +  +  +  +  +  +  +  +  +  +  +  M  +|             
      Adenoma                              |             X                                                            |             
                                            __________________________________________________________________________|             
   Prostate                                | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Testes                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Bilateral, Interstitial Cell, Adenoma| X        X  X  X     X  X  X  X     X  X  X  X  X  X  X  X  X  X     X  X|             
      Interstitial Cell, Adenoma           |    X  X           X              X                                X      |             
      Tunic, Mesothelioma Malignant        |                   X                                                      |             
 _____________________________________________________________________________________________________________________|             
 HEMATOPOIETIC SYSTEM                      |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Bone Marrow                             | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Femoral, Leukemia Mononuclear        |    X     X  X     X                 X                 X                  |             
                                            __________________________________________________________________________|             
   Lymph Node                              | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +   |             
      Deep Cervical, Carcinoma, Metastatic,|                                                                          |             
           Thyroid Gland                   |                                                          X               |             
      Inguinal, Leukemia Mononuclear       |                                                                   X      |             
      Mandibular, Leukemia Mononuclear     |    X     X  X  X                    X        X        X  X  X  X  X      |             
      Mediastinal, Leukemia Mononuclear    |             X                                                     X      |             
      Pancreatic, Leukemia Mononuclear     |    X        X                                                            |             
      Renal, Leukemia Mononuclear          |    X                                                                     |             
                                            __________________________________________________________________________|             
   Lymph Node, Mesenteric                  |             +                                         +           +      |             
      Leukemia Mononuclear                 |             X                                         X           X      |             
                                            __________________________________________________________________________|             
   Spleen                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |    X     X  X  X  X                 X        X     X  X  X     X  X      |             
                                            __________________________________________________________________________|             
   Thymus                                  | +  +  +  +  +  M  +  M  +  +  +  +  +  M  M  +  +  +  +  M  +  +  M  +  +|             
      Leukemia Mononuclear                 |             X                                         X                  |             
 _____________________________________________________________________________________________________________________|             
 INTEGUMENTARY SYSTEM                      |                                                                          |             
 _____________________________________________________________________________________________________________________|             
                                                             Page  94                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 6| 6| 7| 6| 6| 7| 6| 7| 7| 6| 7| 6| 6| 7| 7| 7| 7| 7| 7| 7| 7| 7| 6| 7| 7|             
                             DAY ON TEST   | 5| 5| 2| 4| 3| 2| 0| 2| 2| 9| 2| 8| 4| 2| 2| 2| 2| 3| 2| 3| 3| 3| 2| 0| 3|             
                                           | 9| 6| 7| 3| 1| 7| 4| 7| 8| 3| 8| 2| 3| 9| 9| 9| 9| 0| 5| 0| 1| 1| 3| 1| 1|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   FISCHER 344 RATS MALE                   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
                               ANIMAL ID   | 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6|             
    30 PPM                                 | 1| 1| 1| 1| 1| 2| 2| 2| 2| 2| 3| 3| 3| 3| 3| 4| 4| 4| 4| 4| 5| 5| 5| 5| 5|             
     0-10                                  | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|             
 _____________________________________________________________________________________________________________________|             
 INTEGUMENTARY SYSTEM - cont               |                                                                          |             
                                           |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Mammary Gland                           |    +  +  +  +  +  +  +     +  +  +  +  +  +  +  +  +  +     +     +  +  +|             
                                            __________________________________________________________________________|             
   Skin                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Squamous Cell Carcinoma              |                                              X                           |             
      Squamous Cell Papilloma              |                                                                          |             
      Subcutaneous Tissue, Fibroma         |                                                                         X|             
      Subcutaneous Tissue, Fibroma,        |                                                                          |             
          Multiple                         |                                                                          |             
      Subcutaneous Tissue, Fibrosarcoma    |                                                             X            |             
      Subcutaneous Tissue, Hemangioma      |       X                                                                  |             
      Subcutaneous Tissue, Lipoma          |                                                                          |             
      Subcutaneous Tissue, Neurofibroma    |                                                       X                  |             
 _____________________________________________________________________________________________________________________|             
 MUSCULOSKELETAL SYSTEM                    |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Bone                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             
 NERVOUS SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Brain                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             
 RESPIRATORY SYSTEM                        |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Lung                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Alveolar/Bronchiolar Adenoma         |                                                 X                        |             
      Leukemia Mononuclear                 |    X     X  X                                         X        X  X      |             
      Squamous Cell Carcinoma, Metastatic, |                                                                          |             
           Stomach                         |                            X                                             |             
                                            __________________________________________________________________________|             
   Nose                                    | +  +  M  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Trachea                                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             
 SPECIAL SENSES SYSTEM                     |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Eye                                     |                                                             +            |             
 _____________________________________________________________________________________________________________________|             
 URINARY SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Kidney                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |    X        X                                X                           |             
                                            __________________________________________________________________________|             
   Urinary Bladder                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             
 SYSTEMIC LESIONS                          |                                                                          |             
                                            __________________________________________________________________________|             
   Multiple Organs                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |    X     X  X  X  X                 X        X     X  X  X  X  X  X      |             
      Mesothelioma Malignant               |                   X                                                      |             
 _____________________________________________________________________________________________________________________|             
                                                             Page  95                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 6| 7| 6| 7| 7| 7| 7| 6| 7| 5| 5| 7| 4| 7| 6| 7| 7| 6| 5| 6| 7| 6| 6| 7| 7|            |
                             DAY ON TEST   | 1| 3| 9| 0| 3| 3| 3| 8| 0| 8| 3| 3| 9| 3| 9| 1| 3| 8| 1| 6| 3| 6| 0| 3| 3|            |
                                           | 9| 4| 9| 0| 4| 4| 3| 3| 7| 8| 6| 5| 3| 5| 2| 3| 5| 2| 7| 1| 6| 1| 5| 6| 6|            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     O      |
   FISCHER 344 RATS MALE                   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     T      |
                               ANIMAL ID   | 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 7| 7| 7| 7| 7|     A      |
    30 PPM                                 | 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 8| 8| 8| 8| 8| 9| 9| 9| 9| 9| 0| 0| 0| 0| 0|     L      |
     0-10                                  | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|            |
 __________________________________________________________________________________________________________________________________ 
 ALIMENTARY SYSTEM                         |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Esophagus                               | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Intestine Large                         | +  +  +  +  +  +  +  +  +  +  A  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
                                            __________________________________________________________________________|____________|
   Intestine Large, Cecum                  | +  +  +  +  +  +  +  +  +  +  A  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  48        |
                                            __________________________________________________________________________|____________|
   Intestine Large, Colon                  | +  +  +  +  +  +  +  +  +  +  A  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  48        |
                                            __________________________________________________________________________|____________|
   Intestine Large, Rectum                 | +  +  +  +  +  +  +  +  +  +  A  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  48        |
                                            __________________________________________________________________________|____________|
   Intestine Small                         | +  +  +  +  +  +  +  +  +  +  A  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
                                            __________________________________________________________________________|____________|
   Intestine Small, Duodenum               | +  +  +  +  +  +  +  +  +  +  A  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  48        |
                                            __________________________________________________________________________|____________|
   Intestine Small, Ileum                  | +  +  +  +  +  +  +  +  +  +  A  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  48        |
                                            __________________________________________________________________________|____________|
   Intestine Small, Jejunum                | +  +  +  +  +  +  +  +  +  +  A  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  48        |
      Leiomyosarcoma                       |                                                                          |          1 |
      Leiomyosarcoma, Metastatic, Mesentery|                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Liver                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Hepatocellular Carcinoma             |    X  X                                X                                 |         12 |
      Hepatocellular Carcinoma, Multiple   |             X                    X              X                        |          7 |
      Hepatocellular Adenoma               |                                                          X               |          2 |
      Hepatocellular Adenoma, Multiple     |    X  X  X  X  X  X  X  X  X     X     X  X  X  X  X        X     X  X  X|         36 |
      Leukemia Mononuclear                 | X     X  X  X           X     X  X     X  X        X  X  X  X  X  X  X  X|         28 |
      Squamous Cell Carcinoma, Metastatic, |                                                                          |            |
           Stomach                         |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Mesentery                               |                                                                          |   5        |
      Fibrosarcoma                         |                                                                          |          1 |
      Leukemia Mononuclear                 |                                                                          |          1 |
      Mesothelioma Malignant               |                                                                          |          1 |
      Squamous Cell Carcinoma, Metastatic, |                                                                          |            |
           Stomach                         |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Pancreas                                | +  +  +  +  +  +  +  +  +  +  A  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
      Squamous Cell Carcinoma, Metastatic, |                                                                          |            |
           Stomach                         |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Salivary Glands                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Stomach                                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Stomach, Forestomach                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Squamous Cell Carcinoma              |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Stomach, Glandular                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Tooth                                   |                                                                          |   1        |
 _____________________________________________________________________________________________________________________|            |
 CARDIOVASCULAR SYSTEM                     |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Heart                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 |                                                                          |          2 |
 _____________________________________________________________________________________________________________________|            |
 ENDOCRINE SYSTEM                          |                                                                          |            |
 __________________________________________________________________________________________________________________________________ 
                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  
                                                             Page  96                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 6| 7| 6| 7| 7| 7| 7| 6| 7| 5| 5| 7| 4| 7| 6| 7| 7| 6| 5| 6| 7| 6| 6| 7| 7|            |
                             DAY ON TEST   | 1| 3| 9| 0| 3| 3| 3| 8| 0| 8| 3| 3| 9| 3| 9| 1| 3| 8| 1| 6| 3| 6| 0| 3| 3|            |
                                           | 9| 4| 9| 0| 4| 4| 3| 3| 7| 8| 6| 5| 3| 5| 2| 3| 5| 2| 7| 1| 6| 1| 5| 6| 6|            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     O      |
   FISCHER 344 RATS MALE                   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     T      |
                               ANIMAL ID   | 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 7| 7| 7| 7| 7|     A      |
    30 PPM                                 | 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 8| 8| 8| 8| 8| 9| 9| 9| 9| 9| 0| 0| 0| 0| 0|     L      |
     0-10                                  | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|            |
 __________________________________________________________________________________________________________________________________ 
 ENDOCRINE SYSTEM - cont                   |                                                                          |            |
                                           |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Adrenal Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Adrenal Gland, Cortex                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 | X                                                                        |          2 |
                                            __________________________________________________________________________|____________|
   Adrenal Gland, Medulla                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 | X                                                                        |          2 |
      Pheochromocytoma Benign              |    X                                                                     |          2 |
                                            __________________________________________________________________________|____________|
   Islets, Pancreatic                      | +  +  +  +  +  +  +  +  +  +  A  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
      Adenoma                              |                                                                          |          2 |
                                            __________________________________________________________________________|____________|
   Parathyroid Gland                       | M  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
                                            __________________________________________________________________________|____________|
   Pituitary Gland                         | +  +  +  +  +  +  +  +  +  M  A  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  48        |
      Pars Distalis, Adenoma               |                         X           X                                X   |          4 |
                                            __________________________________________________________________________|____________|
   Thyroid Gland                           | +  +  +  +  +  +  +  +  +  +  A  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
      C-Cell, Adenoma                      |    X  X  X     X  X              X     X                                 |          8 |
      C-Cell, Adenoma, Multiple            |                                                    X                     |          1 |
      C-Cell, Carcinoma                    |                                                                          |          1 |
 _____________________________________________________________________________________________________________________|            |
 GENERAL BODY SYSTEM                       |                                                                          |            |
                                           |                                                                          |            |
    None                                   |                                                                          |            |
 _____________________________________________________________________________________________________________________|            |
 GENITAL SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Epididymis                              | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Serosa, Mesothelioma Malignant       |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Preputial Gland                         | +  +  +  +  +  +  +  +     M  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  44        |
      Adenoma                              |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Prostate                                | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +|  49        |
                                            __________________________________________________________________________|____________|
   Testes                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Bilateral, Interstitial Cell, Adenoma| X  X  X  X  X  X  X              X     X  X  X  X  X     X     X     X  X|         37 |
      Interstitial Cell, Adenoma           |                      X     X  X                             X            |          9 |
      Tunic, Mesothelioma Malignant        |                                                                          |          1 |
 _____________________________________________________________________________________________________________________|            |
 HEMATOPOIETIC SYSTEM                      |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Bone Marrow                             | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Femoral, Leukemia Mononuclear        | X                             X                    X  X                 X|         11 |
                                            __________________________________________________________________________|____________|
   Lymph Node                              | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
      Deep Cervical, Carcinoma, Metastatic,|                                                                          |            |
           Thyroid Gland                   |                                                                          |          1 |
      Inguinal, Leukemia Mononuclear       |                                                                          |          1 |
      Mandibular, Leukemia Mononuclear     | X     X  X  X           X     X                    X  X  X  X  X  X     X|         24 |
 __________________________________________________________________________________________________________________________________ 
                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  
                                                             Page  97                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 6| 7| 6| 7| 7| 7| 7| 6| 7| 5| 5| 7| 4| 7| 6| 7| 7| 6| 5| 6| 7| 6| 6| 7| 7|            |
                             DAY ON TEST   | 1| 3| 9| 0| 3| 3| 3| 8| 0| 8| 3| 3| 9| 3| 9| 1| 3| 8| 1| 6| 3| 6| 0| 3| 3|            |
                                           | 9| 4| 9| 0| 4| 4| 3| 3| 7| 8| 6| 5| 3| 5| 2| 3| 5| 2| 7| 1| 6| 1| 5| 6| 6|            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     O      |
   FISCHER 344 RATS MALE                   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     T      |
                               ANIMAL ID   | 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 7| 7| 7| 7| 7|     A      |
    30 PPM                                 | 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 8| 8| 8| 8| 8| 9| 9| 9| 9| 9| 0| 0| 0| 0| 0|     L      |
     0-10                                  | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|            |
 __________________________________________________________________________________________________________________________________ 
 HEMATOPOIETIC SYSTEM - cont               |                                                                          |            |
                                           |                                                                          |            |
      Mediastinal, Leukemia Mononuclear    | X           X        X                                         X         |          6 |
      Pancreatic, Leukemia Mononuclear     |                                                                          |          2 |
      Renal, Leukemia Mononuclear          |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Lymph Node, Mesenteric                  |                                                    +                     |   4        |
      Leukemia Mononuclear                 |                                                    X                     |          4 |
                                            __________________________________________________________________________|____________|
   Spleen                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 | X     X  X  X        X  X     X  X     X  X        X  X  X  X  X  X  X  X|         30 |
                                            __________________________________________________________________________|____________|
   Thymus                                  | M  +  +  +  +  +  +  M  +  +  +  +  M  +  +  +  +  +  M  +  +  +  +  +  +|  40        |
      Leukemia Mononuclear                 |                                                                X         |          3 |
 _____________________________________________________________________________________________________________________|            |
 INTEGUMENTARY SYSTEM                      |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Mammary Gland                           | +  +  +  +  +  +        +     +  +     +        +  +  +     +  +  +  +  +|  39        |
                                            __________________________________________________________________________|____________|
   Skin                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Squamous Cell Carcinoma              |                                                                          |          1 |
      Squamous Cell Papilloma              |                                        X                                 |          1 |
      Subcutaneous Tissue, Fibroma         |                                        X                                 |          2 |
      Subcutaneous Tissue, Fibroma,        |                                                                          |            |
          Multiple                         |                X  X                                                      |          2 |
      Subcutaneous Tissue, Fibrosarcoma    |                            X                                             |          2 |
      Subcutaneous Tissue, Hemangioma      |                                                                          |          1 |
      Subcutaneous Tissue, Lipoma          |                         X                                                |          1 |
      Subcutaneous Tissue, Neurofibroma    |                                                                          |          1 |
 _____________________________________________________________________________________________________________________|            |
 MUSCULOSKELETAL SYSTEM                    |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Bone                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
 _____________________________________________________________________________________________________________________|            |
 NERVOUS SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Brain                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
 _____________________________________________________________________________________________________________________|            |
 RESPIRATORY SYSTEM                        |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Lung                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Alveolar/Bronchiolar Adenoma         |                                                                      X  X|          3 |
      Leukemia Mononuclear                 | X     X                 X              X           X  X  X           X  X|         15 |
      Squamous Cell Carcinoma, Metastatic, |                                                                          |            |
           Stomach                         |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Nose                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
                                            __________________________________________________________________________|____________|
   Trachea                                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
 _____________________________________________________________________________________________________________________|            |
 SPECIAL SENSES SYSTEM                     |                                                                          |            |
                                           |                                                                          |            |
 __________________________________________________________________________________________________________________________________ 
                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  
                                                             Page  98                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 6| 7| 6| 7| 7| 7| 7| 6| 7| 5| 5| 7| 4| 7| 6| 7| 7| 6| 5| 6| 7| 6| 6| 7| 7|            |
                             DAY ON TEST   | 1| 3| 9| 0| 3| 3| 3| 8| 0| 8| 3| 3| 9| 3| 9| 1| 3| 8| 1| 6| 3| 6| 0| 3| 3|            |
                                           | 9| 4| 9| 0| 4| 4| 3| 3| 7| 8| 6| 5| 3| 5| 2| 3| 5| 2| 7| 1| 6| 1| 5| 6| 6|            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     O      |
   FISCHER 344 RATS MALE                   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     T      |
                               ANIMAL ID   | 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 7| 7| 7| 7| 7|     A      |
    30 PPM                                 | 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 8| 8| 8| 8| 8| 9| 9| 9| 9| 9| 0| 0| 0| 0| 0|     L      |
     0-10                                  | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|            |
 __________________________________________________________________________________________________________________________________ 
 SPECIAL SENSES SYSTEM - cont              |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Eye                                     |                      +              +        +        +                  |   5        |
 _____________________________________________________________________________________________________________________|            |
 URINARY SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Kidney                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 |                                                                          |          3 |
                                            __________________________________________________________________________|____________|
   Urinary Bladder                         | +  +  +  +  +  +  +  +  +  +  A  +  +  +  +  +  +  +  +  M  +  +  +  +  +|  48        |
 __________________________________________________________________________________________________________________________________ 
 SYSTEMIC LESIONS                          |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Multiple Organs                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 | X     X  X  X        X  X     X  X     X  X        X  X  X  X  X  X  X  X|         31 |
      Mesothelioma Malignant               |                                                                          |          1 |
 __________________________________________________________________________________________________________________________________ 
                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  
                                                             Page  99                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 7| 6| 5| 6| 7| 7| 6| 7| 6| 6| 4| 7| 4| 5| 6| 7| 7| 7| 7| 5| 7| 7| 7| 7| 6|             
                             DAY ON TEST   | 2| 5| 7| 8| 2| 2| 4| 2| 9| 9| 5| 2| 6| 8| 3| 2| 3| 3| 3| 7| 3| 3| 3| 3| 5|             
                                           | 7| 1| 2| 4| 7| 8| 4| 8| 6| 6| 0| 9| 1| 1| 7| 9| 0| 0| 0| 5| 1| 1| 1| 1| 7|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   FISCHER 344 RATS MALE                   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
                               ANIMAL ID   | 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7|             
    30 PPM                                 | 1| 1| 1| 1| 1| 2| 2| 2| 2| 2| 3| 3| 3| 3| 3| 4| 4| 4| 4| 4| 5| 5| 5| 5| 5|             
     10-10                                 | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|             
 _____________________________________________________________________________________________________________________|             
 ALIMENTARY SYSTEM                         |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Esophagus                               | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Large                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Large, Cecum                  | +  +  +  +  +  +  +  +  A  A  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Large, Colon                  | +  +  +  +  +  +  +  +  +  +  +  +  A  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Large, Rectum                 | +  +  M  +  +  +  +  +  A  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Small                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Small, Duodenum               | +  +  M  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Small, Ileum                  | +  +  +  +  +  +  +  +  A  A  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Small, Jejunum                | +  +  +  +  +  +  +  +  A  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leiomyoma                            |                                                                          |             
                                            __________________________________________________________________________|             
   Liver                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Hepatocellular Carcinoma             |                         X  X              X           X  X               |             
      Hepatocellular Carcinoma, Multiple   | X           X                                                  X  X      |             
      Hepatocellular Adenoma               |                   X                                                      |             
      Hepatocellular Adenoma, Multiple     | X  X  X  X  X  X     X     X     X        X  X  X  X  X     X  X  X  X   |             
      Leukemia Mononuclear                 |    X  X  X  X           X  X     X  X  X  X  X  X  X  X  X  X  X     X  X|             
                                            __________________________________________________________________________|             
   Mesentery                               |                                                                          |             
      Hemangiosarcoma                      |                                                                          |             
                                            __________________________________________________________________________|             
   Pancreas                                | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                X         |             
                                            __________________________________________________________________________|             
   Salivary Glands                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Stomach                                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Stomach, Forestomach                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                         X|             
      Squamous Cell Carcinoma              | X                                                                        |             
                                            __________________________________________________________________________|             
   Stomach, Glandular                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             
 CARDIOVASCULAR SYSTEM                     |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Heart                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                         X|             
      Schwannoma Malignant                 | X                                                                        |             
 _____________________________________________________________________________________________________________________|             
 ENDOCRINE SYSTEM                          |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Adrenal Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Adrenal Gland, Cortex                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |                                                                          |             
      Leukemia Mononuclear                 |    X                                X                                   X|             
                                            __________________________________________________________________________|             
   Adrenal Gland, Medulla                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |    X                                X                                   X|             
      Pheochromocytoma Benign              |                X                             X                           |             
                                            __________________________________________________________________________|             
   Islets, Pancreatic                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |                                                                          |             
                                            __________________________________________________________________________|             
   Parathyroid Gland                       | +  +  +  +  +  M  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |                            X                                             |             
 _____________________________________________________________________________________________________________________|             
                                                             Page 100                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 7| 6| 5| 6| 7| 7| 6| 7| 6| 6| 4| 7| 4| 5| 6| 7| 7| 7| 7| 5| 7| 7| 7| 7| 6|             
                             DAY ON TEST   | 2| 5| 7| 8| 2| 2| 4| 2| 9| 9| 5| 2| 6| 8| 3| 2| 3| 3| 3| 7| 3| 3| 3| 3| 5|             
                                           | 7| 1| 2| 4| 7| 8| 4| 8| 6| 6| 0| 9| 1| 1| 7| 9| 0| 0| 0| 5| 1| 1| 1| 1| 7|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   FISCHER 344 RATS MALE                   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
                               ANIMAL ID   | 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7|             
    30 PPM                                 | 1| 1| 1| 1| 1| 2| 2| 2| 2| 2| 3| 3| 3| 3| 3| 4| 4| 4| 4| 4| 5| 5| 5| 5| 5|             
     10-10                                 | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|             
 _____________________________________________________________________________________________________________________|             
 ENDOCRINE SYSTEM - cont                   |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Pituitary Gland                         | +  +  +  +  +  +  +  +  A  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |    X                                                                    X|             
      Pars Distalis, Adenoma               | X  X     X                    X                             X            |             
      Pars Intermedia, Adenoma             |                                                                          |             
                                            __________________________________________________________________________|             
   Thyroid Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                         X|             
      C-Cell, Adenoma                      | X        X        X                                X                     |             
      C-Cell, Carcinoma                    |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 GENERAL BODY SYSTEM                       |                                                                          |             
                                           |                                                                          |             
    None                                   |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 GENITAL SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Epididymis                              | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                         X|             
                                            __________________________________________________________________________|             
   Preputial Gland                         | +  +  +  +  +  +  M  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |          X                                                               |             
      Carcinoma                            |                                                                X         |             
                                            __________________________________________________________________________|             
   Prostate                                | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Testes                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Bilateral, Interstitial Cell, Adenoma| X     X  X  X  X     X     X     X     X  X  X  X  X  X  X  X  X  X  X  X|             
      Interstitial Cell, Adenoma           |                   X     X           X                                    |             
 _____________________________________________________________________________________________________________________|             
 HEMATOPOIETIC SYSTEM                      |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Bone Marrow                             | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Femoral, Leukemia Mononuclear        |    X  X  X              X  X        X     X                             X|             
                                            __________________________________________________________________________|             
   Lymph Node                              | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Mandibular, Leukemia Mononuclear     |    X  X  X  X           X  X     X  X  X           X     X        X  X  X|             
      Mediastinal, Leukemia Mononuclear    |                                                                          |             
                                            __________________________________________________________________________|             
   Lymph Node, Mesenteric                  |             +                                                           +|             
      Leukemia Mononuclear                 |             X                                                           X|             
                                            __________________________________________________________________________|             
   Spleen                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |    X  X  X  X           X  X     X  X  X  X  X  X  X  X  X  X  X  X  X  X|             
      Osteosarcoma, Metastatic, Bone       |                                                                          |             
                                            __________________________________________________________________________|             
   Thymus                                  | I  +  M  +  +  +  M  M  +  M  I  +  +  +  M  M  M  +  +  +  +  M  M  +  +|             
      Leukemia Mononuclear                 |             X           X                                               X|             
 _____________________________________________________________________________________________________________________|             
 INTEGUMENTARY SYSTEM                      |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Mammary Gland                           | +  +  +  +     +     +           +     +  +  +  +           +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Skin                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Squamous Cell Papilloma              |                X                                X                        |             
      Subcutaneous Tissue, Fibroma         |          X                                                               |             
 _____________________________________________________________________________________________________________________|             
 MUSCULOSKELETAL SYSTEM                    |                                                                          |             
                                           |                                                                          |             
 _____________________________________________________________________________________________________________________|             
                                                             Page 101                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 7| 6| 5| 6| 7| 7| 6| 7| 6| 6| 4| 7| 4| 5| 6| 7| 7| 7| 7| 5| 7| 7| 7| 7| 6|             
                             DAY ON TEST   | 2| 5| 7| 8| 2| 2| 4| 2| 9| 9| 5| 2| 6| 8| 3| 2| 3| 3| 3| 7| 3| 3| 3| 3| 5|             
                                           | 7| 1| 2| 4| 7| 8| 4| 8| 6| 6| 0| 9| 1| 1| 7| 9| 0| 0| 0| 5| 1| 1| 1| 1| 7|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   FISCHER 344 RATS MALE                   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
                               ANIMAL ID   | 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7|             
    30 PPM                                 | 1| 1| 1| 1| 1| 2| 2| 2| 2| 2| 3| 3| 3| 3| 3| 4| 4| 4| 4| 4| 5| 5| 5| 5| 5|             
     10-10                                 | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|             
 _____________________________________________________________________________________________________________________|             
 MUSCULOSKELETAL SYSTEM - cont             |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Bone                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Femur, Osteosarcoma                  |                                                                          |             
                                            __________________________________________________________________________|             
   Skeletal Muscle                         |                   +                                                      |             
      Rhabdomyosarcoma                     |                   X                                                      |             
 _____________________________________________________________________________________________________________________|             
 NERVOUS SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Brain                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                         X|             
      Oligodendroglioma Malignant          |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 RESPIRATORY SYSTEM                        |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Lung                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Alveolar/Bronchiolar Adenoma         |                                                                          |             
      Alveolar/Bronchiolar Adenoma,        |                                                                          |             
          Multiple                         |                                                                          |             
      Hepatocellular Carcinoma, Metastatic,|                                                                          |             
           Liver                           |                                                                          |             
      Leukemia Mononuclear                 |    X  X  X  X              X        X  X  X           X  X     X        X|             
                                            __________________________________________________________________________|             
   Nose                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Trachea                                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             
 SPECIAL SENSES SYSTEM                     |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Eye                                     |    +                                   +                                +|             
                                            __________________________________________________________________________|             
   Harderian Gland                         |    +                                                                     |             
 _____________________________________________________________________________________________________________________|             
 URINARY SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Kidney                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                         X|             
      Renal Tubule, Adenoma                |                                                                   X      |             
                                            __________________________________________________________________________|             
   Urinary Bladder                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             
 SYSTEMIC LESIONS                          |                                                                          |             
                                            __________________________________________________________________________|             
   Multiple Organs                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |    X  X  X  X           X  X     X  X  X  X  X  X  X  X  X  X  X  X  X  X|             
 _____________________________________________________________________________________________________________________|             
                                                             Page 102                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 6| 6| 7| 5| 6| 7| 5| 6| 5| 7| 7| 5| 7| 6| 7| 6| 6| 6| 7| 7| 6| 6| 4| 6| 7|            |
                             DAY ON TEST   | 8| 7| 3| 9| 9| 3| 8| 4| 1| 3| 2| 3| 2| 0| 1| 0| 0| 7| 0| 3| 4| 9| 6| 6| 3|            |
                                           | 6| 4| 5| 6| 5| 5| 1| 2| 5| 5| 9| 4| 6| 3| 8| 5| 5| 9| 8| 6| 3| 5| 2| 8| 6|            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     O      |
   FISCHER 344 RATS MALE                   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     T      |
                               ANIMAL ID   | 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 8| 8| 8| 8| 8|     A      |
    30 PPM                                 | 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 8| 8| 8| 8| 8| 9| 9| 9| 9| 9| 0| 0| 0| 0| 0|     L      |
     10-10                                 | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|            |
 __________________________________________________________________________________________________________________________________ 
 ALIMENTARY SYSTEM                         |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Esophagus                               | +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
                                            __________________________________________________________________________|____________|
   Intestine Large                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Intestine Large, Cecum                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +     +  +  +  +  +  +|  47        |
                                            __________________________________________________________________________|____________|
   Intestine Large, Colon                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  M  +  +     +  +  +  +  +  +|  47        |
                                            __________________________________________________________________________|____________|
   Intestine Large, Rectum                 | M  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +     +  +  +  +  +  +|  46        |
                                            __________________________________________________________________________|____________|
   Intestine Small                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Intestine Small, Duodenum               | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +     +  +  +  +  +  +|  48        |
                                            __________________________________________________________________________|____________|
   Intestine Small, Ileum                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +     +  +  +  +  +  +|  47        |
                                            __________________________________________________________________________|____________|
   Intestine Small, Jejunum                | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +     +  +  +  +  +  +|  48        |
      Leiomyoma                            |       X                                X                                 |          2 |
                                            __________________________________________________________________________|____________|
   Liver                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Hepatocellular Carcinoma             |    X  X     X     X        X  X           X           X                  |         13 |
      Hepatocellular Carcinoma, Multiple   | X              X                    X                    X     X        X|         10 |
      Hepatocellular Adenoma               |                                        X              X                  |          3 |
      Hepatocellular Adenoma, Multiple     |    X  X  X  X  X  X     X  X  X     X     X     X        X  X  X     X  X|         35 |
      Leukemia Mononuclear                 |    X  X  X  X     X  X  X     X  X     X  X  X  X           X  X     X   |         35 |
                                            __________________________________________________________________________|____________|
   Mesentery                               | +                                         +                              |   2        |
      Hemangiosarcoma                      |                                           X                              |          1 |
                                            __________________________________________________________________________|____________|
   Pancreas                                | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Salivary Glands                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +  +  +  +  +|  49        |
                                            __________________________________________________________________________|____________|
   Stomach                                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Stomach, Forestomach                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 |                                                                          |          1 |
      Squamous Cell Carcinoma              |                            X                                             |          2 |
                                            __________________________________________________________________________|____________|
   Stomach, Glandular                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +     +  +  +  +  +|  49        |
 _____________________________________________________________________________________________________________________|            |
 CARDIOVASCULAR SYSTEM                     |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Heart                                   | +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
      Leukemia Mononuclear                 |          X  X     X  X  X                                      X         |          7 |
      Schwannoma Malignant                 |                                                                          |          1 |
 _____________________________________________________________________________________________________________________|            |
 ENDOCRINE SYSTEM                          |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Adrenal Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Adrenal Gland, Cortex                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Adenoma                              |                                                    X                     |          1 |
      Leukemia Mononuclear                 |          X  X     X  X  X              X     X              X  X         |         12 |
                                            __________________________________________________________________________|____________|
   Adrenal Gland, Medulla                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 |          X  X     X  X  X              X     X              X  X         |         12 |
 __________________________________________________________________________________________________________________________________ 
                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  
                                                             Page 103                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 6| 6| 7| 5| 6| 7| 5| 6| 5| 7| 7| 5| 7| 6| 7| 6| 6| 6| 7| 7| 6| 6| 4| 6| 7|            |
                             DAY ON TEST   | 8| 7| 3| 9| 9| 3| 8| 4| 1| 3| 2| 3| 2| 0| 1| 0| 0| 7| 0| 3| 4| 9| 6| 6| 3|            |
                                           | 6| 4| 5| 6| 5| 5| 1| 2| 5| 5| 9| 4| 6| 3| 8| 5| 5| 9| 8| 6| 3| 5| 2| 8| 6|            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     O      |
   FISCHER 344 RATS MALE                   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     T      |
                               ANIMAL ID   | 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 8| 8| 8| 8| 8|     A      |
    30 PPM                                 | 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 8| 8| 8| 8| 8| 9| 9| 9| 9| 9| 0| 0| 0| 0| 0|     L      |
     10-10                                 | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|            |
 __________________________________________________________________________________________________________________________________ 
 ENDOCRINE SYSTEM - cont                   |                                                                          |            |
                                           |                                                                          |            |
      Pheochromocytoma Benign              |       X                                                                  |          3 |
                                            __________________________________________________________________________|____________|
   Islets, Pancreatic                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Adenoma                              |    X                                                                     |          1 |
                                            __________________________________________________________________________|____________|
   Parathyroid Gland                       | +  +  +  +  +  +  +  +  +  M  M  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  47        |
      Adenoma                              |                                                    X                     |          2 |
                                            __________________________________________________________________________|____________|
   Pituitary Gland                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
      Leukemia Mononuclear                 |                                                                          |          2 |
      Pars Distalis, Adenoma               |       X                       X     X     X                              |          9 |
      Pars Intermedia, Adenoma             |                                     X                                    |          1 |
                                            __________________________________________________________________________|____________|
   Thyroid Gland                           | +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
      Leukemia Mononuclear                 |                                                                          |          1 |
      C-Cell, Adenoma                      |                X        X              X        X              X  X     X|         11 |
      C-Cell, Carcinoma                    |                X                                                         |          1 |
 _____________________________________________________________________________________________________________________|            |
 GENERAL BODY SYSTEM                       |                                                                          |            |
                                           |                                                                          |            |
    None                                   |                                                                          |            |
 _____________________________________________________________________________________________________________________|            |
 GENITAL SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Epididymis                              | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Preputial Gland                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
      Adenoma                              |                                                                          |          1 |
      Carcinoma                            |    X     X                                            X           X      |          5 |
                                            __________________________________________________________________________|____________|
   Prostate                                | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Testes                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Bilateral, Interstitial Cell, Adenoma|    X        X  X           X  X  X  X  X  X  X  X  X  X  X     X        X|         36 |
      Interstitial Cell, Adenoma           |       X  X        X  X  X                                   X        X   |         10 |
 _____________________________________________________________________________________________________________________|            |
 HEMATOPOIETIC SYSTEM                      |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Bone Marrow                             | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Femoral, Leukemia Mononuclear        |    X                 X  X        X     X     X              X  X     X   |         17 |
                                            __________________________________________________________________________|____________|
   Lymph Node                              | +  +  +  +  +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +  +  +  +  +|  49        |
      Mandibular, Leukemia Mononuclear     |    X  X  X  X  X  X  X  X        X     X        X           X        X   |         27 |
      Mediastinal, Leukemia Mononuclear    |                                        X        X                        |          2 |
                                            __________________________________________________________________________|____________|
   Lymph Node, Mesenteric                  |                                                                          |   2        |
      Leukemia Mononuclear                 |                                                                          |          2 |
                                            __________________________________________________________________________|____________|
   Spleen                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 |    X  X  X  X     X  X  X     X  X     X  X  X  X           X  X     X   |         36 |
      Osteosarcoma, Metastatic, Bone       |                                                    X                     |          1 |
 __________________________________________________________________________________________________________________________________ 
                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  
                                                             Page 104                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 6| 6| 7| 5| 6| 7| 5| 6| 5| 7| 7| 5| 7| 6| 7| 6| 6| 6| 7| 7| 6| 6| 4| 6| 7|            |
                             DAY ON TEST   | 8| 7| 3| 9| 9| 3| 8| 4| 1| 3| 2| 3| 2| 0| 1| 0| 0| 7| 0| 3| 4| 9| 6| 6| 3|            |
                                           | 6| 4| 5| 6| 5| 5| 1| 2| 5| 5| 9| 4| 6| 3| 8| 5| 5| 9| 8| 6| 3| 5| 2| 8| 6|            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     O      |
   FISCHER 344 RATS MALE                   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     T      |
                               ANIMAL ID   | 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 8| 8| 8| 8| 8|     A      |
    30 PPM                                 | 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 8| 8| 8| 8| 8| 9| 9| 9| 9| 9| 0| 0| 0| 0| 0|     L      |
     10-10                                 | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|            |
 __________________________________________________________________________________________________________________________________ 
 HEMATOPOIETIC SYSTEM - cont               |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Thymus                                  | +  M  M  M  M  +  +  M  +  +  M  +  M  +  +  +  +  M  +  M  +  +  +  M  M|  28        |
      Leukemia Mononuclear                 |                                                 X              X         |          5 |
 _____________________________________________________________________________________________________________________|            |
 INTEGUMENTARY SYSTEM                      |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Mammary Gland                           | +     +  +        +  +        +  +        +     +     +  +     +     +  +|  30        |
                                            __________________________________________________________________________|____________|
   Skin                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Squamous Cell Papilloma              |                                                                          |          2 |
      Subcutaneous Tissue, Fibroma         |             X                       X                                    |          3 |
 _____________________________________________________________________________________________________________________|            |
 MUSCULOSKELETAL SYSTEM                    |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Bone                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Femur, Osteosarcoma                  |                                                    X                     |          1 |
                                            __________________________________________________________________________|____________|
   Skeletal Muscle                         |                                                                          |   1        |
      Rhabdomyosarcoma                     |                                                                          |          1 |
 _____________________________________________________________________________________________________________________|            |
 NERVOUS SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Brain                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 |                                                                          |          1 |
      Oligodendroglioma Malignant          |                                           X                              |          1 |
 _____________________________________________________________________________________________________________________|            |
 RESPIRATORY SYSTEM                        |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Lung                                    | +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
      Alveolar/Bronchiolar Adenoma         |                                                                         X|          1 |
      Alveolar/Bronchiolar Adenoma,        |                                                                          |            |
          Multiple                         |                                              X                           |          1 |
      Hepatocellular Carcinoma, Metastatic,|                                                                          |            |
           Liver                           | X                          X                                   X         |          3 |
      Leukemia Mononuclear                 |          X  X     X  X  X        X     X  X  X  X           X  X         |         24 |
                                            __________________________________________________________________________|____________|
   Nose                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Trachea                                 | +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
 _____________________________________________________________________________________________________________________|            |
 SPECIAL SENSES SYSTEM                     |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Eye                                     |                                     +                                    |   4        |
                                            __________________________________________________________________________|____________|
   Harderian Gland                         |                                                                          |   1        |
 _____________________________________________________________________________________________________________________|            |
 URINARY SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Kidney                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 |                      X                                                   |          2 |
      Renal Tubule, Adenoma                |                                                                          |          1 |
 __________________________________________________________________________________________________________________________________ 
                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  
                                                             Page 105                                                               
NTP Experiment-Test: 05077-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                         POLYBROMINATED BIPHENYL MIXTURE (FIREMASTER FF-1)                     Date: 04/10/97  
Route: DOSED FEED                                                                                                 Time: 08:19:31  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 6| 6| 7| 5| 6| 7| 5| 6| 5| 7| 7| 5| 7| 6| 7| 6| 6| 6| 7| 7| 6| 6| 4| 6| 7|            |
                             DAY ON TEST   | 8| 7| 3| 9| 9| 3| 8| 4| 1| 3| 2| 3| 2| 0| 1| 0| 0| 7| 0| 3| 4| 9| 6| 6| 3|            |
                                           | 6| 4| 5| 6| 5| 5| 1| 2| 5| 5| 9| 4| 6| 3| 8| 5| 5| 9| 8| 6| 3| 5| 2| 8| 6|            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     O      |
   FISCHER 344 RATS MALE                   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|     T      |
                               ANIMAL ID   | 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 8| 8| 8| 8| 8|     A      |
    30 PPM                                 | 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 8| 8| 8| 8| 8| 9| 9| 9| 9| 9| 0| 0| 0| 0| 0|     L      |
     10-10                                 | 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5|            |
 __________________________________________________________________________________________________________________________________ 
   Urinary Bladder                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
 __________________________________________________________________________________________________________________________________ 
 SYSTEMIC LESIONS                          |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Multiple Organs                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 |    X  X  X  X  X  X  X  X     X  X     X  X  X  X           X  X     X   |         37 |
 __________________________________________________________________________________________________________________________________ 
                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  
                                                             Page 106                                                               
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                                  ----------              END OF REPORT             ----------                                      
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NTP is located at the National Institute of Environmental Health Sciences, part of the National Institutes of Health.