National Toxicology Program

National Toxicology Program
https://ntp.niehs.nih.gov/go/2087

TR 386 Rat Pathology Tables

NTP Experiment-Test: 05072-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                                         TETRANITROMETHANE                                     Date: 04/16/97
Route: RESPIRATORY EXPOSURE WHOLE BODY                                                                            Time: 11:46:05




       Facility:  Midwest Research Institute

       Chemical CAS #:  509-14-8

       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: 05072-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                                         TETRANITROMETHANE                                     Date: 04/16/97  
Route: RESPIRATORY EXPOSURE WHOLE BODY                                                                            Time: 11:46:05  
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 6| 6| 7| 7| 5| 7| 6| 7| 7| 7| 7| 5| 6| 7| 6| 5| 4| 7| 7| 4| 7| 7| 7| 7| 7|             
                             DAY ON TEST   | 2| 4| 2| 2| 1| 2| 0| 2| 2| 2| 2| 9| 5| 2| 7| 4| 9| 2| 2| 5| 2| 2| 2| 2| 2|             
                                           | 9| 4| 7| 7| 0| 7| 2| 7| 7| 7| 8| 0| 9| 5| 4| 8| 1| 8| 8| 4| 8| 8| 9| 9| 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                 | 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| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 2| 2| 2| 2| 2| 2|             
    CONTROL                                | 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| 1| 2| 3| 4| 5|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 ALIMENTARY SYSTEM                         |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Esophagus                               | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Large                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Large, Cecum                  | A  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Large, Colon                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Large, Rectum                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Small                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Small, Duodenum               | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  A  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Small, Ileum                  | A  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  A  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Small, Jejunum                | +  +  +  +  +  +  A  +  +  +  +  +  +  A  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Liver                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Hepatocellular Adenoma               |                X                                                         |             
      Leukemia Mononuclear                 | X           X  X        X           X     X  X  X                    X   |             
                                            __________________________________________________________________________|             
   Mesentery                               |                                     +                                    |             
                                            __________________________________________________________________________|             
   Pancreas                                | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X                                                                        |             
                                            __________________________________________________________________________|             
   Salivary Glands                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                         X                                                |             
                                            __________________________________________________________________________|             
   Stomach                                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Stomach, Forestomach                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Stomach, Glandular                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +     +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             
 CARDIOVASCULAR SYSTEM                     |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Heart                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X           X                                X  X                        |             
 _____________________________________________________________________________________________________________________|             
 ENDOCRINE SYSTEM                          |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Adrenal Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Adrenal Gland, Cortex                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X           X  X                             X  X                        |             
                                            __________________________________________________________________________|             
   Adrenal Gland, Medulla                  | +  +  +  +  +  +  +  +  M  +  +  M  +  +  M  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X              X                             X  X                        |             
      Pheochromocytoma Benign              |                               X                                          |             
                                            __________________________________________________________________________|             
   Islets, Pancreatic                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Parathyroid Gland                       | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  M  M  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Pituitary Gland                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |             X  X                          X     X                        |             
      Pars Distalis, Adenoma               |    X     X        X  X     X  X        X  X        X  X     X  X  X  X  X|             
      Pars Distalis, Adenoma, Two          |                                                                          |             
      Pars Distalis, Carcinoma             |                                                                          |             
                                            __________________________________________________________________________|             
   Thyroid Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      C-Cell, Adenoma                      |                         X                 X                              |             
      C-Cell, Carcinoma                    |       X                    X                                             |             
 _____________________________________________________________________________________________________________________|             
 GENERAL BODY SYSTEM                       |                                                                          |             
                                           |                                                                          |             
    None                                   |                                                                          |             
 _____________________________________________________________________________________________________________________|             
                                                             Page   2                                                               
NTP Experiment-Test: 05072-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                                         TETRANITROMETHANE                                     Date: 04/16/97  
Route: RESPIRATORY EXPOSURE WHOLE BODY                                                                            Time: 11:46:05  
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 6| 6| 7| 7| 5| 7| 6| 7| 7| 7| 7| 5| 6| 7| 6| 5| 4| 7| 7| 4| 7| 7| 7| 7| 7|             
                             DAY ON TEST   | 2| 4| 2| 2| 1| 2| 0| 2| 2| 2| 2| 9| 5| 2| 7| 4| 9| 2| 2| 5| 2| 2| 2| 2| 2|             
                                           | 9| 4| 7| 7| 0| 7| 2| 7| 7| 7| 8| 0| 9| 5| 4| 8| 1| 8| 8| 4| 8| 8| 9| 9| 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                 | 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| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 2| 2| 2| 2| 2| 2|             
    CONTROL                                | 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| 1| 2| 3| 4| 5|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 GENITAL SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Clitoral Gland                          | +  +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |                               X                                          |             
      Carcinoma                            |       X                                                           X      |             
                                            __________________________________________________________________________|             
   Ovary                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X                                                                        |             
                                            __________________________________________________________________________|             
   Uterus                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Polyp Stromal                        |                            X  X                          X               |             
      Bilateral, Polyp Stromal             |                                                                          |             
                                            __________________________________________________________________________|             
   Vagina                                  |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 HEMATOPOIETIC SYSTEM                      |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Bone Marrow                             | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |             X                                                            |             
                                            __________________________________________________________________________|             
   Lymph Node                              | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                X                                                         |             
      Mediastinal, Leukemia Mononuclear    |             X  X                                                         |             
      Pancreatic, Leukemia Mononuclear     | X           X                                                            |             
                                            __________________________________________________________________________|             
   Lymph Node, Mandibular                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X           X  X                                                     X   |             
                                            __________________________________________________________________________|             
   Lymph Node, Mesenteric                  | +  +  +  +  +  +  +  +  M  +  +  +  +  M  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X           X  X                    X     X  X  X                    X   |             
                                            __________________________________________________________________________|             
   Spleen                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X           X  X        X           X     X  X  X                    X   |             
                                            __________________________________________________________________________|             
   Thymus                                  | +  +  +  +  M  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 INTEGUMENTARY SYSTEM                      |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Mammary Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Fibroadenoma                         |          X           X        X  X                             X         |             
      Fibroadenoma, Two                    |                                                                          |             
                                            __________________________________________________________________________|             
   Skin                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Keratoacanthoma                      |                                                             X            |             
      Subcutaneous Tissue, Fibrosarcoma    |                                                                          |             
      Subcutaneous Tissue, Sarcoma         |                                                                          |             
      Vulva, Papilloma                     |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 MUSCULOSKELETAL SYSTEM                    |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Bone                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             
 NERVOUS SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Brain                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Astrocytoma Benign                   |                                                                   X      |             
      Leukemia Mononuclear                 |             X                                                            |             
      Cerebellum, Meningioma Malignant     |                                                                          |             
 _____________________________________________________________________________________________________________________|             
                                                             Page   3                                                               
NTP Experiment-Test: 05072-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                                         TETRANITROMETHANE                                     Date: 04/16/97  
Route: RESPIRATORY EXPOSURE WHOLE BODY                                                                            Time: 11:46:05  
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 6| 6| 7| 7| 5| 7| 6| 7| 7| 7| 7| 5| 6| 7| 6| 5| 4| 7| 7| 4| 7| 7| 7| 7| 7|             
                             DAY ON TEST   | 2| 4| 2| 2| 1| 2| 0| 2| 2| 2| 2| 9| 5| 2| 7| 4| 9| 2| 2| 5| 2| 2| 2| 2| 2|             
                                           | 9| 4| 7| 7| 0| 7| 2| 7| 7| 7| 8| 0| 9| 5| 4| 8| 1| 8| 8| 4| 8| 8| 9| 9| 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                 | 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| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 2| 2| 2| 2| 2| 2|             
    CONTROL                                | 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| 1| 2| 3| 4| 5|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 NERVOUS SYSTEM - cont                     |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Spinal Cord                             |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 RESPIRATORY SYSTEM                        |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Larynx                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Lung                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X           X  X                    X     X  X  X                        |             
      Mediastinum, Leukemia Mononuclear    |                                                                          |             
                                            __________________________________________________________________________|             
   Nose                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Trachea                                 | +  +     +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             
 SPECIAL SENSES SYSTEM                     |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Eye                                     |                   +                                                      |             
                                            __________________________________________________________________________|             
   Lacrimal Gland                          |                   +                                                      |             
 _____________________________________________________________________________________________________________________|             
 URINARY SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Kidney                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X                                                                        |             
                                            __________________________________________________________________________|             
   Urinary Bladder                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             
 SYSTEMIC LESIONS                          |                                                                          |             
                                            __________________________________________________________________________|             
   Multiple Organs                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X           X  X        X           X     X  X  X                    X   |             
 _____________________________________________________________________________________________________________________|             
                                                             Page   4                                                               
NTP Experiment-Test: 05072-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                                         TETRANITROMETHANE                                     Date: 04/16/97  
Route: RESPIRATORY EXPOSURE WHOLE BODY                                                                            Time: 11:46:05  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 5| 7| 6| 7| 7| 7| 7| 7| 6| 5| 6| 7| 5| 7| 6| 7| 6| 2| 7| 5| 6| 7| 6| 0| 6|            |
                             DAY ON TEST   | 9| 2| 4| 2| 2| 2| 2| 2| 5| 2| 3| 2| 2| 2| 7| 2| 5| 5| 2| 1| 0| 2| 5| 0| 9|            |
                                           | 5| 9| 6| 9| 9| 9| 9| 9| 7| 0| 8| 7| 5| 7| 3| 7| 8| 1| 7| 3| 6| 7| 9| 8| 3|            |
 _____________________________________________________________________________________________________________________|     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   | 2| 2| 2| 2| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 5|     A      |
    CONTROL                                | 6| 7| 8| 9| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0|     L      |
                                           | 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|            |
 __________________________________________________________________________________________________________________________________ 
 ALIMENTARY SYSTEM                         |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Esophagus                               | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Intestine Large                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Intestine Large, Cecum                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
                                            __________________________________________________________________________|____________|
   Intestine Large, Colon                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Intestine Large, Rectum                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
                                            __________________________________________________________________________|____________|
   Intestine Small                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Intestine Small, Duodenum               | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
                                            __________________________________________________________________________|____________|
   Intestine Small, Ileum                  | A  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  A  +  +  +  +|  46        |
                                            __________________________________________________________________________|____________|
   Intestine Small, Jejunum                | +  +  +  +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  A  A  +  +  +  M|  44        |
                                            __________________________________________________________________________|____________|
   Liver                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Hepatocellular Adenoma               |                                                                          |          1 |
      Leukemia Mononuclear                 |                   X     X  X              X     X        X        X     X|         17 |
                                            __________________________________________________________________________|____________|
   Mesentery                               |    +                                      +  +                           |   4        |
                                            __________________________________________________________________________|____________|
   Pancreas                                | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 |                                                                   X      |          2 |
                                            __________________________________________________________________________|____________|
   Salivary Glands                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Stomach                                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Stomach, Forestomach                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Stomach, Glandular                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +  +|  48        |
 _____________________________________________________________________________________________________________________|            |
 CARDIOVASCULAR SYSTEM                     |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Heart                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 |                                                          X               |          5 |
 _____________________________________________________________________________________________________________________|            |
 ENDOCRINE SYSTEM                          |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Adrenal Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Adrenal Gland, Cortex                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 |                         X                                X        X     X|          9 |
                                            __________________________________________________________________________|____________|
   Adrenal Gland, Medulla                  | +  +  M  +  +  +  +  +  +  +  +  M  +  M  +  +  +  +  +  +  +  +  +  M  +|  43        |
      Leukemia Mononuclear                 |                         X                                         X     X|          7 |
      Pheochromocytoma Benign              |                                                                X         |          2 |
                                            __________________________________________________________________________|____________|
   Islets, Pancreatic                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Parathyroid Gland                       | +  +  +  +  +  +  M  +  +  +  +  +  +  +  +  M  M  +  +  +  +  +  +  M  +|  44        |
                                            __________________________________________________________________________|____________|
   Pituitary Gland                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 |                                                                   X      |          5 |
      Pars Distalis, Adenoma               | X  X     X           X  X        X  X        X        X     X     X     X|         27 |
      Pars Distalis, Adenoma, Two          |                                        X                                 |          1 |
      Pars Distalis, Carcinoma             |       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   5                                                               
NTP Experiment-Test: 05072-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                                         TETRANITROMETHANE                                     Date: 04/16/97  
Route: RESPIRATORY EXPOSURE WHOLE BODY                                                                            Time: 11:46:05  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 5| 7| 6| 7| 7| 7| 7| 7| 6| 5| 6| 7| 5| 7| 6| 7| 6| 2| 7| 5| 6| 7| 6| 0| 6|            |
                             DAY ON TEST   | 9| 2| 4| 2| 2| 2| 2| 2| 5| 2| 3| 2| 2| 2| 7| 2| 5| 5| 2| 1| 0| 2| 5| 0| 9|            |
                                           | 5| 9| 6| 9| 9| 9| 9| 9| 7| 0| 8| 7| 5| 7| 3| 7| 8| 1| 7| 3| 6| 7| 9| 8| 3|            |
 _____________________________________________________________________________________________________________________|     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   | 2| 2| 2| 2| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 5|     A      |
    CONTROL                                | 6| 7| 8| 9| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0|     L      |
                                           | 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|            |
 __________________________________________________________________________________________________________________________________ 
 ENDOCRINE SYSTEM - cont                   |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Thyroid Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  M  +|  49        |
      C-Cell, Adenoma                      |          X                                                               |          3 |
      C-Cell, Carcinoma                    |                                  X                                       |          3 |
 _____________________________________________________________________________________________________________________|            |
 GENERAL BODY SYSTEM                       |                                                                          |            |
                                           |                                                                          |            |
    None                                   |                                                                          |            |
 _____________________________________________________________________________________________________________________|            |
 GENITAL SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Clitoral Gland                          | +  +  +  +  +  +  +  +  M  +  +  +  +  +  +  +  +  +  +  +  +  +  +  M  +|  47        |
      Adenoma                              |                                                                          |          1 |
      Carcinoma                            |                                                                          |          2 |
                                            __________________________________________________________________________|____________|
   Ovary                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 |                                                          X               |          2 |
                                            __________________________________________________________________________|____________|
   Uterus                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Polyp Stromal                        |             X                       X                 X  X  X  X         |          9 |
      Bilateral, Polyp Stromal             |                            X                    X                        |          2 |
                                            __________________________________________________________________________|____________|
   Vagina                                  |                         +                                         +      |   2        |
 _____________________________________________________________________________________________________________________|            |
 HEMATOPOIETIC SYSTEM                      |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Bone Marrow                             | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  M     +  +  +  +  +  +|  48        |
      Leukemia Mononuclear                 |                                           X              X               |          3 |
                                            __________________________________________________________________________|____________|
   Lymph Node                              | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 |                            X                                             |          2 |
      Mediastinal, Leukemia Mononuclear    |                         X                 X              X        X      |          6 |
      Pancreatic, Leukemia Mononuclear     |                         X                                         X      |          4 |
                                            __________________________________________________________________________|____________|
   Lymph Node, Mandibular                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  M  +|  49        |
      Leukemia Mononuclear                 |                                                 X        X               |          6 |
                                            __________________________________________________________________________|____________|
   Lymph Node, Mesenteric                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +  +|  47        |
      Leukemia Mononuclear                 |                                                          X        X      |         10 |
                                            __________________________________________________________________________|____________|
   Spleen                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 |          X        X     X  X              X     X        X        X     X|         18 |
                                            __________________________________________________________________________|____________|
   Thymus                                  | M  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  48        |
      Leukemia Mononuclear                 |                                                 X        X               |          2 |
 _____________________________________________________________________________________________________________________|            |
 INTEGUMENTARY SYSTEM                      |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Mammary Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  M  +|  48        |
      Fibroadenoma                         |             X           X                                                |          7 |
      Fibroadenoma, Two                    |                                        X                                 |          1 |
                                            __________________________________________________________________________|____________|
   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   6                                                               
NTP Experiment-Test: 05072-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                                         TETRANITROMETHANE                                     Date: 04/16/97  
Route: RESPIRATORY EXPOSURE WHOLE BODY                                                                            Time: 11:46:05  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 5| 7| 6| 7| 7| 7| 7| 7| 6| 5| 6| 7| 5| 7| 6| 7| 6| 2| 7| 5| 6| 7| 6| 0| 6|            |
                             DAY ON TEST   | 9| 2| 4| 2| 2| 2| 2| 2| 5| 2| 3| 2| 2| 2| 7| 2| 5| 5| 2| 1| 0| 2| 5| 0| 9|            |
                                           | 5| 9| 6| 9| 9| 9| 9| 9| 7| 0| 8| 7| 5| 7| 3| 7| 8| 1| 7| 3| 6| 7| 9| 8| 3|            |
 _____________________________________________________________________________________________________________________|     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   | 2| 2| 2| 2| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 5|     A      |
    CONTROL                                | 6| 7| 8| 9| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0|     L      |
                                           | 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|            |
 __________________________________________________________________________________________________________________________________ 
 INTEGUMENTARY SYSTEM - cont               |                                                                          |            |
                                           |                                                                          |            |
      Keratoacanthoma                      |                                                                          |          1 |
      Subcutaneous Tissue, Fibrosarcoma    |                         X                                                |          1 |
      Subcutaneous Tissue, Sarcoma         |                            X                                             |          1 |
      Vulva, Papilloma                     |                                                                X         |          1 |
 _____________________________________________________________________________________________________________________|            |
 MUSCULOSKELETAL SYSTEM                    |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Bone                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +  +|  49        |
 _____________________________________________________________________________________________________________________|            |
 NERVOUS SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Brain                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Astrocytoma Benign                   |                                                                          |          1 |
      Leukemia Mononuclear                 |                                                                          |          1 |
      Cerebellum, Meningioma Malignant     |                                                    X                     |          1 |
                                            __________________________________________________________________________|____________|
   Spinal Cord                             |                                                                      +   |   1        |
 _____________________________________________________________________________________________________________________|            |
 RESPIRATORY SYSTEM                        |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Larynx                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  M  +|  48        |
                                            __________________________________________________________________________|____________|
   Lung                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 |                         X  X                    X        X        X     X|         13 |
      Mediastinum, Leukemia Mononuclear    |                                                 X                        |          1 |
                                            __________________________________________________________________________|____________|
   Nose                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +  +|  49        |
                                            __________________________________________________________________________|____________|
   Trachea                                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
 _____________________________________________________________________________________________________________________|            |
 SPECIAL SENSES SYSTEM                     |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Eye                                     |                                                             +     +  +   |   4        |
                                            __________________________________________________________________________|____________|
   Lacrimal Gland                          |                                                                +         |   2        |
 _____________________________________________________________________________________________________________________|            |
 URINARY SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Kidney                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 |                                                 X                        |          2 |
                                            __________________________________________________________________________|____________|
   Urinary Bladder                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  M  +  +|  49        |
 __________________________________________________________________________________________________________________________________ 
 SYSTEMIC LESIONS                          |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Multiple Organs                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 |          X        X     X  X              X     X        X        X     X|         18 |
 __________________________________________________________________________________________________________________________________ 
                         * : 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: 05072-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                                         TETRANITROMETHANE                                     Date: 04/16/97  
Route: RESPIRATORY EXPOSURE WHOLE BODY                                                                            Time: 11:46:05  
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 6| 7| 6| 7| 6| 6| 5| 5| 7| 5| 7| 7| 7| 5| 7| 5| 7| 6| 7| 7| 7| 6| 6| 5| 4|             
                             DAY ON TEST   | 1| 1| 7| 0| 9| 5| 7| 1| 2| 9| 2| 1| 2| 2| 2| 4| 2| 2| 2| 2| 0| 3| 8| 7| 9|             
                                           | 6| 4| 0| 2| 6| 8| 0| 2| 1| 0| 8| 7| 8| 0| 8| 5| 8| 6| 2| 8| 0| 3| 8| 6| 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   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 2| 2| 2| 2| 2| 2|             
    5 PPM                                  | 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| 1| 2| 3| 4| 5|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 ALIMENTARY SYSTEM                         |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Esophagus                               | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Large                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Large, Cecum                  | +  +  +  +  +  +  A  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia                             |                         X                                                |             
                                            __________________________________________________________________________|             
   Intestine Large, Colon                  | +  +  +  +  +  +  +  A  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia                             |                         X                                                |             
      Leukemia Mononuclear                 |                                              X                           |             
                                            __________________________________________________________________________|             
   Intestine Large, Rectum                 | +  +  +  +  +  +  +  A  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia                             |                         X                                                |             
                                            __________________________________________________________________________|             
   Intestine Small                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Small, Duodenum               | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leiomyoma                            |                                                                          |             
      Leukemia                             |                         X                                                |             
      Leukemia Mononuclear                 |                                              X                           |             
                                            __________________________________________________________________________|             
   Intestine Small, Ileum                  | +  A  +  +  +  +  +  A  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia                             |                         X                                                |             
      Leukemia Mononuclear                 |                                              X                           |             
                                            __________________________________________________________________________|             
   Intestine Small, Jejunum                | +  A  A  +  +  +  A  A  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia                             |                         X                                                |             
                                            __________________________________________________________________________|             
   Liver                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Alveolar/Bronchiolar Carcinoma,      |                                                                          |             
          Metastatic, Lung                 |                                                                          |             
      Hepatocellular Carcinoma             |             X                                                            |             
      Leukemia                             |                         X                                                |             
      Leukemia Mononuclear                 |                                              X                           |             
      Sarcoma, Metastatic, Lung            |                                                                X         |             
                                            __________________________________________________________________________|             
   Mesentery                               |       +                 +                                                |             
      Alveolar/Bronchiolar Carcinoma,      |                                                                          |             
          Metastatic, Lung                 |                                                                          |             
      Leukemia, Multifocal                 |                         X                                                |             
      Sarcoma, Metastatic, Uncertain       |                                                                          |             
          Primary Site                     |       X                                                                  |             
      Sarcoma, Metastatic, Uterus          |                                                                          |             
                                            __________________________________________________________________________|             
   Pancreas                                | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Alveolar/Bronchiolar Carcinoma,      |                                                                          |             
          Metastatic, Lung                 | X              X                                                         |             
      Leukemia                             |                         X                                                |             
      Mixed Tumor Malignant, Metastatic,   |                                                                          |             
           Lung                            |                                                                X         |             
      Sarcoma, Metastatic, Lung            |                                                                          |             
                                            __________________________________________________________________________|             
   Salivary Glands                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Alveolar/Bronchiolar Carcinoma,      |                                                                          |             
          Metastatic, Lung                 |                                                                          |             
      Leukemia                             |                         X                                                |             
 _____________________________________________________________________________________________________________________|             
                                                             Page   8                                                               
NTP Experiment-Test: 05072-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                                         TETRANITROMETHANE                                     Date: 04/16/97  
Route: RESPIRATORY EXPOSURE WHOLE BODY                                                                            Time: 11:46:05  
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 6| 7| 6| 7| 6| 6| 5| 5| 7| 5| 7| 7| 7| 5| 7| 5| 7| 6| 7| 7| 7| 6| 6| 5| 4|             
                             DAY ON TEST   | 1| 1| 7| 0| 9| 5| 7| 1| 2| 9| 2| 1| 2| 2| 2| 4| 2| 2| 2| 2| 0| 3| 8| 7| 9|             
                                           | 6| 4| 0| 2| 6| 8| 0| 2| 1| 0| 8| 7| 8| 0| 8| 5| 8| 6| 2| 8| 0| 3| 8| 6| 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   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 2| 2| 2| 2| 2| 2|             
    5 PPM                                  | 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| 1| 2| 3| 4| 5|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 ALIMENTARY SYSTEM - cont                  |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Stomach                                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Stomach, Forestomach                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Stomach, Glandular                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             
 CARDIOVASCULAR SYSTEM                     |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Heart                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Alveolar/Bronchiolar Carcinoma,      |                                                                          |             
          Multiple, Metastatic, Lung       |                                                                          |             
      Alveolar/Bronchiolar Carcinoma,      |                                                                          |             
          Metastatic, Lung                 | X                    X                                                   |             
      Leukemia                             |                         X                                                |             
      Sarcoma, Multiple, Metastatic, Lung  |                                                                          |             
      Epicardium, Carcinoma, Metastatic,   |                                                                          |             
           Lung                            |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 ENDOCRINE SYSTEM                          |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Adrenal Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Capsule, Leukemia                    |                         X                                                |             
                                            __________________________________________________________________________|             
   Adrenal Gland, Cortex                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              | X                                X                                       |             
      Alveolar/Bronchiolar Carcinoma,      |                                                                          |             
          Metastatic, Lung                 |             X                                   X                 X      |             
      Carcinoma                            |          X                                                               |             
      Carcinoma, Metastatic, Lung          |                                                                          |             
      Leukemia Mononuclear                 |                                              X                           |             
      Medulla, Alveolar/Bronchiolar        |                                                                          |             
          Carcinoma, Metastatic, Lung      |                X                                                         |             
                                            __________________________________________________________________________|             
   Adrenal Gland, Medulla                  | +  +  +  +  +     +  +  M  +  +  +  +  +  +  M  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                          |             
      Pheochromocytoma Complex             |                                                                          |             
      Pheochromocytoma Benign              |                               X                                          |             
      Sarcoma, Metastatic, Lung            |                                                                          |             
      Bilateral, Pheochromocytoma Benign   |                                                       X                  |             
                                            __________________________________________________________________________|             
   Islets, Pancreatic                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Carcinoma                            |                                                                          |             
                                            __________________________________________________________________________|             
   Parathyroid Gland                       | +  +  +  M  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  M  M  +  +  +|             
                                            __________________________________________________________________________|             
   Pituitary Gland                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                              X                           |             
      Pars Distalis, Adenoma               |       X     X  X     X  X  X  X     X  X        X  X     X        X      |             
      Pars Distalis, Adenoma, Two          |                                                                          |             
      Pars Distalis, Alveolar/Bronchiolar  |                                                                          |             
          Carcinoma, Metastatic, Lung      |                X                                                         |             
      Pars Intermedia, Adenoma             |                                                                      X   |             
                                            __________________________________________________________________________|             
   Thyroid Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             
                                                             Page   9                                                               
NTP Experiment-Test: 05072-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                                         TETRANITROMETHANE                                     Date: 04/16/97  
Route: RESPIRATORY EXPOSURE WHOLE BODY                                                                            Time: 11:46:05  
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 6| 7| 6| 7| 6| 6| 5| 5| 7| 5| 7| 7| 7| 5| 7| 5| 7| 6| 7| 7| 7| 6| 6| 5| 4|             
                             DAY ON TEST   | 1| 1| 7| 0| 9| 5| 7| 1| 2| 9| 2| 1| 2| 2| 2| 4| 2| 2| 2| 2| 0| 3| 8| 7| 9|             
                                           | 6| 4| 0| 2| 6| 8| 0| 2| 1| 0| 8| 7| 8| 0| 8| 5| 8| 6| 2| 8| 0| 3| 8| 6| 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   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 2| 2| 2| 2| 2| 2|             
    5 PPM                                  | 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| 1| 2| 3| 4| 5|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 ENDOCRINE SYSTEM - cont                   |                                                                          |             
                                           |                                                                          |             
      C-Cell, Adenoma                      |             X                                   X        X               |             
      C-Cell, Carcinoma                    |                                                                          |             
      Follicular Cell, Adenoma             |                                                                          |             
      Follicular Cell, Carcinoma           |                                                    X                     |             
 _____________________________________________________________________________________________________________________|             
 GENERAL BODY SYSTEM                       |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Tissue NOS                              |       +                                                     +            |             
      Alveolar/Bronchiolar Carcinoma,      |                                                                          |             
          Multiple, Metastatic, Lung       |                                                                          |             
      Sarcoma, Metastatic, Uncertain       |                                                                          |             
          Primary Site                     |       X                                                                  |             
      Squamous Cell Carcinoma, Metastatic, |                                                                          |             
           Lung                            |                                                             X            |             
 _____________________________________________________________________________________________________________________|             
 GENITAL SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Clitoral Gland                          | +  +  M  +  +  +  +  +  M  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Ovary                                   | +  +  +  +  +  +  +  +  +  +  +  I  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Alveolar/Bronchiolar Carcinoma,      |                                                                          |             
          Metastatic, Lung                 |                X                                               X  X      |             
      Leukemia                             |                         X                                                |             
      Leukemia Mononuclear                 |                                                                          |             
      Bilateral, Carcinoma, Metastatic,    |                                                                          |             
           Lung                            |                                                                          |             
      Bilateral, Sarcoma, Metastatic, Lung |                                                                X         |             
                                            __________________________________________________________________________|             
   Uterus                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia                             |                         X                                                |             
      Polyp Stromal                        |    X                 X              X                                    |             
      Sarcoma                              |                                                                         X|             
 _____________________________________________________________________________________________________________________|             
 HEMATOPOIETIC SYSTEM                      |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Blood                                   |                         I                                                |             
                                            __________________________________________________________________________|             
   Bone Marrow                             | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia                             |                         X                                                |             
      Leukemia Mononuclear                 |                                              X                           |             
                                            __________________________________________________________________________|             
   Lymph Node                              | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Sarcoma, Metastatic, Lung            |                                                                X         |             
      Mediastinal, Alveolar/Bronchiolar    |                                                                          |             
          Carcinoma, Metastatic, Lung      |          X     X           X                                      X      |             
      Mediastinal, Carcinoma, Metastatic,  |                                                                          |             
           Lung                            |                                                                          |             
      Mediastinal, Leukemia Mononuclear    |                                              X                           |             
      Pancreatic, Leukemia Mononuclear     |                                                                          |             
      Serosa, Mediastinal, Sarcoma,        |                                                                          |             
          Metastatic, Uncertain Primary    |                                                                          |             
 _____________________________________________________________________________________________________________________|             
                                                             Page  10                                                               
NTP Experiment-Test: 05072-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                                         TETRANITROMETHANE                                     Date: 04/16/97  
Route: RESPIRATORY EXPOSURE WHOLE BODY                                                                            Time: 11:46:05  
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 6| 7| 6| 7| 6| 6| 5| 5| 7| 5| 7| 7| 7| 5| 7| 5| 7| 6| 7| 7| 7| 6| 6| 5| 4|             
                             DAY ON TEST   | 1| 1| 7| 0| 9| 5| 7| 1| 2| 9| 2| 1| 2| 2| 2| 4| 2| 2| 2| 2| 0| 3| 8| 7| 9|             
                                           | 6| 4| 0| 2| 6| 8| 0| 2| 1| 0| 8| 7| 8| 0| 8| 5| 8| 6| 2| 8| 0| 3| 8| 6| 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   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 2| 2| 2| 2| 2| 2|             
    5 PPM                                  | 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| 1| 2| 3| 4| 5|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 HEMATOPOIETIC SYSTEM - cont               |                                                                          |             
                                           |                                                                          |             
          Site                             |       X                                                                  |             
                                            __________________________________________________________________________|             
   Lymph Node, Mandibular                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia                             |                         X                                                |             
      Leukemia Mononuclear                 |                                              X                           |             
                                            __________________________________________________________________________|             
   Lymph Node, Mesenteric                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia                             |                         X                                                |             
      Leukemia Mononuclear                 |                                              X                           |             
                                            __________________________________________________________________________|             
   Spleen                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia                             |                         X                                                |             
      Leukemia Mononuclear                 |                                              X                 X         |             
      Squamous Cell Carcinoma, Metastatic, |                                                                          |             
           Lung                            |                                                                          |             
                                            __________________________________________________________________________|             
   Thymus                                  | +  +  M  +  +  +  M  M  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Alveolar/Bronchiolar Carcinoma,      |                                                                          |             
          Metastatic, Lung                 | X                                                              X         |             
      Leukemia                             |                         X                                                |             
      Leukemia Mononuclear                 |                                              X                           |             
 _____________________________________________________________________________________________________________________|             
 INTEGUMENTARY SYSTEM                      |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Mammary Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |                                                                          |             
      Fibroadenoma                         |          X                                                               |             
      Fibroadenoma, Two                    |                         X                          X                     |             
                                            __________________________________________________________________________|             
   Skin                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Keratoacanthoma                      |                                                                          |             
      Squamous Cell Papilloma              |                   X                                                      |             
      Subcutaneous Tissue,                 |                                                                          |             
          Alveolar/Bronchiolar Carcinoma,  |                                                                          |             
           Metastatic                      |                                                                          |             
      Subcutaneous Tissue,                 |                                                                          |             
          Alveolar/Bronchiolar Carcinoma,  |                                                                          |             
           Metastatic, Lung                |                                                                          |             
      Subcutaneous Tissue, Fibroma         |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 MUSCULOSKELETAL SYSTEM                    |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Bone                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             
 NERVOUS SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Brain                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Astrocytoma Malignant                |                                                    X                     |             
                                            __________________________________________________________________________|             
   Spinal Cord                             |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 RESPIRATORY SYSTEM                        |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Larynx                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             
                                                             Page  11                                                               
NTP Experiment-Test: 05072-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                                         TETRANITROMETHANE                                     Date: 04/16/97  
Route: RESPIRATORY EXPOSURE WHOLE BODY                                                                            Time: 11:46:05  
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 6| 7| 6| 7| 6| 6| 5| 5| 7| 5| 7| 7| 7| 5| 7| 5| 7| 6| 7| 7| 7| 6| 6| 5| 4|             
                             DAY ON TEST   | 1| 1| 7| 0| 9| 5| 7| 1| 2| 9| 2| 1| 2| 2| 2| 4| 2| 2| 2| 2| 0| 3| 8| 7| 9|             
                                           | 6| 4| 0| 2| 6| 8| 0| 2| 1| 0| 8| 7| 8| 0| 8| 5| 8| 6| 2| 8| 0| 3| 8| 6| 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   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 2| 2| 2| 2| 2| 2|             
    5 PPM                                  | 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| 1| 2| 3| 4| 5|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 RESPIRATORY SYSTEM - cont                 |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Lung                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Alveolar/Bronchiolar Adenoma         | X                                                                        |             
      Alveolar/Bronchiolar Carcinoma       |                   X                                                     X|             
      Alveolar/Bronchiolar Carcinoma,      |                                                                          |             
          Multiple                         | X  X     X  X  X     X  X  X  X     X  X  X  X  X  X  X  X  X  X  X  X   |             
      Alveolar/Bronchiolar Carcinoma, Two  |       X                          X                                       |             
      Leukemia                             |                         X                                                |             
      Leukemia Mononuclear                 |                                              X                           |             
      Mixed Tumor Malignant, Multiple      |                                                                X         |             
      Osteosarcoma, Metastatic, Uncertain  |                                                                          |             
          Primary Site                     |                X                                                         |             
      Sarcoma, Multiple                    |                                                                          |             
      Squamous Cell Carcinoma              |       X  X  X        X                    X                          X   |             
      Squamous Cell Carcinoma, Multiple    |                                                             X            |             
      Mediastinum, Carcinoma, Metastatic,  |                                                                          |             
           Lung                            |                                                                          |             
      Mediastinum, Leukemia                |                         X                                                |             
      Mediastinum, Squamous Cell Carcinoma,|                                                                          |             
           Metastatic, Lung                |                                                             X            |             
      Pleura, Mediastinum, Sarcoma,        |                                                                          |             
          Metastatic, Uncertain Primary    |                                                                          |             
          Site                             |       X                                                                  |             
                                            __________________________________________________________________________|             
   Nose                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Trachea                                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             
 SPECIAL SENSES SYSTEM                     |                                                                          |             
                                           |                                                                          |             
    None                                   |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 URINARY SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Kidney                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Alveolar/Bronchiolar Carcinoma,      |                                                                          |             
          Multiple, Metastatic, Lung       |                X                                                         |             
      Alveolar/Bronchiolar Carcinoma,      |                                                                          |             
          Metastatic, Lung                 | X                          X                                   X  X      |             
      Carcinoma, Metastatic, Lung          |                                                                          |             
      Leukemia                             |                         X                                                |             
      Leukemia Mononuclear                 |                                              X                           |             
      Osteosarcoma, Metastatic, Uncertain  |                                                                          |             
          Primary Site                     |                X                                                         |             
      Sarcoma, Metastatic, Lung            |                                                                X         |             
                                            __________________________________________________________________________|             
   Urinary Bladder                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia                             |                         X                                                |             
 _____________________________________________________________________________________________________________________|             
 SYSTEMIC LESIONS                          |                                                                          |             
                                            __________________________________________________________________________|             
   Multiple Organs                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             
                                                             Page  12                                                               
NTP Experiment-Test: 05072-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                                         TETRANITROMETHANE                                     Date: 04/16/97  
Route: RESPIRATORY EXPOSURE WHOLE BODY                                                                            Time: 11:46:05  
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 6| 7| 6| 7| 6| 6| 5| 5| 7| 5| 7| 7| 7| 5| 7| 5| 7| 6| 7| 7| 7| 6| 6| 5| 4|             
                             DAY ON TEST   | 1| 1| 7| 0| 9| 5| 7| 1| 2| 9| 2| 1| 2| 2| 2| 4| 2| 2| 2| 2| 0| 3| 8| 7| 9|             
                                           | 6| 4| 0| 2| 6| 8| 0| 2| 1| 0| 8| 7| 8| 0| 8| 5| 8| 6| 2| 8| 0| 3| 8| 6| 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   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 2| 2| 2| 2| 2| 2|             
    5 PPM                                  | 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| 1| 2| 3| 4| 5|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 SYSTEMIC LESIONS - cont                   |                                                                          |             
                                           |                                                                          |             
      Leukemia                             |                         X                                                |             
      Leukemia Mononuclear                 |                                              X                 X         |             
 _____________________________________________________________________________________________________________________|             
                                                             Page  13                                                               
NTP Experiment-Test: 05072-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                                         TETRANITROMETHANE                                     Date: 04/16/97  
Route: RESPIRATORY EXPOSURE WHOLE BODY                                                                            Time: 11:46:05  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 7| 6| 6| 7| 6| 6| 7| 7| 7| 5| 7| 7| 7| 7| 6| 5| 5| 7| 5| 7| 6| 4| 7| 6| 7|            |
                             DAY ON TEST   | 2| 8| 4| 2| 9| 6| 2| 1| 2| 6| 2| 2| 2| 2| 9| 6| 8| 2| 3| 2| 9| 7| 2| 6| 2|            |
                                           | 2| 9| 6| 8| 5| 7| 8| 9| 0| 7| 8| 8| 8| 8| 6| 0| 4| 8| 4| 8| 5| 5| 8| 5| 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   | 2| 2| 2| 2| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 5|     A      |
    5 PPM                                  | 6| 7| 8| 9| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0|     L      |
                                           | 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|            |
 __________________________________________________________________________________________________________________________________ 
 ALIMENTARY SYSTEM                         |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Esophagus                               | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Intestine Large                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Intestine Large, Cecum                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  A  +|  48        |
      Leukemia                             |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Intestine Large, Colon                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  A  +|  48        |
      Leukemia                             |                                                                          |          1 |
      Leukemia Mononuclear                 |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Intestine Large, Rectum                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
      Leukemia                             |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Intestine Small                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +     +  +  +  +|  49        |
                                            __________________________________________________________________________|____________|
   Intestine Small, Duodenum               | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +     +  +  +  +|  49        |
      Leiomyoma                            |                                                                         X|          1 |
      Leukemia                             |                                                                          |          1 |
      Leukemia Mononuclear                 |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Intestine Small, Ileum                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +     +  +  A  +|  46        |
      Leukemia                             |                                                                          |          1 |
      Leukemia Mononuclear                 |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Intestine Small, Jejunum                | +  +  +  +  +  +  +  +  +  +  +  +  +  +  A  +  +  +  +  +     +  +  A  +|  43        |
      Leukemia                             |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Liver                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Alveolar/Bronchiolar Carcinoma,      |                                                                          |            |
          Metastatic, Lung                 |             X                                                            |          1 |
      Hepatocellular Carcinoma             |                                                                          |          1 |
      Leukemia                             |                                                                          |          1 |
      Leukemia Mononuclear                 |                         X     X     X                          X         |          5 |
      Sarcoma, Metastatic, Lung            |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Mesentery                               | +     +  +     +                                +     +                  |   8        |
      Alveolar/Bronchiolar Carcinoma,      |                                                                          |            |
          Metastatic, Lung                 | X                                                                        |          1 |
      Leukemia, Multifocal                 |                                                                          |          1 |
      Sarcoma, Metastatic, Uncertain       |                                                                          |            |
          Primary Site                     |                                                                          |          1 |
      Sarcoma, Metastatic, Uterus          |       X                                                                  |          1 |
                                            __________________________________________________________________________|____________|
   Pancreas                                | +  +  +  +  M  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
      Alveolar/Bronchiolar Carcinoma,      |                                                                          |            |
          Metastatic, Lung                 |                                     X                                    |          3 |
      Leukemia                             |                                                                          |          1 |
      Mixed Tumor Malignant, Metastatic,   |                                                                          |            |
           Lung                            |                                                                          |          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  14                                                               
NTP Experiment-Test: 05072-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                                         TETRANITROMETHANE                                     Date: 04/16/97  
Route: RESPIRATORY EXPOSURE WHOLE BODY                                                                            Time: 11:46:05  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 7| 6| 6| 7| 6| 6| 7| 7| 7| 5| 7| 7| 7| 7| 6| 5| 5| 7| 5| 7| 6| 4| 7| 6| 7|            |
                             DAY ON TEST   | 2| 8| 4| 2| 9| 6| 2| 1| 2| 6| 2| 2| 2| 2| 9| 6| 8| 2| 3| 2| 9| 7| 2| 6| 2|            |
                                           | 2| 9| 6| 8| 5| 7| 8| 9| 0| 7| 8| 8| 8| 8| 6| 0| 4| 8| 4| 8| 5| 5| 8| 5| 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   | 2| 2| 2| 2| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 5|     A      |
    5 PPM                                  | 6| 7| 8| 9| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0|     L      |
                                           | 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|            |
 __________________________________________________________________________________________________________________________________ 
 ALIMENTARY SYSTEM - cont                  |                                                                          |            |
                                           |                                                                          |            |
      Sarcoma, Metastatic, Lung            |                      X                                                   |          1 |
                                            __________________________________________________________________________|____________|
   Salivary Glands                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Alveolar/Bronchiolar Carcinoma,      |                                                                          |            |
          Metastatic, Lung                 |                                           X                              |          1 |
      Leukemia                             |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Stomach                                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Stomach, Forestomach                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Stomach, Glandular                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
 _____________________________________________________________________________________________________________________|            |
 CARDIOVASCULAR SYSTEM                     |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Heart                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Alveolar/Bronchiolar Carcinoma,      |                                                                          |            |
          Multiple, Metastatic, Lung       |                                           X                              |          1 |
      Alveolar/Bronchiolar Carcinoma,      |                                                                          |            |
          Metastatic, Lung                 |                X                                                         |          3 |
      Leukemia                             |                                                                          |          1 |
      Sarcoma, Multiple, Metastatic, Lung  |                      X                                                   |          1 |
      Epicardium, Carcinoma, Metastatic,   |                                                                          |            |
           Lung                            |                                                             X            |          1 |
 _____________________________________________________________________________________________________________________|            |
 ENDOCRINE SYSTEM                          |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Adrenal Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Capsule, Leukemia                    |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Adrenal Gland, Cortex                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Adenoma                              |                                                    X                     |          3 |
      Alveolar/Bronchiolar Carcinoma,      |                                                                          |            |
          Metastatic, Lung                 |             X                             X                              |          5 |
      Carcinoma                            |                                                                          |          1 |
      Carcinoma, Metastatic, Lung          |                                                             X            |          1 |
      Leukemia Mononuclear                 |                                     X                          X         |          3 |
      Medulla, Alveolar/Bronchiolar        |                                                                          |            |
          Carcinoma, Metastatic, Lung      | X                                                                        |          2 |
                                            __________________________________________________________________________|____________|
   Adrenal Gland, Medulla                  |    +  M  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  45        |
      Leukemia Mononuclear                 |                                     X                                    |          1 |
      Pheochromocytoma Complex             |                                  X                                       |          1 |
      Pheochromocytoma Benign              |                                                          X               |          2 |
      Sarcoma, Metastatic, Lung            |                      X                                                   |          1 |
      Bilateral, Pheochromocytoma Benign   |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Islets, Pancreatic                      | +  +  +  +  M  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
 __________________________________________________________________________________________________________________________________ 
                         * : 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  15                                                               
NTP Experiment-Test: 05072-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                                         TETRANITROMETHANE                                     Date: 04/16/97  
Route: RESPIRATORY EXPOSURE WHOLE BODY                                                                            Time: 11:46:05  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 7| 6| 6| 7| 6| 6| 7| 7| 7| 5| 7| 7| 7| 7| 6| 5| 5| 7| 5| 7| 6| 4| 7| 6| 7|            |
                             DAY ON TEST   | 2| 8| 4| 2| 9| 6| 2| 1| 2| 6| 2| 2| 2| 2| 9| 6| 8| 2| 3| 2| 9| 7| 2| 6| 2|            |
                                           | 2| 9| 6| 8| 5| 7| 8| 9| 0| 7| 8| 8| 8| 8| 6| 0| 4| 8| 4| 8| 5| 5| 8| 5| 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   | 2| 2| 2| 2| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 5|     A      |
    5 PPM                                  | 6| 7| 8| 9| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0|     L      |
                                           | 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|            |
 __________________________________________________________________________________________________________________________________ 
 ENDOCRINE SYSTEM - cont                   |                                                                          |            |
                                           |                                                                          |            |
      Carcinoma                            |                                                 X                        |          1 |
                                            __________________________________________________________________________|____________|
   Parathyroid Gland                       | +  +  +  +  +  +  +  +  +  +  M  +     +  +  +  +  +  +  +  +  +  +  +  +|  45        |
                                            __________________________________________________________________________|____________|
   Pituitary Gland                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 |                         X                                                |          2 |
      Pars Distalis, Adenoma               |          X           X     X  X  X  X  X  X  X                    X     X|         24 |
      Pars Distalis, Adenoma, Two          |                   X                                                      |          1 |
      Pars Distalis, Alveolar/Bronchiolar  |                                                                          |            |
          Carcinoma, Metastatic, Lung      |                                                                          |          1 |
      Pars Intermedia, Adenoma             |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Thyroid Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      C-Cell, Adenoma                      |                               X                                          |          4 |
      C-Cell, Carcinoma                    |    X                                                                     |          1 |
      Follicular Cell, Adenoma             |                               X                                          |          1 |
      Follicular Cell, Carcinoma           |                                                                          |          1 |
 _____________________________________________________________________________________________________________________|            |
 GENERAL BODY SYSTEM                       |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Tissue NOS                              |                                           +                              |   3        |
      Alveolar/Bronchiolar Carcinoma,      |                                                                          |            |
          Multiple, Metastatic, Lung       |                                           X                              |          1 |
      Sarcoma, Metastatic, Uncertain       |                                                                          |            |
          Primary Site                     |                                                                          |          1 |
      Squamous Cell Carcinoma, Metastatic, |                                                                          |            |
           Lung                            |                                                                          |          1 |
 _____________________________________________________________________________________________________________________|            |
 GENITAL SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Clitoral Gland                          | +  +  +     M  +  +  +  +  +  +  +  +  +  +  +  +  +     +  +  +  +  +  +|  44        |
                                            __________________________________________________________________________|____________|
   Ovary                                   | +  +  +  +  +  +  +  +  +  +  +     +  +  +  +  +  +  +  +  +  +  +  +  +|  48        |
      Alveolar/Bronchiolar Carcinoma,      |                                                                          |            |
          Metastatic, Lung                 |                X                          X                              |          5 |
      Leukemia                             |                                                                          |          1 |
      Leukemia Mononuclear                 |                                                                X         |          1 |
      Bilateral, Carcinoma, Metastatic,    |                                                                          |            |
           Lung                            |                                                             X            |          1 |
      Bilateral, Sarcoma, Metastatic, Lung |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Uterus                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia                             |                                                                          |          1 |
      Polyp Stromal                        |                               X  X                                       |          5 |
      Sarcoma                              |       X                                                                  |          2 |
 _____________________________________________________________________________________________________________________|            |
 HEMATOPOIETIC 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  16                                                               
NTP Experiment-Test: 05072-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                                         TETRANITROMETHANE                                     Date: 04/16/97  
Route: RESPIRATORY EXPOSURE WHOLE BODY                                                                            Time: 11:46:05  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 7| 6| 6| 7| 6| 6| 7| 7| 7| 5| 7| 7| 7| 7| 6| 5| 5| 7| 5| 7| 6| 4| 7| 6| 7|            |
                             DAY ON TEST   | 2| 8| 4| 2| 9| 6| 2| 1| 2| 6| 2| 2| 2| 2| 9| 6| 8| 2| 3| 2| 9| 7| 2| 6| 2|            |
                                           | 2| 9| 6| 8| 5| 7| 8| 9| 0| 7| 8| 8| 8| 8| 6| 0| 4| 8| 4| 8| 5| 5| 8| 5| 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   | 2| 2| 2| 2| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 5|     A      |
    5 PPM                                  | 6| 7| 8| 9| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0|     L      |
                                           | 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|            |
 __________________________________________________________________________________________________________________________________ 
 HEMATOPOIETIC SYSTEM - cont               |                                                                          |            |
                                           |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Blood                                   |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Bone Marrow                             | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia                             |                                                                          |          1 |
      Leukemia Mononuclear                 |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Lymph Node                              | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Sarcoma, Metastatic, Lung            |                                                                          |          1 |
      Mediastinal, Alveolar/Bronchiolar    |                                                                          |            |
          Carcinoma, Metastatic, Lung      |                                           X                              |          5 |
      Mediastinal, Carcinoma, Metastatic,  |                                                                          |            |
           Lung                            |                                                             X            |          1 |
      Mediastinal, Leukemia Mononuclear    |                                                                          |          1 |
      Pancreatic, Leukemia Mononuclear     |                               X     X                                    |          2 |
      Serosa, Mediastinal, Sarcoma,        |                                                                          |            |
          Metastatic, Uncertain Primary    |                                                                          |            |
          Site                             |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Lymph Node, Mandibular                  | +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
      Leukemia                             |                                                                          |          1 |
      Leukemia Mononuclear                 |                         X                                                |          2 |
                                            __________________________________________________________________________|____________|
   Lymph Node, Mesenteric                  | +  +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
      Leukemia                             |                                                                          |          1 |
      Leukemia Mononuclear                 |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Spleen                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia                             |                                                                          |          1 |
      Leukemia Mononuclear                 |                         X     X     X                          X         |          6 |
      Squamous Cell Carcinoma, Metastatic, |                                                                          |            |
           Lung                            |             X                                                            |          1 |
                                            __________________________________________________________________________|____________|
   Thymus                                  | +  M  +  +  +  +  M  M  +  +  +  +  +  M  +  +  +  +  +  +  M  +  +  +  +|  42        |
      Alveolar/Bronchiolar Carcinoma,      |                                                                          |            |
          Metastatic, Lung                 |                X              X                                          |          4 |
      Leukemia                             |                                                                          |          1 |
      Leukemia Mononuclear                 |                                                                          |          1 |
 _____________________________________________________________________________________________________________________|            |
 INTEGUMENTARY SYSTEM                      |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Mammary Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Adenoma                              |                                                                   X      |          1 |
      Fibroadenoma                         |    X                                                  X                 X|          4 |
      Fibroadenoma, Two                    |                                                                          |          2 |
                                            __________________________________________________________________________|____________|
   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  17                                                               
NTP Experiment-Test: 05072-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                                         TETRANITROMETHANE                                     Date: 04/16/97  
Route: RESPIRATORY EXPOSURE WHOLE BODY                                                                            Time: 11:46:05  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 7| 6| 6| 7| 6| 6| 7| 7| 7| 5| 7| 7| 7| 7| 6| 5| 5| 7| 5| 7| 6| 4| 7| 6| 7|            |
                             DAY ON TEST   | 2| 8| 4| 2| 9| 6| 2| 1| 2| 6| 2| 2| 2| 2| 9| 6| 8| 2| 3| 2| 9| 7| 2| 6| 2|            |
                                           | 2| 9| 6| 8| 5| 7| 8| 9| 0| 7| 8| 8| 8| 8| 6| 0| 4| 8| 4| 8| 5| 5| 8| 5| 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   | 2| 2| 2| 2| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 5|     A      |
    5 PPM                                  | 6| 7| 8| 9| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0|     L      |
                                           | 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|            |
 __________________________________________________________________________________________________________________________________ 
 INTEGUMENTARY SYSTEM - cont               |                                                                          |            |
                                           |                                                                          |            |
      Keratoacanthoma                      |                                                                   X      |          1 |
      Squamous Cell Papilloma              |                                                                          |          1 |
      Subcutaneous Tissue,                 |                                                                          |            |
          Alveolar/Bronchiolar Carcinoma,  |                                                                          |            |
           Metastatic                      | X                                                                        |          1 |
      Subcutaneous Tissue,                 |                                                                          |            |
          Alveolar/Bronchiolar Carcinoma,  |                                                                          |            |
           Metastatic, Lung                |             X                                                            |          1 |
      Subcutaneous Tissue, Fibroma         |                                  X                                       |          1 |
 _____________________________________________________________________________________________________________________|            |
 MUSCULOSKELETAL SYSTEM                    |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Bone                                    | +  +  +  +  +  +  +  +  +  +  +  +     +  +  +  +  +  +  +  +  +  +  +  +|  49        |
 _____________________________________________________________________________________________________________________|            |
 NERVOUS SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Brain                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Astrocytoma Malignant                |                            X                                             |          2 |
                                            __________________________________________________________________________|____________|
   Spinal Cord                             |                                                 +                        |   1        |
 _____________________________________________________________________________________________________________________|            |
 RESPIRATORY SYSTEM                        |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Larynx                                  | +  +  +  +  +     +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
                                            __________________________________________________________________________|____________|
   Lung                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Alveolar/Bronchiolar Adenoma         |                         X  X                                             |          3 |
      Alveolar/Bronchiolar Carcinoma       |                                                                X         |          3 |
      Alveolar/Bronchiolar Carcinoma,      |                                                                          |            |
          Multiple                         | X  X  X  X  X  X  X  X  X  X  X  X  X     X  X  X  X  X  X  X     X  X  X|         44 |
      Alveolar/Bronchiolar Carcinoma, Two  |                                        X                                 |          3 |
      Leukemia                             |                                                                          |          1 |
      Leukemia Mononuclear                 |                         X     X     X                          X         |          5 |
      Mixed Tumor Malignant, Multiple      |                                                                          |          1 |
      Osteosarcoma, Metastatic, Uncertain  |                                                                          |            |
          Primary Site                     |                                                                          |          1 |
      Sarcoma, Multiple                    |                      X                                                   |          1 |
      Squamous Cell Carcinoma              | X                                X  X              X                     |         10 |
      Squamous Cell Carcinoma, Multiple    |             X                                                            |          2 |
      Mediastinum, Carcinoma, Metastatic,  |                                                                          |            |
           Lung                            |                                                             X            |          1 |
      Mediastinum, Leukemia                |                                                                          |          1 |
      Mediastinum, Squamous Cell Carcinoma,|                                                                          |            |
           Metastatic, Lung                |                                                                          |          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: 05072-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                                         TETRANITROMETHANE                                     Date: 04/16/97  
Route: RESPIRATORY EXPOSURE WHOLE BODY                                                                            Time: 11:46:05  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 7| 6| 6| 7| 6| 6| 7| 7| 7| 5| 7| 7| 7| 7| 6| 5| 5| 7| 5| 7| 6| 4| 7| 6| 7|            |
                             DAY ON TEST   | 2| 8| 4| 2| 9| 6| 2| 1| 2| 6| 2| 2| 2| 2| 9| 6| 8| 2| 3| 2| 9| 7| 2| 6| 2|            |
                                           | 2| 9| 6| 8| 5| 7| 8| 9| 0| 7| 8| 8| 8| 8| 6| 0| 4| 8| 4| 8| 5| 5| 8| 5| 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   | 2| 2| 2| 2| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 5|     A      |
    5 PPM                                  | 6| 7| 8| 9| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0|     L      |
                                           | 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|            |
 __________________________________________________________________________________________________________________________________ 
 RESPIRATORY SYSTEM - cont                 |                                                                          |            |
                                           |                                                                          |            |
      Pleura, Mediastinum, Sarcoma,        |                                                                          |            |
          Metastatic, Uncertain Primary    |                                                                          |            |
          Site                             |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Nose                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Trachea                                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
 _____________________________________________________________________________________________________________________|            |
 SPECIAL SENSES SYSTEM                     |                                                                          |            |
                                           |                                                                          |            |
    None                                   |                                                                          |            |
 _____________________________________________________________________________________________________________________|            |
 URINARY SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Kidney                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Alveolar/Bronchiolar Carcinoma,      |                                                                          |            |
          Multiple, Metastatic, Lung       | X                                                                        |          2 |
      Alveolar/Bronchiolar Carcinoma,      |                                                                          |            |
          Metastatic, Lung                 |             X  X                          X                              |          7 |
      Carcinoma, Metastatic, Lung          |                                                             X            |          1 |
      Leukemia                             |                                                                          |          1 |
      Leukemia Mononuclear                 |                                                                          |          1 |
      Osteosarcoma, Metastatic, Uncertain  |                                                                          |            |
          Primary Site                     |                                                                          |          1 |
      Sarcoma, Metastatic, Lung            |                      X                                                   |          2 |
                                            __________________________________________________________________________|____________|
   Urinary Bladder                         | +  +  +  +  +  M  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  M  +|  48        |
      Leukemia                             |                                                                          |          1 |
 __________________________________________________________________________________________________________________________________ 
 SYSTEMIC LESIONS                          |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Multiple Organs                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia                             |                                                                          |          1 |
      Leukemia Mononuclear                 |                         X     X     X                          X         |          6 |
 __________________________________________________________________________________________________________________________________ 
                         * : 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: 05072-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                                         TETRANITROMETHANE                                     Date: 04/16/97  
Route: RESPIRATORY EXPOSURE WHOLE BODY                                                                            Time: 11:46:05  
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 5| 7| 7| 7| 5| 7| 7| 6| 7| 7| 7| 7| 5| 7| 7| 5| 7| 7| 6| 7| 7| 7| 7| 5| 6|             
                             DAY ON TEST   | 8| 1| 2| 2| 5| 2| 2| 1| 2| 0| 2| 2| 8| 2| 2| 6| 2| 2| 8| 2| 2| 2| 2| 4| 3|             
                                           | 4| 6| 7| 7| 9| 7| 7| 9| 7| 6| 8| 8| 7| 8| 8| 3| 8| 8| 1| 9| 9| 9| 9| 5| 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                 | 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|             
                               ANIMAL ID   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 2| 2| 2| 2| 2| 2|             
    2 PPM                                  | 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| 1| 2| 3| 4| 5|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 ALIMENTARY SYSTEM                         |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Esophagus                               | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Large                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Large, Cecum                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  A  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Large, Colon                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Large, Rectum                 | +  +  +  +  +  +  +  +  M  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Small                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Small, Duodenum               | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Small, Ileum                  | M  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Small, Jejunum                | +  +  M  +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Liver                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Hepatocellular Adenoma               |                                                                          |             
      Leukemia Mononuclear                 |    X                 X                             X                 X   |             
                                            __________________________________________________________________________|             
   Mesentery                               |             +        +  +           +        +              +            |             
                                            __________________________________________________________________________|             
   Pancreas                                | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Salivary Glands                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Stomach                                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Stomach, Forestomach                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Stomach, Glandular                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Tongue                                  |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 CARDIOVASCULAR SYSTEM                     |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Heart                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                      X                                               X   |             
 _____________________________________________________________________________________________________________________|             
 ENDOCRINE SYSTEM                          |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Adrenal Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Adrenal Gland, Cortex                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |    X                                                                     |             
                                            __________________________________________________________________________|             
   Adrenal Gland, Medulla                  | +  +  +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                      X   |             
      Pheochromocytoma Benign              |                                                                          |             
      Bilateral, Pheochromocytoma Benign   |                                              X                           |             
                                            __________________________________________________________________________|             
   Islets, Pancreatic                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Parathyroid Gland                       | +  +  +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Pituitary Gland                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |    X                 X                                               X   |             
      Pars Distalis, Adenoma               |             X  X        X  X  X  X  X     X  X     X  X  X  X           X|             
      Pars Distalis, Adenoma, Two          |       X                                                                  |             
      Pars Distalis, Carcinoma             |                                                                          |             
                                            __________________________________________________________________________|             
   Thyroid Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      C-Cell, Adenoma                      |                                  X           X        X     X            |             
      C-Cell, Carcinoma                    |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 GENERAL BODY SYSTEM                       |                                                                          |             
                                           |                                                                          |             
    None                                   |                                                                          |             
 _____________________________________________________________________________________________________________________|             
                                                             Page  20                                                               
NTP Experiment-Test: 05072-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                                         TETRANITROMETHANE                                     Date: 04/16/97  
Route: RESPIRATORY EXPOSURE WHOLE BODY                                                                            Time: 11:46:05  
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 5| 7| 7| 7| 5| 7| 7| 6| 7| 7| 7| 7| 5| 7| 7| 5| 7| 7| 6| 7| 7| 7| 7| 5| 6|             
                             DAY ON TEST   | 8| 1| 2| 2| 5| 2| 2| 1| 2| 0| 2| 2| 8| 2| 2| 6| 2| 2| 8| 2| 2| 2| 2| 4| 3|             
                                           | 4| 6| 7| 7| 9| 7| 7| 9| 7| 6| 8| 8| 7| 8| 8| 3| 8| 8| 1| 9| 9| 9| 9| 5| 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                 | 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|             
                               ANIMAL ID   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 2| 2| 2| 2| 2| 2|             
    2 PPM                                  | 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| 1| 2| 3| 4| 5|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 GENITAL SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Clitoral Gland                          | +  +  M  +  +  +  +  +  +  M  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |             X                                                            |             
      Carcinoma                            |                                                                          |             
                                            __________________________________________________________________________|             
   Ovary                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Uterus                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Deciduoma Benign                     |                                        X                                 |             
      Polyp Stromal                        |                         X  X     X     X                                 |             
      Polyp Stromal, Two                   |                                                                          |             
      Sarcoma Stromal                      | X                                                                        |             
      Bilateral, Polyp Stromal             |                               X                                          |             
                                            __________________________________________________________________________|             
   Vagina                                  |                                                                          |             
      Schwannoma Malignant, Metastatic,    |                                                                          |             
           Urinary Bladder                 |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 HEMATOPOIETIC SYSTEM                      |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Bone Marrow                             | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |    X                                                                 X   |             
                                            __________________________________________________________________________|             
   Lymph Node                              | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Pancreatic, Leukemia Mononuclear     |    X                                                                 X   |             
                                            __________________________________________________________________________|             
   Lymph Node, Mandibular                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Lymph Node, Mesenteric                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |    X                                                                     |             
                                            __________________________________________________________________________|             
   Spleen                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |    X     X           X        X                    X                 X   |             
                                            __________________________________________________________________________|             
   Thymus                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +  +  +  +  M|             
 _____________________________________________________________________________________________________________________|             
 INTEGUMENTARY SYSTEM                      |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Mammary Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenocarcinoma                       |                                                             X            |             
      Fibroadenoma                         |       X  X           X  X                       X  X           X         |             
      Fibroadenoma, Two                    |                                                                          |             
                                            __________________________________________________________________________|             
   Skin                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Basal Cell Adenoma                   |                                                                          |             
      Basosquamous Tumor Malignant         |                                                                          |             
      Squamous Cell Papilloma              |                                              X                           |             
      Subcutaneous Tissue, Fibroma         |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 MUSCULOSKELETAL SYSTEM                    |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Bone                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             
 NERVOUS SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Brain                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             
 RESPIRATORY SYSTEM                        |                                                                          |             
                                           |                                                                          |             
 _____________________________________________________________________________________________________________________|             
                                                             Page  21                                                               
NTP Experiment-Test: 05072-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                                         TETRANITROMETHANE                                     Date: 04/16/97  
Route: RESPIRATORY EXPOSURE WHOLE BODY                                                                            Time: 11:46:05  
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 5| 7| 7| 7| 5| 7| 7| 6| 7| 7| 7| 7| 5| 7| 7| 5| 7| 7| 6| 7| 7| 7| 7| 5| 6|             
                             DAY ON TEST   | 8| 1| 2| 2| 5| 2| 2| 1| 2| 0| 2| 2| 8| 2| 2| 6| 2| 2| 8| 2| 2| 2| 2| 4| 3|             
                                           | 4| 6| 7| 7| 9| 7| 7| 9| 7| 6| 8| 8| 7| 8| 8| 3| 8| 8| 1| 9| 9| 9| 9| 5| 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                 | 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|             
                               ANIMAL ID   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 2| 2| 2| 2| 2| 2|             
    2 PPM                                  | 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| 1| 2| 3| 4| 5|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 RESPIRATORY SYSTEM - cont                 |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Larynx                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Lung                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Alveolar/Bronchiolar Adenoma         |          X                             X                    X            |             
      Alveolar/Bronchiolar Carcinoma       |                X           X              X        X        X            |             
      Alveolar/Bronchiolar Carcinoma,      |                                                                          |             
          Multiple                         |                                                                          |             
      Alveolar/Bronchiolar Carcinoma, Two  |                   X     X     X                                X         |             
      Chordoma, Metastatic, Uncertain      |                                                                          |             
          Primary Site                     |                                                                          |             
      Leukemia Mononuclear                 |    X     X           X                                               X   |             
      Squamous Cell Carcinoma              |                                                                         X|             
                                            __________________________________________________________________________|             
   Nose                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Trachea                                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             
 SPECIAL SENSES SYSTEM                     |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Eye                                     |                                  +           +                           |             
                                            __________________________________________________________________________|             
   Zymbal's Gland                          |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 URINARY SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Kidney                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |    X                                                                     |             
                                            __________________________________________________________________________|             
   Urinary Bladder                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Schwannoma Malignant                 |                                                                          |             
      Transitional Epithelium, Papilloma   |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 SYSTEMIC LESIONS                          |                                                                          |             
                                            __________________________________________________________________________|             
   Multiple Organs                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |    X     X           X        X                    X                 X   |             
 _____________________________________________________________________________________________________________________|             
                                                             Page  22                                                               
NTP Experiment-Test: 05072-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                                         TETRANITROMETHANE                                     Date: 04/16/97  
Route: RESPIRATORY EXPOSURE WHOLE BODY                                                                            Time: 11:46:05  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 7| 7| 7| 5| 6| 7| 7| 7| 7| 4| 7| 7| 6| 7| 6| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7|            |
                             DAY ON TEST   | 2| 2| 2| 7| 0| 2| 2| 2| 0| 2| 2| 2| 8| 2| 1| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2|            |
                                           | 9| 9| 9| 7| 3| 9| 9| 9| 3| 8| 9| 9| 9| 9| 2| 9| 9| 9| 9| 9| 9| 9| 9| 9| 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                 | 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|     T      |
                               ANIMAL ID   | 2| 2| 2| 2| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 5|     A      |
    2 PPM                                  | 6| 7| 8| 9| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0|     L      |
                                           | 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|            |
 __________________________________________________________________________________________________________________________________ 
 ALIMENTARY SYSTEM                         |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Esophagus                               | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Intestine Large                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Intestine Large, Cecum                  | +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  48        |
                                            __________________________________________________________________________|____________|
   Intestine Large, Colon                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  A  +  +  +  +  +  +  +  +  +  +|  49        |
                                            __________________________________________________________________________|____________|
   Intestine Large, Rectum                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
                                            __________________________________________________________________________|____________|
   Intestine Small                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Intestine Small, Duodenum               | +  +  +  +  +  +  +  +  +  +  +  +  +  +  A  +  +  +  +  +  +  +  +  +  +|  49        |
                                            __________________________________________________________________________|____________|
   Intestine Small, Ileum                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
                                            __________________________________________________________________________|____________|
   Intestine Small, Jejunum                | +  +  +  +  +  +  +  +  +  +  +  +  +  +  A  +  +  +  +  +  +  +  +  +  +|  47        |
                                            __________________________________________________________________________|____________|
   Liver                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Hepatocellular Adenoma               |                                                                X         |          1 |
      Leukemia Mononuclear                 |    X                             X                    X     X            |          8 |
                                            __________________________________________________________________________|____________|
   Mesentery                               |                                                                          |   6        |
                                            __________________________________________________________________________|____________|
   Pancreas                                | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Salivary Glands                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Stomach                                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Stomach, Forestomach                    | +  +  +  +  +  +  +  +  +  +  +     +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
                                            __________________________________________________________________________|____________|
   Stomach, Glandular                      | +  +  +  +  +  +  +  +  +  +  +     +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
                                            __________________________________________________________________________|____________|
   Tongue                                  |                                              +                           |   1        |
 _____________________________________________________________________________________________________________________|            |
 CARDIOVASCULAR SYSTEM                     |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Heart                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 |                                                                          |          2 |
 _____________________________________________________________________________________________________________________|            |
 ENDOCRINE SYSTEM                          |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Adrenal Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Adrenal Gland, Cortex                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +     +  +  +  +  +  +  +  +  +  +|  49        |
      Leukemia Mononuclear                 |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Adrenal Gland, Medulla                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +     +  +  +  +  +  +  +  +  +  +|  48        |
      Leukemia Mononuclear                 |                                                                          |          1 |
      Pheochromocytoma Benign              |                      X        X              X                           |          3 |
      Bilateral, Pheochromocytoma Benign   |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Islets, Pancreatic                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Parathyroid Gland                       | +  +  +  +  +  +  +  +  +  +  M  +  +  M  +  +  +  +  +  +  +  +  +  +  +|  47        |
                                            __________________________________________________________________________|____________|
   Pituitary Gland                         | +  +  +  +  +  +  +  I  +  +  +  +  +  +  A  +  +  +  +  +  +  +  +  +  +|  48        |
      Leukemia Mononuclear                 |    X                                                                     |          4 |
      Pars Distalis, Adenoma               |          X  X  X        X     X  X  X  X           X  X     X  X        X|         27 |
      Pars Distalis, Adenoma, Two          |                   X                                                      |          2 |
      Pars Distalis, Carcinoma             |    X                                         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  23                                                               
NTP Experiment-Test: 05072-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                                         TETRANITROMETHANE                                     Date: 04/16/97  
Route: RESPIRATORY EXPOSURE WHOLE BODY                                                                            Time: 11:46:05  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 7| 7| 7| 5| 6| 7| 7| 7| 7| 4| 7| 7| 6| 7| 6| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7|            |
                             DAY ON TEST   | 2| 2| 2| 7| 0| 2| 2| 2| 0| 2| 2| 2| 8| 2| 1| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2|            |
                                           | 9| 9| 9| 7| 3| 9| 9| 9| 3| 8| 9| 9| 9| 9| 2| 9| 9| 9| 9| 9| 9| 9| 9| 9| 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                 | 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|     T      |
                               ANIMAL ID   | 2| 2| 2| 2| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 5|     A      |
    2 PPM                                  | 6| 7| 8| 9| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0|     L      |
                                           | 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|            |
 __________________________________________________________________________________________________________________________________ 
 ENDOCRINE SYSTEM - cont                   |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Thyroid Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      C-Cell, Adenoma                      |                                        X                             X   |          6 |
      C-Cell, Carcinoma                    |    X                                                           X         |          2 |
 _____________________________________________________________________________________________________________________|            |
 GENERAL BODY SYSTEM                       |                                                                          |            |
                                           |                                                                          |            |
    None                                   |                                                                          |            |
 _____________________________________________________________________________________________________________________|            |
 GENITAL SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Clitoral Gland                          | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  48        |
      Adenoma                              |       X           X                                X                     |          4 |
      Carcinoma                            |                               X                                          |          1 |
                                            __________________________________________________________________________|____________|
   Ovary                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Uterus                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Deciduoma Benign                     |                                                                          |          1 |
      Polyp Stromal                        |       X           X        X                 X                           |          8 |
      Polyp Stromal, Two                   |                                                          X               |          1 |
      Sarcoma Stromal                      |                                                                          |          1 |
      Bilateral, Polyp Stromal             |                                                    X              X      |          3 |
                                            __________________________________________________________________________|____________|
   Vagina                                  |                                           +                              |   1        |
      Schwannoma Malignant, Metastatic,    |                                                                          |            |
           Urinary Bladder                 |                                           X                              |          1 |
 _____________________________________________________________________________________________________________________|            |
 HEMATOPOIETIC SYSTEM                      |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Bone Marrow                             | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 |                                                                          |          2 |
                                            __________________________________________________________________________|____________|
   Lymph Node                              | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Pancreatic, Leukemia Mononuclear     |                                                                          |          2 |
                                            __________________________________________________________________________|____________|
   Lymph Node, Mandibular                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Lymph Node, Mesenteric                  | +  +  +  +  +  +  +  +  +     +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
      Leukemia Mononuclear                 |    X                                                  X                  |          3 |
                                            __________________________________________________________________________|____________|
   Spleen                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 |    X                             X                    X     X            |         10 |
                                            __________________________________________________________________________|____________|
   Thymus                                  | M  +  +  +  +  +  +  +  +  +  +     +  +  +  +  +  +  +  +  +  +  +  +  +|  46        |
 _____________________________________________________________________________________________________________________|            |
 INTEGUMENTARY SYSTEM                      |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Mammary Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Adenocarcinoma                       |                                                                          |          1 |
      Fibroadenoma                         |                         X  X        X              X                     |         11 |
      Fibroadenoma, Two                    |                                                 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: 05072-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                                         TETRANITROMETHANE                                     Date: 04/16/97  
Route: RESPIRATORY EXPOSURE WHOLE BODY                                                                            Time: 11:46:05  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 7| 7| 7| 5| 6| 7| 7| 7| 7| 4| 7| 7| 6| 7| 6| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7|            |
                             DAY ON TEST   | 2| 2| 2| 7| 0| 2| 2| 2| 0| 2| 2| 2| 8| 2| 1| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2|            |
                                           | 9| 9| 9| 7| 3| 9| 9| 9| 3| 8| 9| 9| 9| 9| 2| 9| 9| 9| 9| 9| 9| 9| 9| 9| 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                 | 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|     T      |
                               ANIMAL ID   | 2| 2| 2| 2| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 5|     A      |
    2 PPM                                  | 6| 7| 8| 9| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0|     L      |
                                           | 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|            |
 __________________________________________________________________________________________________________________________________ 
 INTEGUMENTARY SYSTEM - cont               |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Skin                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Basal Cell Adenoma                   |                                                                      X   |          1 |
      Basosquamous Tumor Malignant         |                         X                                                |          1 |
      Squamous Cell Papilloma              |                               X                                          |          2 |
      Subcutaneous Tissue, Fibroma         |                                                             X            |          1 |
 _____________________________________________________________________________________________________________________|            |
 MUSCULOSKELETAL SYSTEM                    |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Bone                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
 _____________________________________________________________________________________________________________________|            |
 NERVOUS SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Brain                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
 _____________________________________________________________________________________________________________________|            |
 RESPIRATORY SYSTEM                        |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Larynx                                  | +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
                                            __________________________________________________________________________|____________|
   Lung                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Alveolar/Bronchiolar Adenoma         |                                                    X  X                 X|          6 |
      Alveolar/Bronchiolar Carcinoma       |                   X  X                       X     X     X              X|         11 |
      Alveolar/Bronchiolar Carcinoma,      |                                                                          |            |
          Multiple                         |                         X                                                |          1 |
      Alveolar/Bronchiolar Carcinoma, Two  | X                                X     X                                 |          7 |
      Chordoma, Metastatic, Uncertain      |                                                                          |            |
          Primary Site                     |                   X                                                      |          1 |
      Leukemia Mononuclear                 |                                                       X                  |          5 |
      Squamous Cell Carcinoma              |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Nose                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Trachea                                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
 _____________________________________________________________________________________________________________________|            |
 SPECIAL SENSES SYSTEM                     |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Eye                                     |             +                                                            |   3        |
                                            __________________________________________________________________________|____________|
   Zymbal's Gland                          |          +                                                               |   1        |
 _____________________________________________________________________________________________________________________|            |
 URINARY SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Kidney                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Urinary Bladder                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Schwannoma Malignant                 |                                           X                              |          1 |
      Transitional Epithelium, Papilloma   |                                                          X               |          1 |
 __________________________________________________________________________________________________________________________________ 
 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  25                                                               
NTP Experiment-Test: 05072-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                                         TETRANITROMETHANE                                     Date: 04/16/97  
Route: RESPIRATORY EXPOSURE WHOLE BODY                                                                            Time: 11:46:05  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 7| 7| 7| 5| 6| 7| 7| 7| 7| 4| 7| 7| 6| 7| 6| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7|            |
                             DAY ON TEST   | 2| 2| 2| 7| 0| 2| 2| 2| 0| 2| 2| 2| 8| 2| 1| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2|            |
                                           | 9| 9| 9| 7| 3| 9| 9| 9| 3| 8| 9| 9| 9| 9| 2| 9| 9| 9| 9| 9| 9| 9| 9| 9| 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                 | 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|     T      |
                               ANIMAL ID   | 2| 2| 2| 2| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 5|     A      |
    2 PPM                                  | 6| 7| 8| 9| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0|     L      |
                                           | 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|            |
 __________________________________________________________________________________________________________________________________ 
 SYSTEMIC LESIONS - cont                   |                                                                          |            |
                                           |                                                                          |            |
      Leukemia Mononuclear                 |    X                             X                    X     X            |         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  26                                                               
NTP Experiment-Test: 05072-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                                         TETRANITROMETHANE                                     Date: 04/16/97  
Route: RESPIRATORY EXPOSURE WHOLE BODY                                                                            Time: 11:46:05  
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 7| 5| 4| 6| 2| 6| 7| 6| 7| 7| 6| 7| 6| 7| 7| 7| 5| 7| 7| 7| 7| 6| 6| 7| 6|             
                             DAY ON TEST   | 2| 6| 2| 5| 9| 4| 2| 4| 0| 2| 4| 2| 8| 0| 2| 2| 4| 2| 2| 2| 2| 1| 4| 2| 1|             
                                           | 7| 3| 2| 8| 4| 4| 4| 6| 7| 7| 9| 7| 6| 8| 3| 7| 5| 7| 7| 8| 8| 8| 4| 3| 8|             
 _____________________________________________________________________________________________________________________|             
                                           | 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| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 7|             
    CONTROL                                | 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| 1| 2| 3| 4| 5|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 ALIMENTARY SYSTEM                         |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Esophagus                               | +  +  +  +  M  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Large                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Large, Cecum                  | +  +  M  +  A  +  A  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                          |             
      Lymphoma Malignant                   |                                                                          |             
      Mesothelioma Malignant               |                                                                         X|             
                                            __________________________________________________________________________|             
   Intestine Large, Colon                  | +  +  +  +  A  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Lymphoma Malignant                   |                                                                          |             
                                            __________________________________________________________________________|             
   Intestine Large, Rectum                 | +  +  M  +  A  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Small                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Small, Duodenum               | +  +  +  +  A  +  +  +  +  +  +  +  +  +  +     +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Small, Ileum                  | +  +  +  +  A  +  A  +  +  +  +  +  A  +  +     +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Intestine Small, Jejunum                | +  +  +  +  A  +  A  +  +  +  +  +  +  +  +     +  +  +  +  +  +  +  +  +|             
      Adenocarcinoma                       |                                                                          |             
      Leiomyosarcoma                       | X                                                                        |             
                                            __________________________________________________________________________|             
   Liver                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenocarcinoma, Multiple, Metastatic,|                                                                          |             
           Intestine Small                 |                                                                          |             
      Hepatocellular Carcinoma             |                                        X                                 |             
      Leukemia Mononuclear                 | X  X  X        X     X     X  X  X        X     X  X  X     X  X        X|             
      Lymphoma Malignant                   |                                                                          |             
                                            __________________________________________________________________________|             
   Mesentery                               |                                                                         +|             
      Hemangioma                           |                                                                          |             
      Leukemia Mononuclear                 |                                                                          |             
      Mesothelioma Malignant               |                                                                         X|             
                                            __________________________________________________________________________|             
   Pancreas                                | +  +  +  +  A  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                          |             
      Lymphoma Malignant                   |                                                                          |             
      Mesothelioma Malignant               |                                                                         X|             
                                            __________________________________________________________________________|             
   Salivary Glands                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Stomach                                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Stomach, Forestomach                    | +  +  +  +  A  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Mesothelioma Malignant               |                                                                         X|             
                                            __________________________________________________________________________|             
   Stomach, Glandular                      | +  +  +  +  A  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Tongue                                  |                         +                          +                     |             
      Squamous Cell Carcinoma              |                         X                                                |             
                                            __________________________________________________________________________|             
   Tooth                                   |                                     +                                    |             
 _____________________________________________________________________________________________________________________|             
 CARDIOVASCULAR SYSTEM                     |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Blood Vessel                            |                                                             +            |             
                                            __________________________________________________________________________|             
   Heart                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |    X                 X                          X                        |             
 _____________________________________________________________________________________________________________________|             
 ENDOCRINE SYSTEM                          |                                                                          |             
 _____________________________________________________________________________________________________________________|             
                                                             Page  27                                                               
NTP Experiment-Test: 05072-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                                         TETRANITROMETHANE                                     Date: 04/16/97  
Route: RESPIRATORY EXPOSURE WHOLE BODY                                                                            Time: 11:46:05  
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 7| 5| 4| 6| 2| 6| 7| 6| 7| 7| 6| 7| 6| 7| 7| 7| 5| 7| 7| 7| 7| 6| 6| 7| 6|             
                             DAY ON TEST   | 2| 6| 2| 5| 9| 4| 2| 4| 0| 2| 4| 2| 8| 0| 2| 2| 4| 2| 2| 2| 2| 1| 4| 2| 1|             
                                           | 7| 3| 2| 8| 4| 4| 4| 6| 7| 7| 9| 7| 6| 8| 3| 7| 5| 7| 7| 8| 8| 8| 4| 3| 8|             
 _____________________________________________________________________________________________________________________|             
                                           | 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| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 7|             
    CONTROL                                | 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| 1| 2| 3| 4| 5|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 ENDOCRINE SYSTEM - cont                   |                                                                          |             
                                           |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Adrenal Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Adrenal Gland, Cortex                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |                                                                         X|             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Adrenal Gland, Medulla                  | +  M  M  +  +  +  +  +  +  +  M  +  M  +  +  +  +  +  +  +  +  +  +  +  +|             
      Pheochromocytoma Malignant           |                                                                          |             
      Pheochromocytoma Benign              |                X                             X        X              X   |             
                                            __________________________________________________________________________|             
   Islets, Pancreatic                      | +  +  +  +  A  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              | X                                                                        |             
      Carcinoma                            |                   X           X                                          |             
      Carcinoma, Two                       |                                                                          |             
                                            __________________________________________________________________________|             
   Parathyroid Gland                       | +  +  +  +  M  +  +  +  M  +  M  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Pituitary Gland                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |       X                                         X                        |             
      Pars Distalis, Adenoma               | X     X                 X  X     X     X     X           X     X  X  X  X|             
      Pars Distalis, Adenoma, Two          |          X           X                                                   |             
      Pars Intermedia, Adenoma             |                                                                      X   |             
                                            __________________________________________________________________________|             
   Thyroid Gland                           | +  +  +  +  +  +  +  +  +  +  +     +  +  +  +  +  +  +  +  +  +  +  +  +|             
      C-Cell, Adenoma                      |                                                       X        X         |             
      Follicular Cell, Carcinoma           |                                                                   X      |             
 _____________________________________________________________________________________________________________________|             
 GENERAL BODY SYSTEM                       |                                                                          |             
                                           |                                                                          |             
    None                                   |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 GENITAL SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Coagulating Gland                       |                                        +                                 |             
                                            __________________________________________________________________________|             
   Epididymis                              | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Mesothelioma Malignant               |          X                                                              X|             
      Bilateral, Mesothelioma Malignant    |                                              X                           |             
                                            __________________________________________________________________________|             
   Preputial Gland                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Carcinoma                            |          X                                               X               |             
                                            __________________________________________________________________________|             
   Prostate                                | +  +  +  +  +  +  +  +  +  +  +  +  +     +  +  +  +  +  +  +  +  +  +  +|             
      Adenocarcinoma                       |                                                          X               |             
                                            __________________________________________________________________________|             
   Seminal Vesicle                         | +  +  M  +  M  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Testes                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Mesothelioma Malignant               |          X                                                              X|             
      Bilateral, Mesothelioma Malignant    |                                              X                           |             
      Bilateral, Interstitial Cell, Adenoma|                   X        X  X              X     X  X  X  X  X     X   |             
      Interstitial Cell, Adenoma           | X  X                 X           X     X  X                             X|             
 _____________________________________________________________________________________________________________________|             
 HEMATOPOIETIC SYSTEM                      |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Bone Marrow                             | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |    X           X                 X        X                              |             
 _____________________________________________________________________________________________________________________|             
                                                             Page  28                                                               
NTP Experiment-Test: 05072-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                                         TETRANITROMETHANE                                     Date: 04/16/97  
Route: RESPIRATORY EXPOSURE WHOLE BODY                                                                            Time: 11:46:05  
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 7| 5| 4| 6| 2| 6| 7| 6| 7| 7| 6| 7| 6| 7| 7| 7| 5| 7| 7| 7| 7| 6| 6| 7| 6|             
                             DAY ON TEST   | 2| 6| 2| 5| 9| 4| 2| 4| 0| 2| 4| 2| 8| 0| 2| 2| 4| 2| 2| 2| 2| 1| 4| 2| 1|             
                                           | 7| 3| 2| 8| 4| 4| 4| 6| 7| 7| 9| 7| 6| 8| 3| 7| 5| 7| 7| 8| 8| 8| 4| 3| 8|             
 _____________________________________________________________________________________________________________________|             
                                           | 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| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 7|             
    CONTROL                                | 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| 1| 2| 3| 4| 5|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 HEMATOPOIETIC SYSTEM - cont               |                                                                          |             
                                           |                                                                          |             
      Lymphoma Malignant                   |                                                                          |             
                                            __________________________________________________________________________|             
   Lymph Node                              | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Mediastinal, Leukemia Mononuclear    | X  X           X                          X                    X         |             
      Mediastinal, Lymphoma Malignant      |                                                                          |             
      Pancreatic, Leukemia Mononuclear     |                X                          X  X                           |             
      Pancreatic, Lymphoma Malignant       |                                                                          |             
                                            __________________________________________________________________________|             
   Lymph Node, Mandibular                  | +  +  +  +  M  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |       X        X                 X        X  X  X                       X|             
      Lymphoma Malignant                   |                                                                          |             
                                            __________________________________________________________________________|             
   Lymph Node, Mesenteric                  | +  +  +  +  +  +  +  +  M  +  +  +  M  +  +  M  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |    X  X        X                 X        X     X                        |             
      Lymphoma Malignant                   |                                                                          |             
                                            __________________________________________________________________________|             
   Spleen                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X  X  X        X     X     X  X  X        X     X  X  X     X  X        X|             
      Lymphoma Malignant                   |                                                                          |             
      Mesothelioma Malignant               |                                                                         X|             
                                            __________________________________________________________________________|             
   Thymus                                  | +  +  M  +  A  +  +  +  M  M  +  M  M  +  +  M  +  M  +  +  +  +  +  M  +|             
      Leukemia Mononuclear                 |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 INTEGUMENTARY SYSTEM                      |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Mammary Gland                           | +  M  +  +  M  +  +  +  +  +  M  +  +  M  M  +  M  +  +  +  +  +  +  M  +|             
      Fibroadenoma                         |                                                                          |             
                                            __________________________________________________________________________|             
   Skin                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Basal Cell Adenoma                   |          X                                                               |             
      Basal Cell Carcinoma                 |                                                                          |             
      Keratoacanthoma                      |                                                                X         |             
      Subcutaneous Tissue, Fibroma         |                         X                             X                  |             
 _____________________________________________________________________________________________________________________|             
 MUSCULOSKELETAL SYSTEM                    |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Bone                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Skeletal Muscle                         |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 NERVOUS SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Brain                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                 X                        |             
 _____________________________________________________________________________________________________________________|             
 RESPIRATORY SYSTEM                        |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Larynx                                  | +  +  M  +  M  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Lung                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Alveolar/Bronchiolar Adenoma         |                                                                          |             
      Leukemia Mononuclear                 | X  X  X        X     X        X  X        X  X  X  X        X  X         |             
      Lymphoma Malignant                   |                                                                          |             
      Pheochromocytoma Malignant,          |                                                                          |             
          Metastatic, Adrenal Gland        |                                                                          |             
 _____________________________________________________________________________________________________________________|             
                                                             Page  29                                                               
NTP Experiment-Test: 05072-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                                         TETRANITROMETHANE                                     Date: 04/16/97  
Route: RESPIRATORY EXPOSURE WHOLE BODY                                                                            Time: 11:46:05  
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 7| 5| 4| 6| 2| 6| 7| 6| 7| 7| 6| 7| 6| 7| 7| 7| 5| 7| 7| 7| 7| 6| 6| 7| 6|             
                             DAY ON TEST   | 2| 6| 2| 5| 9| 4| 2| 4| 0| 2| 4| 2| 8| 0| 2| 2| 4| 2| 2| 2| 2| 1| 4| 2| 1|             
                                           | 7| 3| 2| 8| 4| 4| 4| 6| 7| 7| 9| 7| 6| 8| 3| 7| 5| 7| 7| 8| 8| 8| 4| 3| 8|             
 _____________________________________________________________________________________________________________________|             
                                           | 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| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 7|             
    CONTROL                                | 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| 1| 2| 3| 4| 5|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 RESPIRATORY SYSTEM - cont                 |                                                                          |             
                                           |                                                                          |             
      Mediastinum, Leukemia Mononuclear    |                                                                X         |             
                                            __________________________________________________________________________|             
   Nose                                    | +  +  +  +  A  +  +  M  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Trachea                                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             
 SPECIAL SENSES SYSTEM                     |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Eye                                     |       +                                                                  |             
                                            __________________________________________________________________________|             
   Zymbal's Gland                          |                                                                   +      |             
      Carcinoma                            |                                                                   X      |             
 _____________________________________________________________________________________________________________________|             
 URINARY SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Kidney                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                          |             
      Lymphoma Malignant                   |                                                                          |             
                                            __________________________________________________________________________|             
   Ureter                                  |                                                          +               |             
                                            __________________________________________________________________________|             
   Urinary Bladder                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +     +  +  +  +  +|             
      Mesothelioma Malignant               |                                                                         X|             
 _____________________________________________________________________________________________________________________|             
 SYSTEMIC LESIONS                          |                                                                          |             
                                            __________________________________________________________________________|             
   Multiple Organs                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X  X  X        X     X     X  X  X        X  X  X  X  X     X  X        X|             
      Lymphoma Malignant                   |                                                                          |             
      Mesothelioma Malignant               |          X                                   X                          X|             
 _____________________________________________________________________________________________________________________|             
                                                             Page  30                                                               
NTP Experiment-Test: 05072-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                                         TETRANITROMETHANE                                     Date: 04/16/97  
Route: RESPIRATORY EXPOSURE WHOLE BODY                                                                            Time: 11:46:05  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 7| 6| 7| 7| 7| 4| 6| 6| 6| 7| 5| 6| 7| 5| 7| 4| 6| 6| 6| 7| 6| 4| 7| 7| 7|            |
                             DAY ON TEST   | 2| 6| 2| 2| 2| 0| 4| 4| 6| 2| 4| 6| 2| 6| 2| 9| 7| 9| 0| 2| 5| 8| 2| 2| 2|            |
                                           | 8| 8| 8| 8| 9| 1| 4| 6| 1| 9| 6| 0| 7| 9| 7| 2| 1| 4| 4| 7| 3| 3| 0| 7| 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 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| 1|     T      |
                               ANIMAL ID   | 7| 7| 7| 7| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 0|     A      |
    CONTROL                                | 6| 7| 8| 9| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0|     L      |
                                           | 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|            |
 __________________________________________________________________________________________________________________________________ 
 ALIMENTARY SYSTEM                         |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Esophagus                               | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
                                            __________________________________________________________________________|____________|
   Intestine Large                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Intestine Large, Cecum                  | +  +  +  +  +  M  +  +  +  +  +     +  +  +  +  +  +  +  +  +  +  +  +  +|  45        |
      Leukemia Mononuclear                 |                                        X                                 |          1 |
      Lymphoma Malignant                   |                      X                                                   |          1 |
      Mesothelioma Malignant               |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Intestine Large, Colon                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
      Lymphoma Malignant                   |                      X                                                   |          1 |
                                            __________________________________________________________________________|____________|
   Intestine Large, Rectum                 | +  +  +  +  +  M  +  +     +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  46        |
                                            __________________________________________________________________________|____________|
   Intestine Small                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Intestine Small, Duodenum               | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  48        |
                                            __________________________________________________________________________|____________|
   Intestine Small, Ileum                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  46        |
      Leukemia Mononuclear                 |                                        X                                 |          1 |
                                            __________________________________________________________________________|____________|
   Intestine Small, Jejunum                | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  47        |
      Adenocarcinoma                       |                                  X                                       |          1 |
      Leiomyosarcoma                       |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Liver                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Adenocarcinoma, Multiple, Metastatic,|                                                                          |            |
           Intestine Small                 |                                  X                                       |          1 |
      Hepatocellular Carcinoma             |                                                                          |          1 |
      Leukemia Mononuclear                 | X     X                 X        X     X  X  X              X  X         |         24 |
      Lymphoma Malignant                   |                      X                                                   |          1 |
                                            __________________________________________________________________________|____________|
   Mesentery                               |                         +     +           +                              |   4        |
      Hemangioma                           |                         X                                                |          1 |
      Leukemia Mononuclear                 |                                           X                              |          1 |
      Mesothelioma Malignant               |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Pancreas                                | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
      Leukemia Mononuclear                 |                                        X     X                           |          2 |
      Lymphoma Malignant                   |                      X                                                   |          1 |
      Mesothelioma Malignant               |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Salivary Glands                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Stomach                                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Stomach, Forestomach                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
      Mesothelioma Malignant               |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Stomach, Glandular                      | +  +  +  +  +  +  +  +  +  +  +     +  +  +  +  +  +  +  +  +  +  +  +  +|  48        |
                                            __________________________________________________________________________|____________|
   Tongue                                  |                                                                          |   2        |
      Squamous Cell Carcinoma              |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Tooth                                   |                                                                          |   1        |
 _____________________________________________________________________________________________________________________|            |
 CARDIOVASCULAR 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  31                                                               
NTP Experiment-Test: 05072-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                                         TETRANITROMETHANE                                     Date: 04/16/97  
Route: RESPIRATORY EXPOSURE WHOLE BODY                                                                            Time: 11:46:05  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 7| 6| 7| 7| 7| 4| 6| 6| 6| 7| 5| 6| 7| 5| 7| 4| 6| 6| 6| 7| 6| 4| 7| 7| 7|            |
                             DAY ON TEST   | 2| 6| 2| 2| 2| 0| 4| 4| 6| 2| 4| 6| 2| 6| 2| 9| 7| 9| 0| 2| 5| 8| 2| 2| 2|            |
                                           | 8| 8| 8| 8| 9| 1| 4| 6| 1| 9| 6| 0| 7| 9| 7| 2| 1| 4| 4| 7| 3| 3| 0| 7| 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 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| 1|     T      |
                               ANIMAL ID   | 7| 7| 7| 7| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 0|     A      |
    CONTROL                                | 6| 7| 8| 9| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0|     L      |
                                           | 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|            |
 __________________________________________________________________________________________________________________________________ 
 CARDIOVASCULAR SYSTEM - cont              |                                                                          |            |
                                           |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Blood Vessel                            |                                  +                                       |   2        |
                                            __________________________________________________________________________|____________|
   Heart                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 |                                        X                    X  X         |          6 |
 _____________________________________________________________________________________________________________________|            |
 ENDOCRINE SYSTEM                          |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Adrenal Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Adrenal Gland, Cortex                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Adenoma                              |                                                                          |          1 |
      Leukemia Mononuclear                 |                                        X                    X            |          2 |
                                            __________________________________________________________________________|____________|
   Adrenal Gland, Medulla                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  46        |
      Pheochromocytoma Malignant           |                                           X                              |          1 |
      Pheochromocytoma Benign              |    X     X  X           X        X                       X     X     X   |         12 |
                                            __________________________________________________________________________|____________|
   Islets, Pancreatic                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
      Adenoma                              |                                        X                             X   |          3 |
      Carcinoma                            |                            X  X                                          |          4 |
      Carcinoma, Two                       |                                                 X                        |          1 |
                                            __________________________________________________________________________|____________|
   Parathyroid Gland                       | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  47        |
                                            __________________________________________________________________________|____________|
   Pituitary Gland                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +  +  +  +|  49        |
      Leukemia Mononuclear                 |                                                             X            |          3 |
      Pars Distalis, Adenoma               |    X  X  X        X     X  X  X        X  X     X  X  X     X     X  X   |         27 |
      Pars Distalis, Adenoma, Two          |                                                                          |          2 |
      Pars Intermedia, Adenoma             |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Thyroid Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
      C-Cell, Adenoma                      |                   X                                                      |          3 |
      Follicular Cell, Carcinoma           |                                                                          |          1 |
 _____________________________________________________________________________________________________________________|            |
 GENERAL BODY SYSTEM                       |                                                                          |            |
                                           |                                                                          |            |
    None                                   |                                                                          |            |
 _____________________________________________________________________________________________________________________|            |
 GENITAL SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Coagulating Gland                       |                                                                          |   1        |
                                            __________________________________________________________________________|____________|
   Epididymis                              | +  +  +  +  +  +  +  +     +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
      Mesothelioma Malignant               |                                                                          |          2 |
      Bilateral, Mesothelioma Malignant    |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Preputial Gland                         | +  +  +  M  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
      Carcinoma                            |             X                                                            |          3 |
                                            __________________________________________________________________________|____________|
   Prostate                                | +  +  +  +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +  +  +  +  +  +|  48        |
      Adenocarcinoma                       |                                                                          |          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  32                                                               
NTP Experiment-Test: 05072-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                                         TETRANITROMETHANE                                     Date: 04/16/97  
Route: RESPIRATORY EXPOSURE WHOLE BODY                                                                            Time: 11:46:05  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 7| 6| 7| 7| 7| 4| 6| 6| 6| 7| 5| 6| 7| 5| 7| 4| 6| 6| 6| 7| 6| 4| 7| 7| 7|            |
                             DAY ON TEST   | 2| 6| 2| 2| 2| 0| 4| 4| 6| 2| 4| 6| 2| 6| 2| 9| 7| 9| 0| 2| 5| 8| 2| 2| 2|            |
                                           | 8| 8| 8| 8| 9| 1| 4| 6| 1| 9| 6| 0| 7| 9| 7| 2| 1| 4| 4| 7| 3| 3| 0| 7| 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 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| 1|     T      |
                               ANIMAL ID   | 7| 7| 7| 7| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 0|     A      |
    CONTROL                                | 6| 7| 8| 9| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0|     L      |
                                           | 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|            |
 __________________________________________________________________________________________________________________________________ 
 GENITAL SYSTEM - cont                     |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Seminal Vesicle                         | +  +  +  +  +  M  +  +     +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  46        |
                                            __________________________________________________________________________|____________|
   Testes                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Mesothelioma Malignant               |                                                                          |          2 |
      Bilateral, Mesothelioma Malignant    |                                                                          |          1 |
      Bilateral, Interstitial Cell, Adenoma| X     X     X        X           X  X                 X              X  X|         19 |
      Interstitial Cell, Adenoma           |          X                 X              X  X              X  X  X      |         14 |
 _____________________________________________________________________________________________________________________|            |
 HEMATOPOIETIC SYSTEM                      |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Bone Marrow                             | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 |       X                                X     X              X  X         |          9 |
      Lymphoma Malignant                   |                      X                                                   |          1 |
                                            __________________________________________________________________________|____________|
   Lymph Node                              | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Mediastinal, Leukemia Mononuclear    | X                       X              X     X              X  X         |         11 |
      Mediastinal, Lymphoma Malignant      |                      X                                                   |          1 |
      Pancreatic, Leukemia Mononuclear     |       X                 X              X     X                           |          7 |
      Pancreatic, Lymphoma Malignant       |                      X                                                   |          1 |
                                            __________________________________________________________________________|____________|
   Lymph Node, Mandibular                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +  +  +  +|  48        |
      Leukemia Mononuclear                 | X     X                                X                    X  X         |         12 |
      Lymphoma Malignant                   |                      X                                                   |          1 |
                                            __________________________________________________________________________|____________|
   Lymph Node, Mesenteric                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  47        |
      Leukemia Mononuclear                 |       X                                X  X  X              X  X         |         12 |
      Lymphoma Malignant                   |                      X                                                   |          1 |
                                            __________________________________________________________________________|____________|
   Spleen                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 | X     X                 X        X  X  X  X  X     X        X  X         |         26 |
      Lymphoma Malignant                   |                      X                                                   |          1 |
      Mesothelioma Malignant               |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Thymus                                  | +  +  M  +  +  M  +  +  +  M  +  +  +  +  +  +  +  +  +  +  +  M  +  +   |  36        |
      Leukemia Mononuclear                 |                                                             X            |          1 |
 _____________________________________________________________________________________________________________________|            |
 INTEGUMENTARY SYSTEM                      |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Mammary Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  43        |
      Fibroadenoma                         |                                                    X                     |          1 |
                                            __________________________________________________________________________|____________|
   Skin                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Basal Cell Adenoma                   |                                                                          |          1 |
      Basal Cell Carcinoma                 |                                                             X            |          1 |
      Keratoacanthoma                      |                   X                                                      |          2 |
      Subcutaneous Tissue, Fibroma         |                X                          X                              |          4 |
 _____________________________________________________________________________________________________________________|            |
 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  33                                                               
NTP Experiment-Test: 05072-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                                         TETRANITROMETHANE                                     Date: 04/16/97  
Route: RESPIRATORY EXPOSURE WHOLE BODY                                                                            Time: 11:46:05  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 7| 6| 7| 7| 7| 4| 6| 6| 6| 7| 5| 6| 7| 5| 7| 4| 6| 6| 6| 7| 6| 4| 7| 7| 7|            |
                             DAY ON TEST   | 2| 6| 2| 2| 2| 0| 4| 4| 6| 2| 4| 6| 2| 6| 2| 9| 7| 9| 0| 2| 5| 8| 2| 2| 2|            |
                                           | 8| 8| 8| 8| 9| 1| 4| 6| 1| 9| 6| 0| 7| 9| 7| 2| 1| 4| 4| 7| 3| 3| 0| 7| 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 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| 1|     T      |
                               ANIMAL ID   | 7| 7| 7| 7| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 0|     A      |
    CONTROL                                | 6| 7| 8| 9| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0|     L      |
                                           | 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|            |
 __________________________________________________________________________________________________________________________________ 
 MUSCULOSKELETAL SYSTEM - cont             |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Bone                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Skeletal Muscle                         |                               +                                          |   1        |
 _____________________________________________________________________________________________________________________|            |
 NERVOUS SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Brain                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 |                                                                          |          1 |
 _____________________________________________________________________________________________________________________|            |
 RESPIRATORY SYSTEM                        |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Larynx                                  | +  +  +  +  +  M  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  47        |
                                            __________________________________________________________________________|____________|
   Lung                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Alveolar/Bronchiolar Adenoma         |                                                                      X   |          1 |
      Leukemia Mononuclear                 | X     X                 X        X  X  X  X  X              X  X         |         23 |
      Lymphoma Malignant                   |                      X                                                   |          1 |
      Pheochromocytoma Malignant,          |                                                                          |            |
          Metastatic, Adrenal Gland        |                                           X                              |          1 |
      Mediastinum, Leukemia Mononuclear    |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Nose                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  48        |
                                            __________________________________________________________________________|____________|
   Trachea                                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
 _____________________________________________________________________________________________________________________|            |
 SPECIAL SENSES SYSTEM                     |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Eye                                     |                                                                          |   1        |
                                            __________________________________________________________________________|____________|
   Zymbal's Gland                          |                                                                          |   1        |
      Carcinoma                            |                                                                          |          1 |
 _____________________________________________________________________________________________________________________|            |
 URINARY SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Kidney                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 |                                              X                           |          1 |
      Lymphoma Malignant                   |                      X                                                   |          1 |
                                            __________________________________________________________________________|____________|
   Ureter                                  |                                                                          |   1        |
                                            __________________________________________________________________________|____________|
   Urinary Bladder                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
      Mesothelioma Malignant               |                                                                          |          1 |
 __________________________________________________________________________________________________________________________________ 
 SYSTEMIC LESIONS                          |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Multiple Organs                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 | X     X                 X        X  X  X  X  X     X        X  X         |         27 |
      Lymphoma Malignant                   |                      X                                                   |          1 |
      Mesothelioma Malignant               |                                                                          |          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  34                                                               
NTP Experiment-Test: 05072-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                                         TETRANITROMETHANE                                     Date: 04/16/97  
Route: RESPIRATORY EXPOSURE WHOLE BODY                                                                            Time: 11:46:05  
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 6| 7| 5| 7| 6| 5| 6| 5| 5| 6| 5| 7| 6| 5| 5| 5| 6| 5| 6| 6| 7| 5| 5| 5| 6|             
                             DAY ON TEST   | 2| 2| 4| 0| 5| 0| 7| 4| 9| 0| 7| 2| 5| 0| 4| 6| 8| 1| 3| 9| 2| 4| 4| 4| 0|             
                                           | 9| 8| 9| 8| 7| 0| 4| 7| 0| 9| 3| 8| 9| 6| 1| 2| 5| 3| 2| 4| 3| 6| 7| 8| 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                   | 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| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 7|             
    5 PPM                                  | 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| 1| 2| 3| 4| 5|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 ALIMENTARY SYSTEM                         |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Esophagus                               | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Large                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Large, Cecum                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  A  +  +  +  +  +  +  +  +|             
      Mesothelioma Malignant               |                                                                      X   |             
                                            __________________________________________________________________________|             
   Intestine Large, Colon                  | +  +  +  A  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Mesothelioma Malignant               |                                                                      X   |             
                                            __________________________________________________________________________|             
   Intestine Large, Rectum                 | +  +  +  M  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Mesothelioma Malignant               |                                                                      X   |             
                                            __________________________________________________________________________|             
   Intestine Small                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Small, Duodenum               | +  +  +  A  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Mesothelioma Malignant               |                                                                      X   |             
                                            __________________________________________________________________________|             
   Intestine Small, Ileum                  | +  M  +  A  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Mesothelioma Malignant               |                                                                      X   |             
                                            __________________________________________________________________________|             
   Intestine Small, Jejunum                | +  +  +  +  +  +  +  +  +  A  +  +  +  +  +  +  M  +  +  +  +  +  +  +  +|             
      Mesothelioma Malignant               |                                                                      X   |             
      Polyp Adenomatous                    |                                                    X                     |             
                                            __________________________________________________________________________|             
   Liver                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |       X                       X     X     X                    X        X|             
                                            __________________________________________________________________________|             
   Mesentery                               |       +     +                                                     +  +   |             
      Leukemia Mononuclear                 |       X                                                                  |             
      Mesothelioma Malignant               |                                                                      X   |             
                                            __________________________________________________________________________|             
   Pancreas                                | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Alveolar/Bronchiolar Carcinoma,      |                                                                          |             
          Metastatic, Lung                 |                                                    X                     |             
      Leukemia Mononuclear                 |                                                                          |             
      Mesothelioma Malignant               |                                                                      X   |             
      Acinus, Adenoma                      |                                        X                                 |             
                                            __________________________________________________________________________|             
   Salivary Glands                         | +  +  +  +  +  +  +     +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Stomach                                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Stomach, Forestomach                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |       X                                                                  |             
                                            __________________________________________________________________________|             
   Stomach, Glandular                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             
 CARDIOVASCULAR SYSTEM                     |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Blood Vessel                            |                                                                          |             
      Aorta, Adventitia,                   |                                                                          |             
          Alveolar/Bronchiolar Carcinoma,  |                                                                          |             
           Metastatic, Lung                |                                                                          |             
                                            __________________________________________________________________________|             
   Heart                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Alveolar/Bronchiolar Carcinoma,      |                                                                          |             
          Metastatic, Lung                 | X        X                                                  X            |             
      Leukemia Mononuclear                 |       X                             X                                    |             
      Squamous Cell Carcinoma, Metastatic, |                                                                          |             
           Lung                            |                                                                   X      |             
 _____________________________________________________________________________________________________________________|             
                                                             Page  35                                                               
NTP Experiment-Test: 05072-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                                         TETRANITROMETHANE                                     Date: 04/16/97  
Route: RESPIRATORY EXPOSURE WHOLE BODY                                                                            Time: 11:46:05  
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 6| 7| 5| 7| 6| 5| 6| 5| 5| 6| 5| 7| 6| 5| 5| 5| 6| 5| 6| 6| 7| 5| 5| 5| 6|             
                             DAY ON TEST   | 2| 2| 4| 0| 5| 0| 7| 4| 9| 0| 7| 2| 5| 0| 4| 6| 8| 1| 3| 9| 2| 4| 4| 4| 0|             
                                           | 9| 8| 9| 8| 7| 0| 4| 7| 0| 9| 3| 8| 9| 6| 1| 2| 5| 3| 2| 4| 3| 6| 7| 8| 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                   | 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| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 7|             
    5 PPM                                  | 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| 1| 2| 3| 4| 5|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 CARDIOVASCULAR SYSTEM - cont              |                                                                          |             
                                           |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 ENDOCRINE SYSTEM                          |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Adrenal Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Capsule, Alveolar/Bronchiolar        |                                                                          |             
          Carcinoma, Metastatic, Lung      |                                                                          |             
                                            __________________________________________________________________________|             
   Adrenal Gland, Cortex                   | +  +  +  +  +  +  +  +     +  +  +  +  +  +  +  +  +  +  +  +  +  +  +   |             
      Alveolar/Bronchiolar Carcinoma,      |                                                                          |             
          Metastatic, Lung                 |                                                                          |             
      Leukemia Mononuclear                 |                                     X                                    |             
      Mesothelioma Malignant               |                                                                      X   |             
      Medulla, Alveolar/Bronchiolar        |                                                                          |             
          Carcinoma, Metastatic, Lung      |                                        X                                 |             
                                            __________________________________________________________________________|             
   Adrenal Gland, Medulla                  | +  M  +  +  +  +  +  +  +  +  +  +  +     +  +  +  +  +  +  +  +  +  +   |             
      Alveolar/Bronchiolar Carcinoma,      |                                                                          |             
          Metastatic, Lung                 |                            X                                             |             
      Leukemia Mononuclear                 |                                     X                                    |             
      Neuroblastoma Benign                 |                                           X                              |             
      Pheochromocytoma Malignant           |                                                                          |             
      Pheochromocytoma Benign              |                   X                 X           X                        |             
      Pheochromocytoma Benign, Multiple    |                                  X                                       |             
                                            __________________________________________________________________________|             
   Islets, Pancreatic                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |                                  X                                       |             
      Alveolar/Bronchiolar Carcinoma,      |                                                                          |             
          Metastatic, Lung                 |                                                 X                        |             
      Carcinoma                            |                X                    X                                    |             
                                            __________________________________________________________________________|             
   Parathyroid Gland                       | +  +  M  +  +  M  +  +  +  M  +  M  +  +  M  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Pituitary Gland                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |       X                                                                  |             
      Pars Distalis, Adenoma               |       X              X        X                 X        X           X   |             
      Pars Distalis, Adenoma, Two          |                   X                                                      |             
                                            __________________________________________________________________________|             
   Thyroid Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |       X                                                                  |             
      C-Cell, Adenoma                      | X                 X                                                      |             
      Follicular Cell, Carcinoma           |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 GENERAL BODY SYSTEM                       |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Tissue NOS                              | +                                                                        |             
      Alveolar/Bronchiolar Carcinoma,      |                                                                          |             
          Metastatic, Lung                 | X                                                                        |             
      Squamous Cell Carcinoma, Metastatic, |                                                                          |             
           Lung                            |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 GENITAL SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Epididymis                              | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             
                                                             Page  36                                                               
NTP Experiment-Test: 05072-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                                         TETRANITROMETHANE                                     Date: 04/16/97  
Route: RESPIRATORY EXPOSURE WHOLE BODY                                                                            Time: 11:46:05  
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 6| 7| 5| 7| 6| 5| 6| 5| 5| 6| 5| 7| 6| 5| 5| 5| 6| 5| 6| 6| 7| 5| 5| 5| 6|             
                             DAY ON TEST   | 2| 2| 4| 0| 5| 0| 7| 4| 9| 0| 7| 2| 5| 0| 4| 6| 8| 1| 3| 9| 2| 4| 4| 4| 0|             
                                           | 9| 8| 9| 8| 7| 0| 4| 7| 0| 9| 3| 8| 9| 6| 1| 2| 5| 3| 2| 4| 3| 6| 7| 8| 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                   | 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| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 7|             
    5 PPM                                  | 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| 1| 2| 3| 4| 5|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 GENITAL SYSTEM - cont                     |                                                                          |             
                                           |                                                                          |             
      Mesothelioma Malignant               |                         X                                            X   |             
      Bilateral, Mesothelioma Malignant    |                               X                                          |             
                                            __________________________________________________________________________|             
   Preputial Gland                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Carcinoma                            |                                                                          |             
                                            __________________________________________________________________________|             
   Prostate                                | +  +  +  +  +  +  +  +  M  +  +  +  +  M  +  +  +  +  +  +  +  +  A  +  +|             
      Leukemia Mononuclear                 |       X                                                                  |             
                                            __________________________________________________________________________|             
   Seminal Vesicle                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |       X                                                                  |             
      Mesothelioma Malignant               |                                                                      X   |             
                                            __________________________________________________________________________|             
   Testes                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Mesothelioma Malignant               |                               X                                          |             
      Bilateral, Mesothelioma Malignant    |                         X                                            X   |             
      Bilateral, Interstitial Cell, Adenoma| X  X     X  X  X           X     X  X     X           X     X           X|             
      Interstitial Cell, Adenoma           |                      X  X     X                 X        X     X  X  X   |             
 _____________________________________________________________________________________________________________________|             
 HEMATOPOIETIC SYSTEM                      |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Bone Marrow                             | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  A  +  +|             
      Leukemia Mononuclear                 |       X                       X     X                                    |             
                                            __________________________________________________________________________|             
   Lymph Node                              | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Axillary, Leukemia Mononuclear       |       X                                                                  |             
      Lumbar, Leukemia Mononuclear         |                                                                          |             
      Mediastinal, Alveolar/Bronchiolar    |                                                                          |             
          Carcinoma, Metastatic, Lung      |                                                                          |             
      Mediastinal, Leukemia Mononuclear    |       X                       X     X     X                              |             
      Pancreatic, Leukemia Mononuclear     |                               X     X                                    |             
                                            __________________________________________________________________________|             
   Lymph Node, Mandibular                  | +  +  +  +  +  +  +  M  +  +  +  +  M  +  +  +  M  +  +  +  +  +  +  +  +|             
      Alveolar/Bronchiolar Carcinoma,      |                                                                          |             
          Metastatic, Lung                 |                                                    X                     |             
      Leukemia Mononuclear                 |       X                                                                  |             
      Mediastinal, Alveolar/Bronchiolar    |                                                                          |             
          Carcinoma, Metastatic, Lung      |                                                             X            |             
                                            __________________________________________________________________________|             
   Lymph Node, Mesenteric                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  M  +  +  M  +|             
      Leukemia Mononuclear                 |       X                       X     X     X                              |             
                                            __________________________________________________________________________|             
   Spleen                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Hemangiosarcoma                      |                                                                          |             
      Leukemia Mononuclear                 |    X  X                    X  X     X     X                    X        X|             
      Mesothelioma Malignant               |                                                                      X   |             
                                            __________________________________________________________________________|             
   Thymus                                  | +  +  +  +  +  +  +  +  M  +  +  +  +  M  +  M  +  +  M  +  +  +  +  +  +|             
      Alveolar/Bronchiolar Carcinoma,      |                                                                          |             
          Metastatic, Lung                 |                   X                                X                     |             
      Leukemia Mononuclear                 |       X                                                                  |             
 _____________________________________________________________________________________________________________________|             
 INTEGUMENTARY SYSTEM                      |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Mammary Gland                           | +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +  +  +  M  +  +  M  +  +|             
 _____________________________________________________________________________________________________________________|             
                                                             Page  37                                                               
NTP Experiment-Test: 05072-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                                         TETRANITROMETHANE                                     Date: 04/16/97  
Route: RESPIRATORY EXPOSURE WHOLE BODY                                                                            Time: 11:46:05  
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 6| 7| 5| 7| 6| 5| 6| 5| 5| 6| 5| 7| 6| 5| 5| 5| 6| 5| 6| 6| 7| 5| 5| 5| 6|             
                             DAY ON TEST   | 2| 2| 4| 0| 5| 0| 7| 4| 9| 0| 7| 2| 5| 0| 4| 6| 8| 1| 3| 9| 2| 4| 4| 4| 0|             
                                           | 9| 8| 9| 8| 7| 0| 4| 7| 0| 9| 3| 8| 9| 6| 1| 2| 5| 3| 2| 4| 3| 6| 7| 8| 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                   | 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| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 7|             
    5 PPM                                  | 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| 1| 2| 3| 4| 5|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 INTEGUMENTARY SYSTEM - cont               |                                                                          |             
                                           |                                                                          |             
      Adenoma                              |                                                                          |             
      Fibroadenoma                         |                                                                      X   |             
      Leukemia Mononuclear                 |       X                                                                  |             
                                            __________________________________________________________________________|             
   Skin                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Subcutaneous Tissue, Fibroma         |                                        X                       X         |             
      Subcutaneous Tissue, Lipoma          |                                              X                           |             
 _____________________________________________________________________________________________________________________|             
 MUSCULOSKELETAL SYSTEM                    |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Bone                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Alveolar/Bronchiolar Carcinoma,      |                                                                          |             
          Metastatic, Lung                 |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 NERVOUS SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Brain                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 RESPIRATORY SYSTEM                        |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Larynx                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Lung                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Alveolar/Bronchiolar Adenoma         | X              X           X                          X        X         |             
      Alveolar/Bronchiolar Carcinoma       |                         X                                               X|             
      Alveolar/Bronchiolar Carcinoma,      |                                                                          |             
          Multiple                         | X  X     X     X  X        X  X  X  X  X     X  X  X  X  X  X  X  X      |             
      Alveolar/Bronchiolar Carcinoma, Two  |                                           X                              |             
      Leukemia Mononuclear                 |       X                    X  X     X     X                             X|             
      Sarcoma                              |                      X                                                   |             
      Squamous Cell Carcinoma              |       X  X  X        X                          X     X           X  X   |             
      Squamous Cell Carcinoma, Two         |                         X                                   X            |             
      Mediastinum, Alveolar/Bronchiolar    |                                                                          |             
          Carcinoma, Metastatic, Lung      |                                                                          |             
      Mediastinum, Leukemia Mononuclear    |       X                                                                  |             
      Pleura, Mediastinum,                 |                                                                          |             
          Alveolar/Bronchiolar Carcinoma,  |                                                                          |             
           Metastatic, Lung                |                                                                          |             
                                            __________________________________________________________________________|             
   Nose                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Trachea                                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             
 SPECIAL SENSES SYSTEM                     |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Ear                                     |                                                                          |             
                                            __________________________________________________________________________|             
   Eye                                     |                                        +                                 |             
                                            __________________________________________________________________________|             
   Zymbal's Gland                          |                                              +                           |             
      Adenoma                              |                                              X                           |             
 _____________________________________________________________________________________________________________________|             
 URINARY SYSTEM                            |                                                                          |             
 _____________________________________________________________________________________________________________________|             
                                                             Page  38                                                               
NTP Experiment-Test: 05072-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                                         TETRANITROMETHANE                                     Date: 04/16/97  
Route: RESPIRATORY EXPOSURE WHOLE BODY                                                                            Time: 11:46:05  
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 6| 7| 5| 7| 6| 5| 6| 5| 5| 6| 5| 7| 6| 5| 5| 5| 6| 5| 6| 6| 7| 5| 5| 5| 6|             
                             DAY ON TEST   | 2| 2| 4| 0| 5| 0| 7| 4| 9| 0| 7| 2| 5| 0| 4| 6| 8| 1| 3| 9| 2| 4| 4| 4| 0|             
                                           | 9| 8| 9| 8| 7| 0| 4| 7| 0| 9| 3| 8| 9| 6| 1| 2| 5| 3| 2| 4| 3| 6| 7| 8| 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                   | 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| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 7|             
    5 PPM                                  | 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| 1| 2| 3| 4| 5|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 URINARY SYSTEM - cont                     |                                                                          |             
                                           |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Kidney                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Alveolar/Bronchiolar Carcinoma,      |                                                                          |             
          Metastatic, Lung                 |                            X                                X            |             
      Leukemia Mononuclear                 |                                                                          |             
      Squamous Cell Carcinoma, Metastatic, |                                                                          |             
           Lung                            |                                                                   X      |             
      Capsule, Mesothelioma Malignant      |                                                                      X   |             
                                            __________________________________________________________________________|             
   Ureter                                  |                                                                          |             
      Alveolar/Bronchiolar Carcinoma,      |                                                                          |             
          Metastatic, Lung                 |                                                                          |             
                                            __________________________________________________________________________|             
   Urinary Bladder                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +   |             
      Leukemia Mononuclear                 |       X                                                                  |             
      Mesothelioma Malignant               |                               X                                      X   |             
 _____________________________________________________________________________________________________________________|             
 SYSTEMIC LESIONS                          |                                                                          |             
                                            __________________________________________________________________________|             
   Multiple Organs                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |    X  X                    X  X     X     X                    X        X|             
      Mesothelioma Malignant               |                         X     X                                      X   |             
 _____________________________________________________________________________________________________________________|             
                                                             Page  39                                                               
NTP Experiment-Test: 05072-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                                         TETRANITROMETHANE                                     Date: 04/16/97  
Route: RESPIRATORY EXPOSURE WHOLE BODY                                                                            Time: 11:46:05  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 5| 7| 6| 6| 5| 6| 6| 4| 5| 6| 6| 6| 6| 7| 5| 5| 7| 6| 6| 7| 6| 6| 6| 5| 5|            |
                             DAY ON TEST   | 6| 0| 7| 3| 1| 1| 1| 9| 7| 5| 9| 7| 5| 2| 3| 2| 2| 9| 3| 1| 0| 0| 0| 4| 4|            |
                                           | 2| 6| 3| 2| 8| 0| 8| 7| 6| 3| 8| 4| 3| 8| 2| 1| 8| 6| 8| 0| 4| 5| 1| 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 MALE                   | 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 2|     T      |
                               ANIMAL ID   | 7| 7| 7| 7| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 0|     A      |
    5 PPM                                  | 6| 7| 8| 9| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0|     L      |
                                           | 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|            |
 __________________________________________________________________________________________________________________________________ 
 ALIMENTARY SYSTEM                         |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Esophagus                               | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Intestine Large                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Intestine Large, Cecum                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
      Mesothelioma Malignant               |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Intestine Large, Colon                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
      Mesothelioma Malignant               |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Intestine Large, Rectum                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  M  +  +|  48        |
      Mesothelioma Malignant               |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Intestine Small                         | +     +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
                                            __________________________________________________________________________|____________|
   Intestine Small, Duodenum               | +     +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  48        |
      Mesothelioma Malignant               |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Intestine Small, Ileum                  | +     +  +  +  +  +  +  +  +  +  +  +  +  +  A  +  +  +  +  +  +  +  +  +|  46        |
      Mesothelioma Malignant               |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Intestine Small, Jejunum                | +     +  +  +  +  +  M  +  +  +  +  +  +  +  A  +  +  +  +  +  +  +  +  +|  45        |
      Mesothelioma Malignant               |                                                                          |          1 |
      Polyp Adenomatous                    |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Liver                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 |                X     X  X  X  X     X     X  X  X     X     X  X  X      |         19 |
                                            __________________________________________________________________________|____________|
   Mesentery                               |                                           +                             +|   6        |
      Leukemia Mononuclear                 |                                           X                              |          2 |
      Mesothelioma Malignant               |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Pancreas                                | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Alveolar/Bronchiolar Carcinoma,      |                                                                          |            |
          Metastatic, Lung                 |    X                                   X           X  X  X               |          6 |
      Leukemia Mononuclear                 |                X                          X                              |          2 |
      Mesothelioma Malignant               |                                                                          |          1 |
      Acinus, Adenoma                      |                                                          X               |          2 |
                                            __________________________________________________________________________|____________|
   Salivary Glands                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
                                            __________________________________________________________________________|____________|
   Stomach                                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Stomach, Forestomach                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Stomach, Glandular                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
 _____________________________________________________________________________________________________________________|            |
 CARDIOVASCULAR SYSTEM                     |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Blood Vessel                            |                                                       +                 +|   2        |
      Aorta, Adventitia,                   |                                                                          |            |
          Alveolar/Bronchiolar Carcinoma,  |                                                                          |            |
           Metastatic, Lung                |                                                       X                  |          1 |
                                            __________________________________________________________________________|____________|
   Heart                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  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  40                                                               
NTP Experiment-Test: 05072-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                                         TETRANITROMETHANE                                     Date: 04/16/97  
Route: RESPIRATORY EXPOSURE WHOLE BODY                                                                            Time: 11:46:05  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 5| 7| 6| 6| 5| 6| 6| 4| 5| 6| 6| 6| 6| 7| 5| 5| 7| 6| 6| 7| 6| 6| 6| 5| 5|            |
                             DAY ON TEST   | 6| 0| 7| 3| 1| 1| 1| 9| 7| 5| 9| 7| 5| 2| 3| 2| 2| 9| 3| 1| 0| 0| 0| 4| 4|            |
                                           | 2| 6| 3| 2| 8| 0| 8| 7| 6| 3| 8| 4| 3| 8| 2| 1| 8| 6| 8| 0| 4| 5| 1| 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 MALE                   | 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 2|     T      |
                               ANIMAL ID   | 7| 7| 7| 7| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 0|     A      |
    5 PPM                                  | 6| 7| 8| 9| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0|     L      |
                                           | 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|            |
 __________________________________________________________________________________________________________________________________ 
 CARDIOVASCULAR SYSTEM - cont              |                                                                          |            |
                                           |                                                                          |            |
      Alveolar/Bronchiolar Carcinoma,      |                                                                          |            |
          Metastatic, Lung                 |                                  X                    X                  |          5 |
      Leukemia Mononuclear                 |                                     X     X  X              X            |          6 |
      Squamous Cell Carcinoma, Metastatic, |                                                                          |            |
           Lung                            |                                                    X                     |          2 |
 _____________________________________________________________________________________________________________________|            |
 ENDOCRINE SYSTEM                          |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Adrenal Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Capsule, Alveolar/Bronchiolar        |                                                                          |            |
          Carcinoma, Metastatic, Lung      |                                        X                                 |          1 |
                                            __________________________________________________________________________|____________|
   Adrenal Gland, Cortex                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  48        |
      Alveolar/Bronchiolar Carcinoma,      |                                                                          |            |
          Metastatic, Lung                 |                                                       X  X     X         |          3 |
      Leukemia Mononuclear                 |                                     X        X                           |          3 |
      Mesothelioma Malignant               |                                                                          |          1 |
      Medulla, Alveolar/Bronchiolar        |                                                                          |            |
          Carcinoma, Metastatic, Lung      |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Adrenal Gland, Medulla                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  47        |
      Alveolar/Bronchiolar Carcinoma,      |                                                                          |            |
          Metastatic, Lung                 |                   X                                                      |          2 |
      Leukemia Mononuclear                 |                X                                                         |          2 |
      Neuroblastoma Benign                 |                                                                          |          1 |
      Pheochromocytoma Malignant           |                                                                         X|          1 |
      Pheochromocytoma Benign              |    X                             X                       X        X      |          7 |
      Pheochromocytoma Benign, Multiple    |                                        X                                X|          3 |
                                            __________________________________________________________________________|____________|
   Islets, Pancreatic                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Adenoma                              |    X              X                          X              X        X   |          6 |
      Alveolar/Bronchiolar Carcinoma,      |                                                                          |            |
          Metastatic, Lung                 |                                                                          |          1 |
      Carcinoma                            |                                     X              X                     |          4 |
                                            __________________________________________________________________________|____________|
   Parathyroid Gland                       | +  +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +  +  +  +  +  +  M  +|  43        |
                                            __________________________________________________________________________|____________|
   Pituitary Gland                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  M  +  +  +  +|  48        |
      Leukemia Mononuclear                 |                X                                                         |          2 |
      Pars Distalis, Adenoma               |          X     X  X           X  X        X  X  X  X                    X|         16 |
      Pars Distalis, Adenoma, Two          |       X                                                                  |          2 |
                                            __________________________________________________________________________|____________|
   Thyroid Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 |                                                                          |          1 |
      C-Cell, Adenoma                      |                                                       X                  |          3 |
      Follicular Cell, Carcinoma           |                                                                      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: 05072-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                                         TETRANITROMETHANE                                     Date: 04/16/97  
Route: RESPIRATORY EXPOSURE WHOLE BODY                                                                            Time: 11:46:05  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 5| 7| 6| 6| 5| 6| 6| 4| 5| 6| 6| 6| 6| 7| 5| 5| 7| 6| 6| 7| 6| 6| 6| 5| 5|            |
                             DAY ON TEST   | 6| 0| 7| 3| 1| 1| 1| 9| 7| 5| 9| 7| 5| 2| 3| 2| 2| 9| 3| 1| 0| 0| 0| 4| 4|            |
                                           | 2| 6| 3| 2| 8| 0| 8| 7| 6| 3| 8| 4| 3| 8| 2| 1| 8| 6| 8| 0| 4| 5| 1| 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 MALE                   | 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 2|     T      |
                               ANIMAL ID   | 7| 7| 7| 7| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 0|     A      |
    5 PPM                                  | 6| 7| 8| 9| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0|     L      |
                                           | 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|            |
 __________________________________________________________________________________________________________________________________ 
 ENDOCRINE SYSTEM - cont                   |                                                                          |            |
                                           |                                                                          |            |
 _____________________________________________________________________________________________________________________|            |
 GENERAL BODY SYSTEM                       |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Tissue NOS                              |                                                    +                     |   2        |
      Alveolar/Bronchiolar Carcinoma,      |                                                                          |            |
          Metastatic, Lung                 |                                                                          |          1 |
      Squamous Cell Carcinoma, Metastatic, |                                                                          |            |
           Lung                            |                                                    X                     |          1 |
 _____________________________________________________________________________________________________________________|            |
 GENITAL SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Epididymis                              | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Mesothelioma Malignant               |                                                                          |          2 |
      Bilateral, Mesothelioma Malignant    |                            X        X                                    |          3 |
                                            __________________________________________________________________________|____________|
   Preputial Gland                         | +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
      Carcinoma                            |                                                                X         |          1 |
                                            __________________________________________________________________________|____________|
   Prostate                                | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  M  +  +|  46        |
      Leukemia Mononuclear                 |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Seminal Vesicle                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  M  +  +|  49        |
      Leukemia Mononuclear                 |                X                                                         |          2 |
      Mesothelioma Malignant               |                                     X                                    |          2 |
                                            __________________________________________________________________________|____________|
   Testes                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Mesothelioma Malignant               |                                                                          |          1 |
      Bilateral, Mesothelioma Malignant    |                            X        X                                    |          4 |
      Bilateral, Interstitial Cell, Adenoma| X                          X        X  X  X     X     X  X  X  X  X      |         23 |
      Interstitial Cell, Adenoma           |    X  X  X        X     X     X  X                                   X   |         16 |
 _____________________________________________________________________________________________________________________|            |
 HEMATOPOIETIC SYSTEM                      |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Bone Marrow                             | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
      Leukemia Mononuclear                 |                X     X     X        X        X  X           X  X         |         11 |
                                            __________________________________________________________________________|____________|
   Lymph Node                              | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Axillary, Leukemia Mononuclear       |                                                                          |          1 |
      Lumbar, Leukemia Mononuclear         |                X                                                         |          1 |
      Mediastinal, Alveolar/Bronchiolar    |                                                                          |            |
          Carcinoma, Metastatic, Lung      |                                  X                                       |          1 |
      Mediastinal, Leukemia Mononuclear    |    X           X                    X     X  X                 X         |         10 |
      Pancreatic, Leukemia Mononuclear     |                      X              X     X                 X  X         |          7 |
                                            __________________________________________________________________________|____________|
   Lymph Node, Mandibular                  | +  +  M  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  46        |
      Alveolar/Bronchiolar Carcinoma,      |                                                                          |            |
          Metastatic, Lung                 |                                                                          |          1 |
      Leukemia Mononuclear                 |                X     X                    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  42                                                               
NTP Experiment-Test: 05072-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                                         TETRANITROMETHANE                                     Date: 04/16/97  
Route: RESPIRATORY EXPOSURE WHOLE BODY                                                                            Time: 11:46:05  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 5| 7| 6| 6| 5| 6| 6| 4| 5| 6| 6| 6| 6| 7| 5| 5| 7| 6| 6| 7| 6| 6| 6| 5| 5|            |
                             DAY ON TEST   | 6| 0| 7| 3| 1| 1| 1| 9| 7| 5| 9| 7| 5| 2| 3| 2| 2| 9| 3| 1| 0| 0| 0| 4| 4|            |
                                           | 2| 6| 3| 2| 8| 0| 8| 7| 6| 3| 8| 4| 3| 8| 2| 1| 8| 6| 8| 0| 4| 5| 1| 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 MALE                   | 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 2|     T      |
                               ANIMAL ID   | 7| 7| 7| 7| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 0|     A      |
    5 PPM                                  | 6| 7| 8| 9| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0|     L      |
                                           | 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|            |
 __________________________________________________________________________________________________________________________________ 
 HEMATOPOIETIC SYSTEM - cont               |                                                                          |            |
                                           |                                                                          |            |
      Mediastinal, Alveolar/Bronchiolar    |                                                                          |            |
          Carcinoma, Metastatic, Lung      |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Lymph Node, Mesenteric                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  48        |
      Leukemia Mononuclear                 |                X     X              X     X  X  X           X  X         |         12 |
                                            __________________________________________________________________________|____________|
   Spleen                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Hemangiosarcoma                      |                                                          X               |          1 |
      Leukemia Mononuclear                 |    X           X     X  X  X  X     X     X  X  X     X     X  X  X      |         22 |
      Mesothelioma Malignant               |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Thymus                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  M  +  +  +  M  +  +  +  M  +  +  +|  43        |
      Alveolar/Bronchiolar Carcinoma,      |                                                                          |            |
          Metastatic, Lung                 |                         X                             X                  |          4 |
      Leukemia Mononuclear                 |                X                          X                              |          3 |
 _____________________________________________________________________________________________________________________|            |
 INTEGUMENTARY SYSTEM                      |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Mammary Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  47        |
      Adenoma                              |                                                          X               |          1 |
      Fibroadenoma                         |                                                                          |          1 |
      Leukemia Mononuclear                 |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Skin                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Subcutaneous Tissue, Fibroma         |                                                 X                        |          3 |
      Subcutaneous Tissue, Lipoma          |                                                                          |          1 |
 _____________________________________________________________________________________________________________________|            |
 MUSCULOSKELETAL SYSTEM                    |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Bone                                    | +     +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
      Alveolar/Bronchiolar Carcinoma,      |                                                                          |            |
          Metastatic, Lung                 |                                                          X               |          1 |
 _____________________________________________________________________________________________________________________|            |
 NERVOUS SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Brain                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 |                                     X     X  X              X            |          4 |
 _____________________________________________________________________________________________________________________|            |
 RESPIRATORY SYSTEM                        |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Larynx                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Lung                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Alveolar/Bronchiolar Adenoma         | X              X  X  X  X                    X                           |         11 |
      Alveolar/Bronchiolar Carcinoma       | X                                                                 X      |          4 |
      Alveolar/Bronchiolar Carcinoma,      |                                                                          |            |
          Multiple                         |    X  X  X  X     X     X  X  X  X     X        X  X  X  X  X  X        X|         35 |
      Alveolar/Bronchiolar Carcinoma, Two  |                X     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  43                                                               
NTP Experiment-Test: 05072-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                                         TETRANITROMETHANE                                     Date: 04/16/97  
Route: RESPIRATORY EXPOSURE WHOLE BODY                                                                            Time: 11:46:05  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 5| 7| 6| 6| 5| 6| 6| 4| 5| 6| 6| 6| 6| 7| 5| 5| 7| 6| 6| 7| 6| 6| 6| 5| 5|            |
                             DAY ON TEST   | 6| 0| 7| 3| 1| 1| 1| 9| 7| 5| 9| 7| 5| 2| 3| 2| 2| 9| 3| 1| 0| 0| 0| 4| 4|            |
                                           | 2| 6| 3| 2| 8| 0| 8| 7| 6| 3| 8| 4| 3| 8| 2| 1| 8| 6| 8| 0| 4| 5| 1| 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 MALE                   | 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 2|     T      |
                               ANIMAL ID   | 7| 7| 7| 7| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 0|     A      |
    5 PPM                                  | 6| 7| 8| 9| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0|     L      |
                                           | 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|            |
 __________________________________________________________________________________________________________________________________ 
 RESPIRATORY SYSTEM - cont                 |                                                                          |            |
                                           |                                                                          |            |
      Leukemia Mononuclear                 |                X     X  X  X  X     X     X  X              X     X      |         16 |
      Sarcoma                              |                                                                          |          1 |
      Squamous Cell Carcinoma              |             X           X     X  X              X  X                     |         14 |
      Squamous Cell Carcinoma, Two         |                                     X                       X  X         |          5 |
      Mediastinum, Alveolar/Bronchiolar    |                                                                          |            |
          Carcinoma, Metastatic, Lung      |                                                       X                  |          1 |
      Mediastinum, Leukemia Mononuclear    |                                           X                              |          2 |
      Pleura, Mediastinum,                 |                                                                          |            |
          Alveolar/Bronchiolar Carcinoma,  |                                                                          |            |
           Metastatic, Lung                |                                                                   X      |          1 |
                                            __________________________________________________________________________|____________|
   Nose                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 |                                     X                                    |          1 |
                                            __________________________________________________________________________|____________|
   Trachea                                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
 _____________________________________________________________________________________________________________________|            |
 SPECIAL SENSES SYSTEM                     |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Ear                                     |                                                    +                     |   1        |
                                            __________________________________________________________________________|____________|
   Eye                                     |                                              +           +     +         |   4        |
                                            __________________________________________________________________________|____________|
   Zymbal's Gland                          |                                                                          |   1        |
      Adenoma                              |                                                                          |          1 |
 _____________________________________________________________________________________________________________________|            |
 URINARY SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Kidney                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Alveolar/Bronchiolar Carcinoma,      |                                                                          |            |
          Metastatic, Lung                 | X                                      X                          X      |          5 |
      Leukemia Mononuclear                 |                X                             X                           |          2 |
      Squamous Cell Carcinoma, Metastatic, |                                                                          |            |
           Lung                            |                                                    X                     |          2 |
      Capsule, Mesothelioma Malignant      |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Ureter                                  |                                                       +                  |   1        |
      Alveolar/Bronchiolar Carcinoma,      |                                                                          |            |
          Metastatic, Lung                 |                                                       X                  |          1 |
                                            __________________________________________________________________________|____________|
   Urinary Bladder                         | +  +  +  +  M  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  48        |
      Leukemia Mononuclear                 |                X                                                         |          2 |
      Mesothelioma Malignant               |                                                                          |          2 |
 __________________________________________________________________________________________________________________________________ 
 SYSTEMIC LESIONS                          |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Multiple Organs                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Leukemia Mononuclear                 |    X           X     X  X  X  X     X     X  X  X     X     X  X  X      |         22 |
      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  44                                                               
NTP Experiment-Test: 05072-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                                         TETRANITROMETHANE                                     Date: 04/16/97  
Route: RESPIRATORY EXPOSURE WHOLE BODY                                                                            Time: 11:46:05  
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 6| 7| 7| 5| 4| 7| 6| 7| 5| 7| 6| 7| 6| 6| 6| 6| 5| 7| 6| 7| 5| 6| 5| 6| 6|             
                             DAY ON TEST   | 8| 2| 2| 5| 8| 2| 8| 2| 6| 2| 9| 2| 8| 7| 1| 0| 9| 2| 3| 0| 4| 5| 4| 3| 6|             
                                           | 7| 7| 7| 6| 6| 7| 7| 7| 0| 7| 2| 8| 8| 5| 9| 5| 8| 8| 3| 8| 7| 9| 1| 3| 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 MALE                   | 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|             
                               ANIMAL ID   | 5| 5| 5| 5| 5| 5| 5| 5| 5| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 7|             
    2 PPM                                  | 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| 1| 2| 3| 4| 5|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 ALIMENTARY SYSTEM                         |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Esophagus                               | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Large                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Large, Cecum                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Large, Colon                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  A  +  +|             
      Mesothelioma Malignant               |                         X                                                |             
                                            __________________________________________________________________________|             
   Intestine Large, Rectum                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  A  +  +|             
      Mesothelioma Malignant               |                         X                                                |             
                                            __________________________________________________________________________|             
   Intestine Small                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Small, Duodenum               | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenocarcinoma                       |                                                                         X|             
      Mesothelioma Malignant               |                         X                                                |             
                                            __________________________________________________________________________|             
   Intestine Small, Ileum                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +  A  +  +|             
      Leukemia Mononuclear                 |                                                                          |             
      Peyer's Patch, Fibrous Histiocytoma  |                                                                          |             
                                            __________________________________________________________________________|             
   Intestine Small, Jejunum                | +  +  +  A  +  +  +  M  +  +  +  +  +  +  +  +  +  +  +  +  +  +  A  +  +|             
                                            __________________________________________________________________________|             
   Liver                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Alveolar/Bronchiolar Carcinoma,      |                                                                          |             
          Multiple, Metastatic, Lung       |                               X                                          |             
      Fibrous Histiocytoma                 |                                                                          |             
      Hepatocellular Adenoma               |                                                                          |             
      Histiocytic Sarcoma                  |                                                                          |             
      Leukemia Mononuclear                 | X        X  X  X  X  X           X  X  X              X  X  X        X   |             
      Neoplastic Nodule                    |                                              X                           |             
      Serosa, Mesothelioma Malignant       |                         X                                                |             
                                            __________________________________________________________________________|             
   Mesentery                               |             +           +              +        +                        |             
      Histiocytic Sarcoma                  |                                                                          |             
      Leukemia Mononuclear                 |                                        X                                 |             
      Mesothelioma Malignant               |                         X                                                |             
                                            __________________________________________________________________________|             
   Pancreas                                | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Histiocytic Sarcoma                  |                                                                          |             
      Leukemia Mononuclear                 |                                        X                                 |             
      Mesothelioma Malignant               |                         X                                                |             
                                            __________________________________________________________________________|             
   Salivary Glands                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Stomach                                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Stomach, Forestomach                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Histiocytic Sarcoma                  |                                                                          |             
      Squamous Cell Papilloma              |                                                                X         |             
                                            __________________________________________________________________________|             
   Stomach, Glandular                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Tongue                                  |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 CARDIOVASCULAR SYSTEM                     |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Blood Vessel                            |                      +                                                   |             
                                            __________________________________________________________________________|             
   Heart                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Alveolar/Bronchiolar Carcinoma,      |                                                                          |             
 _____________________________________________________________________________________________________________________|             
                                                             Page  45                                                               
NTP Experiment-Test: 05072-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                                         TETRANITROMETHANE                                     Date: 04/16/97  
Route: RESPIRATORY EXPOSURE WHOLE BODY                                                                            Time: 11:46:05  
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 6| 7| 7| 5| 4| 7| 6| 7| 5| 7| 6| 7| 6| 6| 6| 6| 5| 7| 6| 7| 5| 6| 5| 6| 6|             
                             DAY ON TEST   | 8| 2| 2| 5| 8| 2| 8| 2| 6| 2| 9| 2| 8| 7| 1| 0| 9| 2| 3| 0| 4| 5| 4| 3| 6|             
                                           | 7| 7| 7| 6| 6| 7| 7| 7| 0| 7| 2| 8| 8| 5| 9| 5| 8| 8| 3| 8| 7| 9| 1| 3| 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 MALE                   | 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|             
                               ANIMAL ID   | 5| 5| 5| 5| 5| 5| 5| 5| 5| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 7|             
    2 PPM                                  | 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| 1| 2| 3| 4| 5|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 CARDIOVASCULAR SYSTEM - cont              |                                                                          |             
                                           |                                                                          |             
          Metastatic, Lung                 |                               X                                X         |             
      Fibrous Histiocytoma                 |                                                                          |             
      Leukemia Mononuclear                 |                                                                          |             
      Epicardium, Carcinoma, Metastatic,   |                                                                          |             
           Uncertain Primary Site          |                                                                          |             
      Epicardium, Histiocytic Sarcoma      |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 ENDOCRINE SYSTEM                          |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Adrenal Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Adrenal Gland, Cortex                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |                                                                          |             
      Alveolar/Bronchiolar Carcinoma,      |                                                                          |             
          Metastatic, Lung                 |                                                                          |             
      Leukemia Mononuclear                 |                                                                          |             
      Medulla, Alveolar/Bronchiolar        |                                                                          |             
          Carcinoma, Metastatic, Lung      |                                                                X         |             
                                            __________________________________________________________________________|             
   Adrenal Gland, Medulla                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +     +  +  +|             
      Leukemia Mononuclear                 |                                                                          |             
      Pheochromocytoma Malignant           |                                                                          |             
      Pheochromocytoma Benign              |                      X     X                    X     X  X        X      |             
      Pheochromocytoma Benign, Multiple    |                                                                          |             
      Bilateral, Pheochromocytoma Benign   |                                                                          |             
                                            __________________________________________________________________________|             
   Islets, Pancreatic                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |                                                       X                  |             
      Carcinoma                            |                                     X                                    |             
                                            __________________________________________________________________________|             
   Parathyroid Gland                       | +  +  +  +  M  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |                                                                         X|             
                                            __________________________________________________________________________|             
   Pituitary Gland                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X           X                          X                                 |             
      Pars Distalis, Adenoma               | X                 X  X     X        X  X  X  X  X              X     X  X|             
      Pars Distalis, Adenoma, Two          |                X                                                         |             
      Pars Distalis, Carcinoma             |                                                                          |             
                                            __________________________________________________________________________|             
   Thyroid Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      C-Cell, Adenoma                      |                                                                          |             
      C-Cell, Carcinoma                    |                      X                                                   |             
 _____________________________________________________________________________________________________________________|             
 GENERAL BODY SYSTEM                       |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Tissue NOS                              |                                                                +         |             
      Alveolar/Bronchiolar Carcinoma,      |                                                                          |             
          Metastatic, Lung                 |                                                                X         |             
 _____________________________________________________________________________________________________________________|             
 GENITAL SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Coagulating Gland                       |                                     +                                    |             
                                            __________________________________________________________________________|             
   Epididymis                              | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +     +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             
                                                             Page  46                                                               
NTP Experiment-Test: 05072-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                                         TETRANITROMETHANE                                     Date: 04/16/97  
Route: RESPIRATORY EXPOSURE WHOLE BODY                                                                            Time: 11:46:05  
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 6| 7| 7| 5| 4| 7| 6| 7| 5| 7| 6| 7| 6| 6| 6| 6| 5| 7| 6| 7| 5| 6| 5| 6| 6|             
                             DAY ON TEST   | 8| 2| 2| 5| 8| 2| 8| 2| 6| 2| 9| 2| 8| 7| 1| 0| 9| 2| 3| 0| 4| 5| 4| 3| 6|             
                                           | 7| 7| 7| 6| 6| 7| 7| 7| 0| 7| 2| 8| 8| 5| 9| 5| 8| 8| 3| 8| 7| 9| 1| 3| 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 MALE                   | 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|             
                               ANIMAL ID   | 5| 5| 5| 5| 5| 5| 5| 5| 5| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 7|             
    2 PPM                                  | 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| 1| 2| 3| 4| 5|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 GENITAL SYSTEM - cont                     |                                                                          |             
                                           |                                                                          |             
      Bilateral, Mesothelioma Malignant    |                         X                                                |             
                                            __________________________________________________________________________|             
   Preputial Gland                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Carcinoma                            |          X                                                               |             
      Squamous Cell Carcinoma              |                                                                          |             
                                            __________________________________________________________________________|             
   Prostate                                | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |                                                                          |             
                                            __________________________________________________________________________|             
   Seminal Vesicle                         | +  +  +  +  M  +  +  +  +  +  +  +  +  +  +  +  +     +  +  +  +  +  +  +|             
      Bilateral, Mesothelioma Malignant    |                         X                                                |             
                                            __________________________________________________________________________|             
   Testes                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Mesothelioma Malignant               |                   X                                                      |             
      Bilateral, Mesothelioma Malignant    |                         X                                                |             
      Bilateral, Interstitial Cell, Adenoma| X  X  X              X        X        X           X  X  X  X           X|             
      Interstitial Cell, Adenoma           |                X  X     X  X     X                             X  X      |             
 _____________________________________________________________________________________________________________________|             
 HEMATOPOIETIC SYSTEM                      |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Blood                                   |                                                                          |             
                                            __________________________________________________________________________|             
   Bone Marrow                             | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |          X     X                    X  X              X                  |             
                                            __________________________________________________________________________|             
   Lymph Node                              | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Axillary, Leukemia Mononuclear       |                                                                          |             
      Inguinal, Leukemia Mononuclear       |                                                                          |             
      Mediastinal, Alveolar/Bronchiolar    |                                                                          |             
          Carcinoma, Metastatic, Lung      |                               X                                          |             
      Mediastinal, Histiocytic Sarcoma     |                                                                          |             
      Mediastinal, Leukemia Mononuclear    |          X  X        X     X        X  X                 X  X            |             
      Mediastinal, Mesothelioma Malignant  |                         X                                                |             
      Pancreatic, Leukemia Mononuclear     | X        X     X                       X                                 |             
                                            __________________________________________________________________________|             
   Lymph Node, Mandibular                  | +  +  +  +  M  +  +  +  +  +  +  M  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Fibrous Histiocytoma                 |                                                                          |             
      Leukemia Mononuclear                 | X        X     X                                                         |             
                                            __________________________________________________________________________|             
   Lymph Node, Mesenteric                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +  +  +|             
      Histiocytic Sarcoma                  |                                                                          |             
      Leukemia Mononuclear                 | X        X  X  X           X        X  X                 X               |             
                                            __________________________________________________________________________|             
   Spleen                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X        X  X  X  X  X     X     X  X  X              X  X  X        X   |             
                                            __________________________________________________________________________|             
   Thymus                                  | +  M  +  +  M  +  +  +  +  +  +  +  +  M  +  +  M  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 INTEGUMENTARY SYSTEM                      |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Mammary Gland                           | +  +  +  +  +  +  M  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Skin                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Basal Cell Adenoma                   |                                                                          |             
      Keratoacanthoma                      |                               X                                          |             
 _____________________________________________________________________________________________________________________|             
                                                             Page  47                                                               
NTP Experiment-Test: 05072-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                                         TETRANITROMETHANE                                     Date: 04/16/97  
Route: RESPIRATORY EXPOSURE WHOLE BODY                                                                            Time: 11:46:05  
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 6| 7| 7| 5| 4| 7| 6| 7| 5| 7| 6| 7| 6| 6| 6| 6| 5| 7| 6| 7| 5| 6| 5| 6| 6|             
                             DAY ON TEST   | 8| 2| 2| 5| 8| 2| 8| 2| 6| 2| 9| 2| 8| 7| 1| 0| 9| 2| 3| 0| 4| 5| 4| 3| 6|             
                                           | 7| 7| 7| 6| 6| 7| 7| 7| 0| 7| 2| 8| 8| 5| 9| 5| 8| 8| 3| 8| 7| 9| 1| 3| 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 MALE                   | 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|             
                               ANIMAL ID   | 5| 5| 5| 5| 5| 5| 5| 5| 5| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 7|             
    2 PPM                                  | 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| 1| 2| 3| 4| 5|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 INTEGUMENTARY SYSTEM - cont               |                                                                          |             
                                           |                                                                          |             
      Squamous Cell Papilloma              |                                                                          |             
      Trichoepithelioma                    |                                                                          |             
      Subcutaneous Tissue, Fibroma         |                                                          X     X         |             
      Subcutaneous Tissue, Lipoma          |                                                                          |             
      Subcutaneous Tissue, Sarcoma         |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 MUSCULOSKELETAL SYSTEM                    |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Bone                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Periosteum, Femur, Fibrous           |                                                                          |             
          Histiocytoma                     |                                                                          |             
      Right, Femur, Osteosarcoma           |                                                                          |             
                                            __________________________________________________________________________|             
   Skeletal Muscle                         |                                                                          |             
      Hindlimb, Fibrous Histiocytoma       |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 NERVOUS SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Brain                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Granular Cell Tumor Benign           |                                                                          |             
      Leukemia Mononuclear                 |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 RESPIRATORY SYSTEM                        |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Larynx                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Lung                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Alveolar/Bronchiolar Adenoma         | X  X                 X           X     X        X                        |             
      Alveolar/Bronchiolar Adenoma,        |                                                                          |             
          Multiple                         |       X                    X                                             |             
      Alveolar/Bronchiolar Carcinoma       |    X  X  X     X        X  X                 X     X     X     X     X   |             
      Alveolar/Bronchiolar Carcinoma,      |                                                                          |             
          Multiple                         |                      X        X                                          |             
      Alveolar/Bronchiolar Carcinoma, Two  |                                  X                    X                  |             
      Fibrous Histiocytoma                 |                                                                          |             
      Histiocytic Sarcoma                  |                                                                          |             
      Leukemia Mononuclear                 | X        X  X  X  X  X              X  X              X  X  X            |             
      Squamous Cell Carcinoma              |                                                                          |             
      Mediastinum, Leukemia Mononuclear    |                                                                          |             
                                            __________________________________________________________________________|             
   Nose                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Trachea                                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             
 SPECIAL SENSES SYSTEM                     |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Eye                                     |                                                 +                 A      |             
                                            __________________________________________________________________________|             
   Harderian Gland                         |                                                                   +      |             
                                            __________________________________________________________________________|             
   Lacrimal Gland                          |                                                                          |             
                                            __________________________________________________________________________|             
   Zymbal's Gland                          |                                                                          |             
      Squamous Cell Papilloma              |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 URINARY SYSTEM                            |                                                                          |             
 _____________________________________________________________________________________________________________________|             
                                                             Page  48                                                               
NTP Experiment-Test: 05072-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                                         TETRANITROMETHANE                                     Date: 04/16/97  
Route: RESPIRATORY EXPOSURE WHOLE BODY                                                                            Time: 11:46:05  
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 6| 7| 7| 5| 4| 7| 6| 7| 5| 7| 6| 7| 6| 6| 6| 6| 5| 7| 6| 7| 5| 6| 5| 6| 6|             
                             DAY ON TEST   | 8| 2| 2| 5| 8| 2| 8| 2| 6| 2| 9| 2| 8| 7| 1| 0| 9| 2| 3| 0| 4| 5| 4| 3| 6|             
                                           | 7| 7| 7| 6| 6| 7| 7| 7| 0| 7| 2| 8| 8| 5| 9| 5| 8| 8| 3| 8| 7| 9| 1| 3| 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 MALE                   | 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|             
                               ANIMAL ID   | 5| 5| 5| 5| 5| 5| 5| 5| 5| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 7|             
    2 PPM                                  | 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| 1| 2| 3| 4| 5|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 URINARY SYSTEM - cont                     |                                                                          |             
                                           |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Kidney                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Alveolar/Bronchiolar Carcinoma,      |                                                                          |             
          Metastatic, Lung                 |                                                                          |             
      Leukemia Mononuclear                 |                                                                          |             
      Bilateral, Alveolar/Bronchiolar      |                                                                          |             
          Carcinoma, Metastatic, Lung      |                                                                X         |             
      Capsule, Histiocytic Sarcoma         |                                                                          |             
      Capsule, Mesothelioma Malignant      |                         X                                                |             
                                            __________________________________________________________________________|             
   Urinary Bladder                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Mesothelioma Malignant               |                         X                                                |             
 _____________________________________________________________________________________________________________________|             
 SYSTEMIC LESIONS                          |                                                                          |             
                                            __________________________________________________________________________|             
   Multiple Organs                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Histiocytic Sarcoma                  |                                                                          |             
      Leukemia Mononuclear                 | X        X  X  X  X  X     X     X  X  X              X  X  X        X   |             
      Mesothelioma Malignant               |                   X     X                                                |             
 _____________________________________________________________________________________________________________________|             
                                                             Page  49                                                               
NTP Experiment-Test: 05072-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                                         TETRANITROMETHANE                                     Date: 04/16/97  
Route: RESPIRATORY EXPOSURE WHOLE BODY                                                                            Time: 11:46:05  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 7| 5| 7| 7| 6| 6| 7| 7| 6| 7| 6| 6| 7| 7| 7| 5| 7| 7| 3| 7| 5| 5| 6| 6| 7|            |
                             DAY ON TEST   | 2| 3| 2| 2| 7| 7| 0| 2| 9| 2| 6| 8| 2| 2| 2| 9| 2| 2| 5| 2| 3| 3| 1| 7| 2|            |
                                           | 8| 5| 8| 8| 5| 4| 7| 8| 9| 6| 1| 1| 9| 9| 9| 1| 9| 9| 3| 9| 5| 3| 9| 5| 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                   | 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|     T      |
                               ANIMAL ID   | 7| 7| 7| 7| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 0|     A      |
    2 PPM                                  | 6| 7| 8| 9| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0|     L      |
                                           | 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|            |
 __________________________________________________________________________________________________________________________________ 
 ALIMENTARY SYSTEM                         |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Esophagus                               | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Intestine Large                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Intestine Large, Cecum                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  A  +  +  +  +  +  +|  49        |
                                            __________________________________________________________________________|____________|
   Intestine Large, Colon                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  A  +  +  A  +  +  +|  47        |
      Mesothelioma Malignant               |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Intestine Large, Rectum                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  A  +  +  +  +  +  +|  48        |
      Mesothelioma Malignant               |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Intestine Small                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Intestine Small, Duodenum               | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  A  +  +  +  +  +  +|  49        |
      Adenocarcinoma                       |                                                                          |          1 |
      Mesothelioma Malignant               |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Intestine Small, Ileum                  | +  +  +  +  +  +  +  M  +  +  +  +  +  +  +  +  +  +  A  +  +  A  +  +  +|  45        |
      Leukemia Mononuclear                 |                X                                                         |          1 |
      Peyer's Patch, Fibrous Histiocytoma  |                   X                                                      |          1 |
                                            __________________________________________________________________________|____________|
   Intestine Small, Jejunum                | +  +  +  +  +  +  +  +  A  A  +  A  +  +  +  +  +  +  A  +  +  A  +  +  +|  42        |
                                            __________________________________________________________________________|____________|
   Liver                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Alveolar/Bronchiolar Carcinoma,      |                                                                          |            |
          Multiple, Metastatic, Lung       |                                                                          |          1 |
      Fibrous Histiocytoma                 |                   X                                                      |          1 |
      Hepatocellular Adenoma               |                         X                                                |          1 |
      Histiocytic Sarcoma                  |                                  X                                       |          1 |
      Leukemia Mononuclear                 | X        X     X     X                       X  X        X        X     X|         22 |
      Neoplastic Nodule                    |                                                                          |          1 |
      Serosa, Mesothelioma Malignant       |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Mesentery                               |             +                    +     +                                 |   7        |
      Histiocytic Sarcoma                  |                                  X                                       |          1 |
      Leukemia Mononuclear                 |                                                                          |          1 |
      Mesothelioma Malignant               |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Pancreas                                | +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +  +  +  A  +  +  +  +  +  +|  48        |
      Histiocytic Sarcoma                  |                                  X                                       |          1 |
      Leukemia Mononuclear                 |                      X                                                   |          2 |
      Mesothelioma Malignant               |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Salivary Glands                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Stomach                                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Stomach, Forestomach                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  A  +  +  +  +  +  +|  49        |
      Histiocytic Sarcoma                  |                                  X                                       |          1 |
      Squamous Cell Papilloma              |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Stomach, Glandular                      | +  +  M  +  +  +  +  +  +  +  +     +  +  +  +  +  +  A  +  +  +  +  +  +|  47        |
                                            __________________________________________________________________________|____________|
   Tongue                                  |                                     +                                    |   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  50                                                               
NTP Experiment-Test: 05072-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                                         TETRANITROMETHANE                                     Date: 04/16/97  
Route: RESPIRATORY EXPOSURE WHOLE BODY                                                                            Time: 11:46:05  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 7| 5| 7| 7| 6| 6| 7| 7| 6| 7| 6| 6| 7| 7| 7| 5| 7| 7| 3| 7| 5| 5| 6| 6| 7|            |
                             DAY ON TEST   | 2| 3| 2| 2| 7| 7| 0| 2| 9| 2| 6| 8| 2| 2| 2| 9| 2| 2| 5| 2| 3| 3| 1| 7| 2|            |
                                           | 8| 5| 8| 8| 5| 4| 7| 8| 9| 6| 1| 1| 9| 9| 9| 1| 9| 9| 3| 9| 5| 3| 9| 5| 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                   | 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|     T      |
                               ANIMAL ID   | 7| 7| 7| 7| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 0|     A      |
    2 PPM                                  | 6| 7| 8| 9| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0|     L      |
                                           | 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|            |
 __________________________________________________________________________________________________________________________________ 
 ALIMENTARY SYSTEM - cont                  |                                                                          |            |
                                           |                                                                          |            |
 _____________________________________________________________________________________________________________________|            |
 CARDIOVASCULAR SYSTEM                     |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Blood Vessel                            |             +                                            +               |   3        |
                                            __________________________________________________________________________|____________|
   Heart                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Alveolar/Bronchiolar Carcinoma,      |                                                                          |            |
          Metastatic, Lung                 |                                                                X         |          3 |
      Fibrous Histiocytoma                 |                   X                                                      |          1 |
      Leukemia Mononuclear                 |                X     X                       X                           |          3 |
      Epicardium, Carcinoma, Metastatic,   |                                                                          |            |
           Uncertain Primary Site          |                      X                                                   |          1 |
      Epicardium, Histiocytic Sarcoma      |                                  X                                       |          1 |
 _____________________________________________________________________________________________________________________|            |
 ENDOCRINE SYSTEM                          |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Adrenal Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
                                            __________________________________________________________________________|____________|
   Adrenal Gland, Cortex                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  A  +  +  +  +  +  +|  49        |
      Adenoma                              |                                     X                                    |          1 |
      Alveolar/Bronchiolar Carcinoma,      |                                                                          |            |
          Metastatic, Lung                 |             X                                                            |          1 |
      Leukemia Mononuclear                 |                X                                                         |          1 |
      Medulla, Alveolar/Bronchiolar        |                                                                          |            |
          Carcinoma, Metastatic, Lung      |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Adrenal Gland, Medulla                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  A  +  +  +  +  +  +|  47        |
      Leukemia Mononuclear                 |                X                                                         |          1 |
      Pheochromocytoma Malignant           |                         X                                X               |          2 |
      Pheochromocytoma Benign              |       X  X  X              X     X     X           X     X               |         14 |
      Pheochromocytoma Benign, Multiple    |                X                                                         |          1 |
      Bilateral, Pheochromocytoma Benign   |                                                                         X|          1 |
                                            __________________________________________________________________________|____________|
   Islets, Pancreatic                      | +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +  +  +  A  +  +  +  +  +  +|  48        |
      Adenoma                              |                               X           X     X                       X|          5 |
      Carcinoma                            |                                                             X        X   |          3 |
                                            __________________________________________________________________________|____________|
   Parathyroid Gland                       | +  +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +  +  +  +  +  +  +  +|  48        |
      Adenoma                              |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Pituitary Gland                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  A  +  +  +  +  +  +|  49        |
      Leukemia Mononuclear                 |                                                                         X|          4 |
      Pars Distalis, Adenoma               |             X        X     X           X  X  X  X  X     X              X|         22 |
      Pars Distalis, Adenoma, Two          |       X                                                                  |          2 |
      Pars Distalis, Carcinoma             | X                                                                        |          1 |
                                            __________________________________________________________________________|____________|
   Thyroid Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +|  49        |
      C-Cell, Adenoma                      |          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  51                                                               
NTP Experiment-Test: 05072-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                                         TETRANITROMETHANE                                     Date: 04/16/97  
Route: RESPIRATORY EXPOSURE WHOLE BODY                                                                            Time: 11:46:05  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 7| 5| 7| 7| 6| 6| 7| 7| 6| 7| 6| 6| 7| 7| 7| 5| 7| 7| 3| 7| 5| 5| 6| 6| 7|            |
                             DAY ON TEST   | 2| 3| 2| 2| 7| 7| 0| 2| 9| 2| 6| 8| 2| 2| 2| 9| 2| 2| 5| 2| 3| 3| 1| 7| 2|            |
                                           | 8| 5| 8| 8| 5| 4| 7| 8| 9| 6| 1| 1| 9| 9| 9| 1| 9| 9| 3| 9| 5| 3| 9| 5| 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                   | 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|     T      |
                               ANIMAL ID   | 7| 7| 7| 7| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 0|     A      |
    2 PPM                                  | 6| 7| 8| 9| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0|     L      |
                                           | 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|            |
 __________________________________________________________________________________________________________________________________ 
 ENDOCRINE SYSTEM - cont                   |                                                                          |            |
                                           |                                                                          |            |
      C-Cell, Carcinoma                    |                                                                          |          1 |
 _____________________________________________________________________________________________________________________|            |
 GENERAL BODY SYSTEM                       |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Tissue NOS                              |                                                                          |   1        |
      Alveolar/Bronchiolar Carcinoma,      |                                                                          |            |
          Metastatic, Lung                 |                                                                          |          1 |
 _____________________________________________________________________________________________________________________|            |
 GENITAL SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Coagulating Gland                       |                                                                          |   1        |
                                            __________________________________________________________________________|____________|
   Epididymis                              | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  49        |
      Bilateral, Mesothelioma Malignant    |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Preputial Gland                         | +  M  +  +  +  +  +  +  +     +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  48        |
      Carcinoma                            |                      X                                                   |          2 |
      Squamous Cell Carcinoma              | X                                                                        |          1 |
                                            __________________________________________________________________________|____________|
   Prostate                                | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Adenoma                              |          X                                                               |          1 |
                                            __________________________________________________________________________|____________|
   Seminal Vesicle                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +|  47        |
      Bilateral, Mesothelioma Malignant    |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Testes                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Mesothelioma Malignant               |                                                                          |          1 |
      Bilateral, Mesothelioma Malignant    |                                                                          |          1 |
      Bilateral, Interstitial Cell, Adenoma| X  X     X        X              X  X  X  X        X              X  X  X|         23 |
      Interstitial Cell, Adenoma           |       X     X           X  X  X              X  X        X               |         15 |
 _____________________________________________________________________________________________________________________|            |
 HEMATOPOIETIC SYSTEM                      |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Blood                                   |                            +                                             |   1        |
                                            __________________________________________________________________________|____________|
   Bone Marrow                             | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  M|  49        |
      Leukemia Mononuclear                 | X              X                                X                        |          8 |
                                            __________________________________________________________________________|____________|
   Lymph Node                              | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Axillary, Leukemia Mononuclear       |                                              X                           |          1 |
      Inguinal, Leukemia Mononuclear       |                                                                         X|          1 |
      Mediastinal, Alveolar/Bronchiolar    |                                                                          |            |
          Carcinoma, Metastatic, Lung      |                               X                                X         |          3 |
      Mediastinal, Histiocytic Sarcoma     |                                  X                                       |          1 |
      Mediastinal, Leukemia Mononuclear    |                X                             X                          X|         11 |
      Mediastinal, Mesothelioma Malignant  |                                                                          |          1 |
      Pancreatic, Leukemia Mononuclear     |                                              X                           |          5 |
                                            __________________________________________________________________________|____________|
   Lymph Node, Mandibular                  | +  +  +  +  +  +  +  +  M  M  +  +  +  +  +  +  +  +  M  +  +  M  +  +  +|  44        |
      Fibrous Histiocytoma                 |                   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  52                                                               
NTP Experiment-Test: 05072-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                                         TETRANITROMETHANE                                     Date: 04/16/97  
Route: RESPIRATORY EXPOSURE WHOLE BODY                                                                            Time: 11:46:05  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 7| 5| 7| 7| 6| 6| 7| 7| 6| 7| 6| 6| 7| 7| 7| 5| 7| 7| 3| 7| 5| 5| 6| 6| 7|            |
                             DAY ON TEST   | 2| 3| 2| 2| 7| 7| 0| 2| 9| 2| 6| 8| 2| 2| 2| 9| 2| 2| 5| 2| 3| 3| 1| 7| 2|            |
                                           | 8| 5| 8| 8| 5| 4| 7| 8| 9| 6| 1| 1| 9| 9| 9| 1| 9| 9| 3| 9| 5| 3| 9| 5| 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                   | 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|     T      |
                               ANIMAL ID   | 7| 7| 7| 7| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 0|     A      |
    2 PPM                                  | 6| 7| 8| 9| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0|     L      |
                                           | 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|            |
 __________________________________________________________________________________________________________________________________ 
 HEMATOPOIETIC SYSTEM - cont               |                                                                          |            |
                                           |                                                                          |            |
      Leukemia Mononuclear                 |                X                             X                          X|          6 |
                                            __________________________________________________________________________|____________|
   Lymph Node, Mesenteric                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +|  48        |
      Histiocytic Sarcoma                  |                                  X                                       |          1 |
      Leukemia Mononuclear                 |                X                             X  X        X        X     X|         14 |
                                            __________________________________________________________________________|____________|
   Spleen                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  A  +  +  +  +  +  +|  49        |
      Leukemia Mononuclear                 | X     X  X  X  X     X              X        X  X        X        X     X|         26 |
                                            __________________________________________________________________________|____________|
   Thymus                                  | +  +  +  +  +  +  M  +  M  +  +  +  +  +  +  +  +  +     +  +  +  M  +  +|  42        |
      Leukemia Mononuclear                 |                X                             X                           |          2 |
 _____________________________________________________________________________________________________________________|            |
 INTEGUMENTARY SYSTEM                      |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Mammary Gland                           | +  +  +  +  +  M  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  M  +  +|  46        |
      Leukemia Mononuclear                 |                                                                         X|          1 |
                                            __________________________________________________________________________|____________|
   Skin                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  M  +  +|  49        |
      Basal Cell Adenoma                   |                                     X                                    |          1 |
      Keratoacanthoma                      |                                                                         X|          2 |
      Squamous Cell Papilloma              |       X                                                                  |          1 |
      Trichoepithelioma                    |                      X                                                   |          1 |
      Subcutaneous Tissue, Fibroma         |                                                                          |          2 |
      Subcutaneous Tissue, Lipoma          |                                                                         X|          1 |
      Subcutaneous Tissue, Sarcoma         |    X                                                                     |          1 |
 _____________________________________________________________________________________________________________________|            |
 MUSCULOSKELETAL SYSTEM                    |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Bone                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  M|  49        |
      Periosteum, Femur, Fibrous           |                                                                          |            |
          Histiocytoma                     |                   X                                                      |          1 |
      Right, Femur, Osteosarcoma           |                                           X                              |          1 |
                                            __________________________________________________________________________|____________|
   Skeletal Muscle                         |                   +                                                      |   1        |
      Hindlimb, Fibrous Histiocytoma       |                   X                                                      |          1 |
 _____________________________________________________________________________________________________________________|            |
 NERVOUS SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Brain                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Granular Cell Tumor Benign           |                                        X                                 |          1 |
      Leukemia Mononuclear                 |                X                                                         |          1 |
 _____________________________________________________________________________________________________________________|            |
 RESPIRATORY SYSTEM                        |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Larynx                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +|  49        |
                                            __________________________________________________________________________|____________|
   Lung                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Alveolar/Bronchiolar Adenoma         |    X                 X     X        X                       X            |         11 |
      Alveolar/Bronchiolar Adenoma,        |                                                                          |            |
 __________________________________________________________________________________________________________________________________ 
                         * : 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: 05072-01                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                                         TETRANITROMETHANE                                     Date: 04/16/97  
Route: RESPIRATORY EXPOSURE WHOLE BODY                                                                            Time: 11:46:05  
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 7| 5| 7| 7| 6| 6| 7| 7| 6| 7| 6| 6| 7| 7| 7| 5| 7| 7| 3| 7| 5| 5| 6| 6| 7|            |
                             DAY ON TEST   | 2| 3| 2| 2| 7| 7| 0| 2| 9| 2| 6| 8| 2| 2| 2| 9| 2| 2| 5| 2| 3| 3| 1| 7| 2|            |
                                           | 8| 5| 8| 8| 5| 4| 7| 8| 9| 6| 1| 1| 9| 9| 9| 1| 9| 9| 3| 9| 5| 3| 9| 5| 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                   | 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|     T      |
                               ANIMAL ID   | 7| 7| 7| 7| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 0|     A      |
    2 PPM                                  | 6| 7| 8| 9| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0|     L      |
                                           | 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|            |
 __________________________________________________________________________________________________________________________________ 
 RESPIRATORY SYSTEM - cont                 |                                                                          |            |
                                           |                                                                          |            |
          Multiple                         |                                                                          |          2 |
      Alveolar/Bronchiolar Carcinoma       |          X     X  X  X           X           X  X                        |         18 |
      Alveolar/Bronchiolar Carcinoma,      |                                                                          |            |
          Multiple                         |                               X                                X         |          4 |
      Alveolar/Bronchiolar Carcinoma, Two  |             X                                                           X|          4 |
      Fibrous Histiocytoma                 |                   X                                                      |          1 |
      Histiocytic Sarcoma                  |                                  X                                       |          1 |
      Leukemia Mononuclear                 | X              X                             X  X                 X     X|         17 |
      Squamous Cell Carcinoma              |                                                          X               |          1 |
      Mediastinum, Leukemia Mononuclear    |                      X                                                   |          1 |
                                            __________________________________________________________________________|____________|
   Nose                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  A  +  +  +  +  +  +|  49        |
                                            __________________________________________________________________________|____________|
   Trachea                                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
 _____________________________________________________________________________________________________________________|            |
 SPECIAL SENSES SYSTEM                     |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Eye                                     |                                                                +     +   |   3        |
                                            __________________________________________________________________________|____________|
   Harderian Gland                         |                                                                          |   1        |
                                            __________________________________________________________________________|____________|
   Lacrimal Gland                          |                                     +                                    |   1        |
                                            __________________________________________________________________________|____________|
   Zymbal's Gland                          | +           +                                                            |   2        |
      Squamous Cell Papilloma              | X           X                                                            |          2 |
 _____________________________________________________________________________________________________________________|            |
 URINARY SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Kidney                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Alveolar/Bronchiolar Carcinoma,      |                                                                          |            |
          Metastatic, Lung                 |                               X                                          |          1 |
      Leukemia Mononuclear                 |                X                             X                           |          2 |
      Bilateral, Alveolar/Bronchiolar      |                                                                          |            |
          Carcinoma, Metastatic, Lung      |                                                                          |          1 |
      Capsule, Histiocytic Sarcoma         |                                  X                                       |          1 |
      Capsule, Mesothelioma Malignant      |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Urinary Bladder                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  A  +  +  +  +  +  +|  49        |
      Mesothelioma Malignant               |                                                                          |          1 |
 __________________________________________________________________________________________________________________________________ 
 SYSTEMIC LESIONS                          |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Multiple Organs                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|  50        |
      Histiocytic Sarcoma                  |                                  X                                       |          1 |
      Leukemia Mononuclear                 | X     X  X  X  X     X              X        X  X        X        X     X|         26 |
      Mesothelioma Malignant               |                                                                          |          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  54                                                               
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NTP is located at the National Institute of Environmental Health Sciences, part of the National Institutes of Health.