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TDMS Study 05217-03 Pathology Tables

NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97
Route: DOSED FEED                                                                                                 Time: 18:00:35

                                                          CORE ANIMALS




       Facility:  Southern Research Institute

       Chemical CAS #:  1948-33-0

       Lock Date:  05/26/93

       Cage Range:  All

       Reasons For Removal:    25019 Moribund Sacrifice                25020 Natural Death
                               25026 Other                             25021 Terminal Sacrifice

       Removal Date Range:     All

       Treatment Groups:       Include All

































Note:  Animals arranged according to CID number

                                                              Page   1


NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 5| 8| 8| 6| 2| 6| 3| 6| 5| 7| 5| 7| 8| 6| 8| 7| 7| 7| 6| 8| 7| 7| 7| 6| 7|             
                             DAY ON TEST   | 7| 9| 8| 4| 9| 2| 0| 9| 7| 7| 4| 1| 5| 1| 0| 9| 2| 6| 2| 9| 3| 6| 2| 3| 3|             
                                           | 8| 8| 8| 9| 7| 8| 2| 0| 9| 8| 0| 2| 4| 3| 2| 6| 4| 1| 7| 8| 6| 6| 2| 8| 3|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   FISCHER 344 RATS FEMALE                 | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
                               ANIMAL ID   | 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3|             
    UNTREATD                               | 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|             
 _____________________________________________________________________________________________________________________|             
 ALIMENTARY SYSTEM                         |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Esophagus                               | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Large, Colon                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Large, Rectum                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Large, Cecum                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Small, Duodenum               | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Small, Jejunum                | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Small, Ileum                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Liver                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X  X  X  X           X           X              X     X     X  X        X|             
                                            __________________________________________________________________________|             
   Mesentery                               |                   +        +  +           +                       +      |             
      Sarcoma Stromal, Metastatic, Uterus  |                   X                                                      |             
                                            __________________________________________________________________________|             
   Pancreas                                | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                  X                                       |             
      Sarcoma Stromal, Metastatic, Uterus  |                   X                                                      |             
                                            __________________________________________________________________________|             
   Salivary Glands                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Stomach, Forestomach                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Stomach, Glandular                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X                                               X                        |             
                                            __________________________________________________________________________|             
   Tongue                                  |    +                                                                     |             
      Squamous Cell Papilloma              |    X                                                                     |             
 _____________________________________________________________________________________________________________________|             
 CARDIOVASCULAR SYSTEM                     |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Blood Vessel                            | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Heart                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             
 ENDOCRINE SYSTEM                          |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Adrenal Cortex                          | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |                                     X                                    |             
      Leukemia Mononuclear                 |    X  X  X           X           X              X     X     X  X        X|             
                                            __________________________________________________________________________|             
   Adrenal Medulla                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |          X                       X                    X                  |             
      Pheochromocytoma Benign              |                                                                          |             
                                            __________________________________________________________________________|             
   Islets, Pancreatic                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |       X                                                                  |             
                                            __________________________________________________________________________|             
   Parathyroid Gland                       | +  +  +  +  +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  M  M  +  +  +  M|             
      Adenoma                              |                                                                          |             
                                            __________________________________________________________________________|             
   Pituitary Gland                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |          X                                      X                        |             
      Pars Distalis, Adenoma               |    X     X              X           X  X  X  X           X     X  X     X|             
      Pars Distalis, Carcinoma             |                               X                                          |             
                                            __________________________________________________________________________|             
   Thyroid Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      C-Cell, Adenoma                      |                                                                         X|             
      C-Cell, Carcinoma                    |                                                                          |             
      Follicular Cell, Carcinoma           |                                                          X               |             
 _____________________________________________________________________________________________________________________|             

                                                             Page   2                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 5| 8| 8| 6| 2| 6| 3| 6| 5| 7| 5| 7| 8| 6| 8| 7| 7| 7| 6| 8| 7| 7| 7| 6| 7|             
                             DAY ON TEST   | 7| 9| 8| 4| 9| 2| 0| 9| 7| 7| 4| 1| 5| 1| 0| 9| 2| 6| 2| 9| 3| 6| 2| 3| 3|             
                                           | 8| 8| 8| 9| 7| 8| 2| 0| 9| 8| 0| 2| 4| 3| 2| 6| 4| 1| 7| 8| 6| 6| 2| 8| 3|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   FISCHER 344 RATS FEMALE                 | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
                               ANIMAL ID   | 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3|             
    UNTREATD                               | 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|             
 _____________________________________________________________________________________________________________________|             
 ENDOCRINE SYSTEM - cont                   |                                                                          |             
                                           |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 GENERAL BODY SYSTEM                       |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Peritoneum                              |                                                                          |             
      Mesothelioma Malignant               |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 GENITAL SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Clitoral Gland                          | +  +  +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |    X                    X                                                |             
      Carcinoma                            |          X                                         X     X               |             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Ovary                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Granulosa Cell Tumor Benign          |                                                                          |             
      Leukemia Mononuclear                 |                                                 X                        |             
                                            __________________________________________________________________________|             
   Uterus                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leiomyoma                            |                                                                          |             
      Leukemia Mononuclear                 |                                  X                                       |             
      Polyp Stromal                        |          X                       X                       X               |             
      Polyp Stromal, Multiple              |                                                                          |             
      Sarcoma Stromal                      |                   X                                                      |             
                                            __________________________________________________________________________|             
   Vagina                                  |          M                       M        M        M              M      |             
 _____________________________________________________________________________________________________________________|             
 HEMATOPOIETIC SYSTEM                      |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Bone Marrow                             | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X  X     X           X                          X           X  X        X|             
                                            __________________________________________________________________________|             
   Lymph Node                              | +     +  +        +  +                          +        +        +      |             
      Leukemia Mononuclear                 |                                                                          |             
      Deep Cervical, Leukemia Mononuclear  |                                                                          |             
      Iliac, Leukemia Mononuclear          |                                                                          |             
      Mediastinal, Leukemia Mononuclear    |          X           X                          X                        |             
      Mediastinal, Mesothelioma Malignant, |                                                                          |             
           Metastatic, Peritoneum          |                                                                          |             
      Pancreatic, Leukemia Mononuclear     |                      X                                                   |             
      Renal, Leukemia Mononuclear          | X                                                                        |             
                                            __________________________________________________________________________|             
   Lymph Node, Mandibular                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X  X     X           X           X              X           X  X        X|             
                                            __________________________________________________________________________|             
   Lymph Node, Mesenteric                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  I  +  +|             
      Leukemia Mononuclear                 | X  X     X                                      X     X     X  X        X|             
                                            __________________________________________________________________________|             
   Spleen                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Hemangiosarcoma                      |                                                                          |             
      Leukemia Mononuclear                 | X  X  X  X           X           X        X     X     X     X  X        X|             
                                            __________________________________________________________________________|             
   Thymus                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  I  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X                                                                        |             
 _____________________________________________________________________________________________________________________|             
 INTEGUMENTARY SYSTEM                      |                                                                          |             
                                           |                                                                          |             
 _____________________________________________________________________________________________________________________|             

                                                             Page   3                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 5| 8| 8| 6| 2| 6| 3| 6| 5| 7| 5| 7| 8| 6| 8| 7| 7| 7| 6| 8| 7| 7| 7| 6| 7|             
                             DAY ON TEST   | 7| 9| 8| 4| 9| 2| 0| 9| 7| 7| 4| 1| 5| 1| 0| 9| 2| 6| 2| 9| 3| 6| 2| 3| 3|             
                                           | 8| 8| 8| 9| 7| 8| 2| 0| 9| 8| 0| 2| 4| 3| 2| 6| 4| 1| 7| 8| 6| 6| 2| 8| 3|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   FISCHER 344 RATS FEMALE                 | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
                               ANIMAL ID   | 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3|             
    UNTREATD                               | 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|             
 _____________________________________________________________________________________________________________________|             
 INTEGUMENTARY SYSTEM - cont               |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Mammary Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |                                        X                                 |             
      Carcinoma                            |                            X                                   X        X|             
      Fibroadenoma                         | X  X  X  X     X     X     X  X     X     X     X  X     X  X     X  X  X|             
      Fibroadenoma, Multiple               |                         X                    X                           |             
                                            __________________________________________________________________________|             
   Skin                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Basal Cell Carcinoma                 |                                                                          |             
      Subcutaneous Tissue, Fibroma         |                      X                                                   |             
      Subcutaneous Tissue, Fibrosarcoma    |                                                                          |             
      Subcutaneous Tissue, Lipoma          |                                     X                                    |             
 _____________________________________________________________________________________________________________________|             
 MUSCULOSKELETAL SYSTEM                    |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Bone                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Skeletal Muscle                         |                   +                                                      |             
      Sarcoma Stromal, Metastatic, Uterus  |                   X                                                      |             
 _____________________________________________________________________________________________________________________|             
 NERVOUS SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Brain                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |          X                                                  X            |             
      Oligodendroglioma Malignant          |                                                                          |             
                                            __________________________________________________________________________|             
   Peripheral Nerve                        |                                                             +            |             
                                            __________________________________________________________________________|             
   Spinal Cord                             |                                                             +            |             
      Leukemia Mononuclear                 |                                                             X            |             
 _____________________________________________________________________________________________________________________|             
 RESPIRATORY SYSTEM                        |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Lung                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Alveolar/Bronchiolar Adenoma         |                                           X                              |             
      Leukemia Mononuclear                 |          X                                      X                       X|             
                                            __________________________________________________________________________|             
   Nose                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Trachea                                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             
 SPECIAL SENSES SYSTEM                     |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Ear                                     |                                                             +            |             
                                            __________________________________________________________________________|             
   Eye                                     |                                           +     +     +                  |             
 _____________________________________________________________________________________________________________________|             
 URINARY SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Kidney                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |    X     X                                      X     X     X  X         |             
      Sarcoma Stromal, Metastatic, Uterus  |                   X                                                      |             
      Renal Tubule, Adenoma                |                                                                          |             
                                            __________________________________________________________________________|             
   Urinary Bladder                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             
 SYSTEMIC LESIONS                          |                                                                          |             
                                            __________________________________________________________________________|             
   Multiple Organs                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X  X  X  X           X           X        X     X     X     X  X        X|             
 _____________________________________________________________________________________________________________________|             

                                                             Page   4                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 5| 8| 8| 6| 2| 6| 3| 6| 5| 7| 5| 7| 8| 6| 8| 7| 7| 7| 6| 8| 7| 7| 7| 6| 7|             
                             DAY ON TEST   | 7| 9| 8| 4| 9| 2| 0| 9| 7| 7| 4| 1| 5| 1| 0| 9| 2| 6| 2| 9| 3| 6| 2| 3| 3|             
                                           | 8| 8| 8| 9| 7| 8| 2| 0| 9| 8| 0| 2| 4| 3| 2| 6| 4| 1| 7| 8| 6| 6| 2| 8| 3|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   FISCHER 344 RATS FEMALE                 | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
                               ANIMAL ID   | 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3|             
    UNTREATD                               | 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|             
 _____________________________________________________________________________________________________________________|             
 SYSTEMIC LESIONS - cont                   |                                                                          |             
                                           |                                                                          |             
      Mesothelioma Malignant               |                                                                          |             
 _____________________________________________________________________________________________________________________|             

                                                             Page   5                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 5| 8| 7| 4| 4| 5| 8| 7| 8| 6| 7| 7| 7| 7| 7| 8| 6| 6| 7| 4| 8| 7| 8| 3| 8|             
                             DAY ON TEST   | 4| 3| 0| 1| 2| 4| 9| 5| 3| 4| 6| 9| 7| 9| 6| 9| 6| 9| 9| 9| 8| 8| 9| 8| 0|             
                                           | 6| 0| 4| 8| 1| 0| 8| 8| 1| 0| 5| 9| 7| 5| 5| 8| 1| 4| 5| 7| 0| 5| 8| 0| 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 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   | 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 4|             
    UNTREATD                               | 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|             
     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|             
 _____________________________________________________________________________________________________________________|             
 ALIMENTARY SYSTEM                         |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Esophagus                               | +  +  +  +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Large, Colon                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Large, Rectum                 | +  +  +  +  +  +  +  M  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Large, Cecum                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Small, Duodenum               | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Small, Jejunum                | +  +  +  +  +  +  M  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Small, Ileum                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Liver                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X           X     X     X     X        X  X        X  X  X     X         |             
                                            __________________________________________________________________________|             
   Mesentery                               |    +     +  +                    +     +                                 |             
      Sarcoma Stromal, Metastatic, Uterus  |                                                                          |             
                                            __________________________________________________________________________|             
   Pancreas                                | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                         X                                                |             
      Sarcoma Stromal, Metastatic, Uterus  |                                                                          |             
                                            __________________________________________________________________________|             
   Salivary Glands                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Stomach, Forestomach                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Stomach, Glandular                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                           X                              |             
                                            __________________________________________________________________________|             
   Tongue                                  |                                                                          |             
      Squamous Cell Papilloma              |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 CARDIOVASCULAR SYSTEM                     |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Blood Vessel                            | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Heart                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             
 ENDOCRINE SYSTEM                          |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Adrenal Cortex                          | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |                                                       X     X            |             
      Leukemia Mononuclear                 |                         X     X        X  X        X     X               |             
                                            __________________________________________________________________________|             
   Adrenal Medulla                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                               X        X  X        X     X               |             
      Pheochromocytoma Benign              |                                                                          |             
                                            __________________________________________________________________________|             
   Islets, Pancreatic                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |                                                 X                        |             
                                            __________________________________________________________________________|             
   Parathyroid Gland                       | +  +  +  +  +  +  +  +  +  +  +  M  +  I  +  +  +  +  +  +  +  +  +  +  M|             
      Adenoma                              |                                                                X         |             
                                            __________________________________________________________________________|             
   Pituitary Gland                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X                       X              X           X     X               |             
      Pars Distalis, Adenoma               |    X           X        X  X     X  X                       X  X        X|             
      Pars Distalis, Carcinoma             |                                           X                              |             
                                            __________________________________________________________________________|             
   Thyroid Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      C-Cell, Adenoma                      |                X  X                                            X         |             
      C-Cell, Carcinoma                    |                                              X                           |             
      Follicular Cell, Carcinoma           |                                                                          |             
 _____________________________________________________________________________________________________________________|             

                                                             Page   6                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 5| 8| 7| 4| 4| 5| 8| 7| 8| 6| 7| 7| 7| 7| 7| 8| 6| 6| 7| 4| 8| 7| 8| 3| 8|             
                             DAY ON TEST   | 4| 3| 0| 1| 2| 4| 9| 5| 3| 4| 6| 9| 7| 9| 6| 9| 6| 9| 9| 9| 8| 8| 9| 8| 0|             
                                           | 6| 0| 4| 8| 1| 0| 8| 8| 1| 0| 5| 9| 7| 5| 5| 8| 1| 4| 5| 7| 0| 5| 8| 0| 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 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   | 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 4|             
    UNTREATD                               | 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|             
     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|             
 _____________________________________________________________________________________________________________________|             
 ENDOCRINE SYSTEM - cont                   |                                                                          |             
                                           |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 GENERAL BODY SYSTEM                       |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Peritoneum                              |                                                                      +   |             
      Mesothelioma Malignant               |                                                                      X   |             
 _____________________________________________________________________________________________________________________|             
 GENITAL SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Clitoral Gland                          | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +|             
      Adenoma                              |                                     X                                    |             
      Carcinoma                            |                                                                          |             
      Leukemia Mononuclear                 |                                        X                                 |             
                                            __________________________________________________________________________|             
   Ovary                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Granulosa Cell Tumor Benign          |                                                                          |             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Uterus                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leiomyoma                            |                                                             X            |             
      Leukemia Mononuclear                 |                                                                          |             
      Polyp Stromal                        |                                        X                                 |             
      Polyp Stromal, Multiple              |                               X                                          |             
      Sarcoma Stromal                      |                                                                          |             
                                            __________________________________________________________________________|             
   Vagina                                  |    M                    M              M                       M         |             
 _____________________________________________________________________________________________________________________|             
 HEMATOPOIETIC SYSTEM                      |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Bone Marrow                             | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X                       X     X        X  X        X                     |             
                                            __________________________________________________________________________|             
   Lymph Node                              |             +           +  +  +        +  +     +  +                 +   |             
      Leukemia Mononuclear                 |                               X           X                              |             
      Deep Cervical, Leukemia Mononuclear  |                                           X                              |             
      Iliac, Leukemia Mononuclear          |                                        X                                 |             
      Mediastinal, Leukemia Mononuclear    |             X           X     X           X                              |             
      Mediastinal, Mesothelioma Malignant, |                                                                          |             
           Metastatic, Peritoneum          |                                                                      X   |             
      Pancreatic, Leukemia Mononuclear     |                         X     X                                          |             
      Renal, Leukemia Mononuclear          |                                                    X                     |             
                                            __________________________________________________________________________|             
   Lymph Node, Mandibular                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X           X           X     X        X  X        X                     |             
                                            __________________________________________________________________________|             
   Lymph Node, Mesenteric                  | +  +  +  +  +  +  +  I  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X           X           X     X        X  X           X                  |             
                                            __________________________________________________________________________|             
   Spleen                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Hemangiosarcoma                      |                                                                   X      |             
      Leukemia Mononuclear                 | X           X     X     X     X        X  X        X  X  X     X         |             
                                            __________________________________________________________________________|             
   Thymus                                  | +  +  +  +  +  +  +  +  +  +  +  I  +  M  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                               X                                          |             
 _____________________________________________________________________________________________________________________|             
 INTEGUMENTARY SYSTEM                      |                                                                          |             
                                           |                                                                          |             
 _____________________________________________________________________________________________________________________|             

                                                             Page   7                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 5| 8| 7| 4| 4| 5| 8| 7| 8| 6| 7| 7| 7| 7| 7| 8| 6| 6| 7| 4| 8| 7| 8| 3| 8|             
                             DAY ON TEST   | 4| 3| 0| 1| 2| 4| 9| 5| 3| 4| 6| 9| 7| 9| 6| 9| 6| 9| 9| 9| 8| 8| 9| 8| 0|             
                                           | 6| 0| 4| 8| 1| 0| 8| 8| 1| 0| 5| 9| 7| 5| 5| 8| 1| 4| 5| 7| 0| 5| 8| 0| 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 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   | 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 4|             
    UNTREATD                               | 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|             
     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|             
 _____________________________________________________________________________________________________________________|             
 INTEGUMENTARY SYSTEM - cont               |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Mammary Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |                         X  X                                             |             
      Carcinoma                            |    X           X           X                          X           X      |             
      Fibroadenoma                         |    X  X              X                    X  X  X              X        X|             
      Fibroadenoma, Multiple               |          X        X     X     X  X                                X      |             
                                            __________________________________________________________________________|             
   Skin                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Basal Cell Carcinoma                 |                            X                                             |             
      Subcutaneous Tissue, Fibroma         |                X                                                         |             
      Subcutaneous Tissue, Fibrosarcoma    |                                                                          |             
      Subcutaneous Tissue, Lipoma          |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 MUSCULOSKELETAL SYSTEM                    |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Bone                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Skeletal Muscle                         |                                                                          |             
      Sarcoma Stromal, Metastatic, Uterus  |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 NERVOUS SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Brain                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                          |             
      Oligodendroglioma Malignant          |                                              X                           |             
                                            __________________________________________________________________________|             
   Peripheral Nerve                        |                                                                          |             
                                            __________________________________________________________________________|             
   Spinal Cord                             |                                                                          |             
      Leukemia Mononuclear                 |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 RESPIRATORY SYSTEM                        |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Lung                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Alveolar/Bronchiolar Adenoma         |                                                                          |             
      Leukemia Mononuclear                 | X                             X        X  X        X  X  X               |             
                                            __________________________________________________________________________|             
   Nose                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Trachea                                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             
 SPECIAL SENSES SYSTEM                     |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Ear                                     |                                                                          |             
                                            __________________________________________________________________________|             
   Eye                                     |                                           +                              |             
 _____________________________________________________________________________________________________________________|             
 URINARY SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Kidney                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                               X        X  X              X               |             
      Sarcoma Stromal, Metastatic, Uterus  |                                                                          |             
      Renal Tubule, Adenoma                |                                                                   X      |             
                                            __________________________________________________________________________|             
   Urinary Bladder                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             
 SYSTEMIC LESIONS                          |                                                                          |             
                                            __________________________________________________________________________|             
   Multiple Organs                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X           X     X     X     X        X  X        X  X  X     X         |             
 _____________________________________________________________________________________________________________________|             

                                                             Page   8                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 5| 8| 7| 4| 4| 5| 8| 7| 8| 6| 7| 7| 7| 7| 7| 8| 6| 6| 7| 4| 8| 7| 8| 3| 8|             
                             DAY ON TEST   | 4| 3| 0| 1| 2| 4| 9| 5| 3| 4| 6| 9| 7| 9| 6| 9| 6| 9| 9| 9| 8| 8| 9| 8| 0|             
                                           | 6| 0| 4| 8| 1| 0| 8| 8| 1| 0| 5| 9| 7| 5| 5| 8| 1| 4| 5| 7| 0| 5| 8| 0| 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 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   | 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 4|             
    UNTREATD                               | 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|             
     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|             
 _____________________________________________________________________________________________________________________|             
 SYSTEMIC LESIONS - cont                   |                                                                          |             
                                           |                                                                          |             
      Mesothelioma Malignant               |                                                                      X   |             
 _____________________________________________________________________________________________________________________|             

                                                             Page   9                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 8| 8| 8| 7| 8| 8| 8| 8| 8| 7|                                            |            |
                             DAY ON TEST   | 9| 9| 5| 3| 5| 9| 9| 7| 9| 8|                                            |            |
                                           | 8| 8| 5| 3| 6| 8| 8| 9| 8| 9|                                            |            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 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|                                            |     T      |
                               ANIMAL ID   | 4| 4| 4| 4| 4| 4| 4| 4| 4| 4|                                            |     A      |
    UNTREATD                               | 0| 0| 0| 0| 0| 0| 0| 0| 0| 1|                                            |     L      |
     CONTROL                               | 1| 2| 3| 4| 5| 6| 7| 8| 9| 0|                                            |            |
 __________________________________________________________________________________________________________________________________ 
 ALIMENTARY SYSTEM                         |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Esophagus                               | +  +  +  I  +  +  +  +  +  +                                             |  58        |
                                            __________________________________________________________________________|____________|
   Intestine Large, Colon                  | +  +  +  +  +  +  +  +  +  +                                             |  60        |
                                            __________________________________________________________________________|____________|
   Intestine Large, Rectum                 | +  +  +  +  +  +  +  +  +  +                                             |  59        |
                                            __________________________________________________________________________|____________|
   Intestine Large, Cecum                  | +  +  +  +  +  +  +  +  +  +                                             |  60        |
                                            __________________________________________________________________________|____________|
   Intestine Small, Duodenum               | +  +  +  +  +  +  +  +  +  +                                             |  59        |
                                            __________________________________________________________________________|____________|
   Intestine Small, Jejunum                | +  +  +  +  +  +  +  +  +  +                                             |  59        |
                                            __________________________________________________________________________|____________|
   Intestine Small, Ileum                  | +  +  +  +  +  +  +  +  +  +                                             |  60        |
                                            __________________________________________________________________________|____________|
   Liver                                   | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 |                X  X     X  X                                             |         26 |
                                            __________________________________________________________________________|____________|
   Mesentery                               |                      +                                                   |  11        |
      Sarcoma Stromal, Metastatic, Uterus  |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Pancreas                                | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 |                                                                          |          2 |
      Sarcoma Stromal, Metastatic, Uterus  |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Salivary Glands                         | +  +  +  +  +  +  +  +  +  +                                             |  60        |
                                            __________________________________________________________________________|____________|
   Stomach, Forestomach                    | +  +  +  +  +  +  +  +  +  +                                             |  60        |
                                            __________________________________________________________________________|____________|
   Stomach, Glandular                      | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 |                                                                          |          3 |
                                            __________________________________________________________________________|____________|
   Tongue                                  |                                                                          |   1        |
      Squamous Cell Papilloma              |                                                                          |          1 |
 _____________________________________________________________________________________________________________________|            |
 CARDIOVASCULAR SYSTEM                     |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Blood Vessel                            | +  +  +  +  +  +  +  +  +  +                                             |  60        |
                                            __________________________________________________________________________|____________|
   Heart                                   | +  +  +  +  +  +  +  +  +  +                                             |  60        |
 _____________________________________________________________________________________________________________________|            |
 ENDOCRINE SYSTEM                          |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Adrenal Cortex                          | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Adenoma                              |                X                                                         |          4 |
      Leukemia Mononuclear                 |                   X        X                                             |         18 |
                                            __________________________________________________________________________|____________|
   Adrenal Medulla                         | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 |                            X                                             |          9 |
      Pheochromocytoma Benign              |             X     X                                                      |          2 |
                                            __________________________________________________________________________|____________|
   Islets, Pancreatic                      | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Adenoma                              |                                                                          |          2 |
                                            __________________________________________________________________________|____________|
   Parathyroid Gland                       | +  +  +  +  +  +  M  +  +  +                                             |  52        |
      Adenoma                              |                            X                                             |          2 |
                                            __________________________________________________________________________|____________|
   Pituitary Gland                         | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 |                                                                          |          7 |
      Pars Distalis, Adenoma               | X     X     X     X  X  X                                                |         26 |
 __________________________________________________________________________________________________________________________________ 

                         * : 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  10                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 8| 8| 8| 7| 8| 8| 8| 8| 8| 7|                                            |            |
                             DAY ON TEST   | 9| 9| 5| 3| 5| 9| 9| 7| 9| 8|                                            |            |
                                           | 8| 8| 5| 3| 6| 8| 8| 9| 8| 9|                                            |            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 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|                                            |     T      |
                               ANIMAL ID   | 4| 4| 4| 4| 4| 4| 4| 4| 4| 4|                                            |     A      |
    UNTREATD                               | 0| 0| 0| 0| 0| 0| 0| 0| 0| 1|                                            |     L      |
     CONTROL                               | 1| 2| 3| 4| 5| 6| 7| 8| 9| 0|                                            |            |
 __________________________________________________________________________________________________________________________________ 
 ENDOCRINE SYSTEM - cont                   |                                                                          |            |
                                           |                                                                          |            |
      Pars Distalis, Carcinoma             |                                                                          |          2 |
                                            __________________________________________________________________________|____________|
   Thyroid Gland                           | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      C-Cell, Adenoma                      |    X           X        X                                                |          7 |
      C-Cell, Carcinoma                    |                                                                          |          1 |
      Follicular Cell, Carcinoma           |                                                                          |          1 |
 _____________________________________________________________________________________________________________________|            |
 GENERAL BODY SYSTEM                       |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Peritoneum                              |                                                                          |   1        |
      Mesothelioma Malignant               |                                                                          |          1 |
 _____________________________________________________________________________________________________________________|            |
 GENITAL SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Clitoral Gland                          | +  +  +  +  +  +  +  +  +  +                                             |  58        |
      Adenoma                              |       X           X     X                                                |          6 |
      Carcinoma                            | X  X           X                                                         |          6 |
      Leukemia Mononuclear                 |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Ovary                                   | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Granulosa Cell Tumor Benign          |                      X                                                   |          1 |
      Leukemia Mononuclear                 |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Uterus                                  | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leiomyoma                            |                                                                          |          1 |
      Leukemia Mononuclear                 |                                                                          |          1 |
      Polyp Stromal                        |          X           X                                                   |          6 |
      Polyp Stromal, Multiple              |                                                                          |          1 |
      Sarcoma Stromal                      |             X                                                            |          2 |
                                            __________________________________________________________________________|____________|
   Vagina                                  |                   M        M                                             |            |
 _____________________________________________________________________________________________________________________|            |
 HEMATOPOIETIC SYSTEM                      |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Bone Marrow                             | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 |                X  X        X                                             |         17 |
                                            __________________________________________________________________________|____________|
   Lymph Node                              |       +        +        +                                                |  20        |
      Leukemia Mononuclear                 |                                                                          |          2 |
      Deep Cervical, Leukemia Mononuclear  |                                                                          |          1 |
      Iliac, Leukemia Mononuclear          |                X                                                         |          2 |
      Mediastinal, Leukemia Mononuclear    |                X        X                                                |          9 |
      Mediastinal, Mesothelioma Malignant, |                                                                          |            |
           Metastatic, Peritoneum          |                                                                          |          1 |
      Pancreatic, Leukemia Mononuclear     |                                                                          |          3 |
      Renal, Leukemia Mononuclear          |                                                                          |          2 |
                                            __________________________________________________________________________|____________|
   Lymph Node, Mandibular                  | +  M  +  +  +  +  +  +  +  +                                             |  59        |
 __________________________________________________________________________________________________________________________________ 

                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  

                                                             Page  11                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 8| 8| 8| 7| 8| 8| 8| 8| 8| 7|                                            |            |
                             DAY ON TEST   | 9| 9| 5| 3| 5| 9| 9| 7| 9| 8|                                            |            |
                                           | 8| 8| 5| 3| 6| 8| 8| 9| 8| 9|                                            |            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 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|                                            |     T      |
                               ANIMAL ID   | 4| 4| 4| 4| 4| 4| 4| 4| 4| 4|                                            |     A      |
    UNTREATD                               | 0| 0| 0| 0| 0| 0| 0| 0| 0| 1|                                            |     L      |
     CONTROL                               | 1| 2| 3| 4| 5| 6| 7| 8| 9| 0|                                            |            |
 __________________________________________________________________________________________________________________________________ 
 HEMATOPOIETIC SYSTEM - cont               |                                                                          |            |
                                           |                                                                          |            |
      Leukemia Mononuclear                 |                X        X  X                                             |         19 |
                                            __________________________________________________________________________|____________|
   Lymph Node, Mesenteric                  | +  +  +  +  +  +  +  +  +  +                                             |  58        |
      Leukemia Mononuclear                 |                X        X  X                                             |         18 |
                                            __________________________________________________________________________|____________|
   Spleen                                  | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Hemangiosarcoma                      |                                                                          |          1 |
      Leukemia Mononuclear                 |                X  X     X  X                                             |         27 |
                                            __________________________________________________________________________|____________|
   Thymus                                  | +  +  +  +  M  +  +  +  +  +                                             |  56        |
      Leukemia Mononuclear                 |                                                                          |          2 |
 _____________________________________________________________________________________________________________________|            |
 INTEGUMENTARY SYSTEM                      |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Mammary Gland                           | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Adenoma                              |                                                                          |          3 |
      Carcinoma                            |                                                                          |          8 |
      Fibroadenoma                         |    X     X           X                                                   |         28 |
      Fibroadenoma, Multiple               | X     X     X  X  X     X  X                                             |         15 |
                                            __________________________________________________________________________|____________|
   Skin                                    | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Basal Cell Carcinoma                 |                                                                          |          1 |
      Subcutaneous Tissue, Fibroma         |                         X                                                |          3 |
      Subcutaneous Tissue, Fibrosarcoma    |             X                                                            |          1 |
      Subcutaneous Tissue, Lipoma          |                                                                          |          1 |
 _____________________________________________________________________________________________________________________|            |
 MUSCULOSKELETAL SYSTEM                    |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Bone                                    | +  +  +  +  +  +  +  +  +  +                                             |  60        |
                                            __________________________________________________________________________|____________|
   Skeletal Muscle                         |                                                                          |   1        |
      Sarcoma Stromal, Metastatic, Uterus  |                                                                          |          1 |
 _____________________________________________________________________________________________________________________|            |
 NERVOUS SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Brain                                   | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 |                                                                          |          2 |
      Oligodendroglioma Malignant          |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Peripheral Nerve                        |       +                                                                  |   2        |
                                            __________________________________________________________________________|____________|
   Spinal Cord                             |       +                                                                  |   2        |
      Leukemia Mononuclear                 |                                                                          |          1 |
 _____________________________________________________________________________________________________________________|            |
 RESPIRATORY SYSTEM                        |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Lung                                    | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Alveolar/Bronchiolar Adenoma         |                   X                                                      |          2 |
      Leukemia Mononuclear                 |                            X                                             |         11 |
                                            __________________________________________________________________________|____________|
   Nose                                    | +  +  +  +  +  +  +  +  +  +                                             |  60        |
 __________________________________________________________________________________________________________________________________ 

                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  

                                                             Page  12                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 8| 8| 8| 7| 8| 8| 8| 8| 8| 7|                                            |            |
                             DAY ON TEST   | 9| 9| 5| 3| 5| 9| 9| 7| 9| 8|                                            |            |
                                           | 8| 8| 5| 3| 6| 8| 8| 9| 8| 9|                                            |            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 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|                                            |     T      |
                               ANIMAL ID   | 4| 4| 4| 4| 4| 4| 4| 4| 4| 4|                                            |     A      |
    UNTREATD                               | 0| 0| 0| 0| 0| 0| 0| 0| 0| 1|                                            |     L      |
     CONTROL                               | 1| 2| 3| 4| 5| 6| 7| 8| 9| 0|                                            |            |
 __________________________________________________________________________________________________________________________________ 
 RESPIRATORY SYSTEM - cont                 |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Trachea                                 | +  +  +  +  +  +  +  +  +  +                                             |  60        |
 _____________________________________________________________________________________________________________________|            |
 SPECIAL SENSES SYSTEM                     |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Ear                                     |                                                                          |   1        |
                                            __________________________________________________________________________|____________|
   Eye                                     |                                                                          |   4        |
 _____________________________________________________________________________________________________________________|            |
 URINARY SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Kidney                                  | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 |                   X        X                                             |         12 |
      Sarcoma Stromal, Metastatic, Uterus  |                                                                          |          1 |
      Renal Tubule, Adenoma                |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Urinary Bladder                         | +  +  +  +  +  +  +  +  +  +                                             |  59        |
 __________________________________________________________________________________________________________________________________ 
 SYSTEMIC LESIONS                          |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Multiple Organs                         | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 |                X  X     X  X                                             |         27 |
      Mesothelioma Malignant               |                                                                          |          1 |
 __________________________________________________________________________________________________________________________________ 

                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  

                                                             Page  13                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 4| 8| 4| 7| 8| 7| 8| 8| 7| 6| 7| 7| 4| 8| 6| 8| 5| 7| 5| 6| 8| 8| 8| 8| 6|             
                             DAY ON TEST   | 8| 9| 8| 2| 4| 9| 9| 0| 8| 5| 6| 3| 9| 9| 2| 6| 8| 9| 3| 6| 3| 7| 3| 9| 6|             
                                           | 1| 8| 0| 2| 5| 9| 8| 6| 1| 6| 1| 3| 8| 8| 5| 3| 3| 5| 7| 8| 1| 3| 4| 8| 6|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   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   | 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4|             
    0.125%                                 | 2| 2| 2| 2| 2| 2| 2| 2| 2| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 4| 4| 4| 4| 4| 4|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 ALIMENTARY SYSTEM                         |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Esophagus                               | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Large, Colon                  | +  +  M  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Intestine Large, Rectum                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Intestine Large, Cecum                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Intestine Small, Duodenum               | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Small, Jejunum                | +  +  M  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Intestine Small, Ileum                  | +  +  M  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                             X            |             
                                            __________________________________________________________________________|             
   Liver                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Hepatocellular Adenoma               |                                                                          |             
      Leukemia Mononuclear                 | X  X                 X  X  X                 X  X        X  X  X  X  X   |             
                                            __________________________________________________________________________|             
   Mesentery                               |                +     +                 +           +           +     +   |             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Pancreas                                | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                         X                       X           X  X  X      |             
                                            __________________________________________________________________________|             
   Salivary Glands                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Stomach, Forestomach                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X                                                                 X      |             
                                            __________________________________________________________________________|             
   Stomach, Glandular                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                             X            |             
                                            __________________________________________________________________________|             
   Tongue                                  |                                                                +         |             
      Squamous Cell Papilloma              |                                                                X         |             
 _____________________________________________________________________________________________________________________|             
 CARDIOVASCULAR SYSTEM                     |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Blood Vessel                            | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Heart                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                         X                                   X     X      |             
      Schwannoma Benign                    |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 ENDOCRINE SYSTEM                          |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Adrenal Cortex                          | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |                                                    X                     |             
      Leukemia Mononuclear                 | X  X                    X                    X  X        X  X     X      |             
                                            __________________________________________________________________________|             
   Adrenal Medulla                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X                       X                       X        X  X     X      |             
      Pheochromocytoma Benign              |                                                                          |             
                                            __________________________________________________________________________|             
   Islets, Pancreatic                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |                                                       X                  |             
                                            __________________________________________________________________________|             
   Parathyroid Gland                       | +  +  +  +  +  +  +  M  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             

                                                             Page  14                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 4| 8| 4| 7| 8| 7| 8| 8| 7| 6| 7| 7| 4| 8| 6| 8| 5| 7| 5| 6| 8| 8| 8| 8| 6|             
                             DAY ON TEST   | 8| 9| 8| 2| 4| 9| 9| 0| 8| 5| 6| 3| 9| 9| 2| 6| 8| 9| 3| 6| 3| 7| 3| 9| 6|             
                                           | 1| 8| 0| 2| 5| 9| 8| 6| 1| 6| 1| 3| 8| 8| 5| 3| 3| 5| 7| 8| 1| 3| 4| 8| 6|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   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   | 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4|             
    0.125%                                 | 2| 2| 2| 2| 2| 2| 2| 2| 2| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 4| 4| 4| 4| 4| 4|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 ENDOCRINE SYSTEM - cont                   |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Pituitary Gland                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X                       X                                   X  X  X      |             
      Pars Distalis, Adenoma               |    X  X  X  X     X  X        X  X        X           X        X  X  X   |             
      Pars Distalis, Carcinoma             |                                        X                                 |             
                                            __________________________________________________________________________|             
   Thyroid Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                          |             
      C-Cell, Adenoma                      |                               X              X                    X      |             
 _____________________________________________________________________________________________________________________|             
 GENERAL BODY SYSTEM                       |                                                                          |             
                                           |                                                                          |             
    None                                   |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 GENITAL SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Clitoral Gland                          | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |             X                                      X                     |             
      Carcinoma                            |                                                                         X|             
      Leukemia Mononuclear                 | X                                                                 X      |             
                                            __________________________________________________________________________|             
   Ovary                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Granulosa Cell Tumor Malignant       |                                                                          |             
      Granulosa Cell Tumor Benign          |                      X                                                   |             
      Leukemia Mononuclear                 |                                                 X                        |             
                                            __________________________________________________________________________|             
   Uterus                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leiomyoma                            |                                                                          |             
      Leukemia Mononuclear                 | X                                            X  X           X     X      |             
      Polyp Stromal                        |                                                 X           X           X|             
      Sarcoma Stromal                      |                                                                          |             
                                            __________________________________________________________________________|             
   Vagina                                  |             M                                M  M     M     M     M      |             
 _____________________________________________________________________________________________________________________|             
 HEMATOPOIETIC SYSTEM                      |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Bone Marrow                             | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X                    X  X  X                 X  X        X  X  X  X  X   |             
                                            __________________________________________________________________________|             
   Lymph Node                              | +  +                 +  +                    +  +        +  +  +  +  +   |             
      Leukemia Mononuclear                 |                                                                          |             
      Deep Cervical, Leukemia Mononuclear  |                                                                   X      |             
      Iliac, Leukemia Mononuclear          |                                                                   X      |             
      Inguinal, Leukemia Mononuclear       |                                                                          |             
      Mediastinal, Leukemia Mononuclear    | X  X                 X  X                    X           X  X  X  X      |             
      Pancreatic, Leukemia Mononuclear     |                         X                    X  X        X        X  X   |             
      Popliteal, Leukemia Mononuclear      |                                                                          |             
      Renal, Leukemia Mononuclear          |                         X                                         X      |             
      Thoracic, Leukemia Mononuclear       |                                                                          |             
                                            __________________________________________________________________________|             
   Lymph Node, Mandibular                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X  X                    X                    X  X        X  X  X  X  X   |             
                                            __________________________________________________________________________|             
   Lymph Node, Mesenteric                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X  X                    X                       X        X  X  X  X      |             
 _____________________________________________________________________________________________________________________|             

                                                             Page  15                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 4| 8| 4| 7| 8| 7| 8| 8| 7| 6| 7| 7| 4| 8| 6| 8| 5| 7| 5| 6| 8| 8| 8| 8| 6|             
                             DAY ON TEST   | 8| 9| 8| 2| 4| 9| 9| 0| 8| 5| 6| 3| 9| 9| 2| 6| 8| 9| 3| 6| 3| 7| 3| 9| 6|             
                                           | 1| 8| 0| 2| 5| 9| 8| 6| 1| 6| 1| 3| 8| 8| 5| 3| 3| 5| 7| 8| 1| 3| 4| 8| 6|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   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   | 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4|             
    0.125%                                 | 2| 2| 2| 2| 2| 2| 2| 2| 2| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 4| 4| 4| 4| 4| 4|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 HEMATOPOIETIC SYSTEM - cont               |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Spleen                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X  X                 X  X  X                 X  X        X  X  X  X  X   |             
                                            __________________________________________________________________________|             
   Thymus                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                              X              X  X  X      |             
 _____________________________________________________________________________________________________________________|             
 INTEGUMENTARY SYSTEM                      |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Mammary Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Carcinoma                            |    X        X                                                        X   |             
      Fibroadenoma                         |    X        X        X  X                             X     X        X  X|             
      Fibroadenoma, Multiple               |                X  X           X  X     X     X     X           X  X      |             
                                            __________________________________________________________________________|             
   Skin                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Basal Cell Carcinoma                 |                                                                          |             
      Subcutaneous Tissue, Fibroma         |    X                                X                                    |             
      Subcutaneous Tissue, Fibroma,        |                                                                          |             
          Multiple                         |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 MUSCULOSKELETAL SYSTEM                    |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Bone                                    | +  +  +  +  +  +  +  +  +  +  +  +  I  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Skeletal Muscle                         |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 NERVOUS SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Brain                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                X  X      |             
                                            __________________________________________________________________________|             
   Peripheral Nerve                        |                                                                          |             
                                            __________________________________________________________________________|             
   Spinal Cord                             |       +                                                                  |             
 _____________________________________________________________________________________________________________________|             
 RESPIRATORY SYSTEM                        |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Lung                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Alveolar/Bronchiolar Adenoma         |                                                                          |             
      Alveolar/Bronchiolar Carcinoma       |                                                             X            |             
      Leukemia Mononuclear                 | X                       X  X                 X  X        X  X     X      |             
                                            __________________________________________________________________________|             
   Nose                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Trachea                                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             
 SPECIAL SENSES SYSTEM                     |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Ear                                     |                                                                          |             
                                            __________________________________________________________________________|             
   Eye                                     |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 URINARY SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Kidney                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X  X                    X                                X  X  X  X      |             
                                            __________________________________________________________________________|             
   Urinary Bladder                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                         X                       X                        |             
 _____________________________________________________________________________________________________________________|             
 SYSTEMIC LESIONS                          |                                                                          |             
                                            __________________________________________________________________________|             
   Multiple Organs                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             

                                                             Page  16                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 4| 8| 4| 7| 8| 7| 8| 8| 7| 6| 7| 7| 4| 8| 6| 8| 5| 7| 5| 6| 8| 8| 8| 8| 6|             
                             DAY ON TEST   | 8| 9| 8| 2| 4| 9| 9| 0| 8| 5| 6| 3| 9| 9| 2| 6| 8| 9| 3| 6| 3| 7| 3| 9| 6|             
                                           | 1| 8| 0| 2| 5| 9| 8| 6| 1| 6| 1| 3| 8| 8| 5| 3| 3| 5| 7| 8| 1| 3| 4| 8| 6|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   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   | 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4|             
    0.125%                                 | 2| 2| 2| 2| 2| 2| 2| 2| 2| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 4| 4| 4| 4| 4| 4|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 SYSTEMIC LESIONS - cont                   |                                                                          |             
                                           |                                                                          |             
      Leukemia Mononuclear                 | X  X                 X  X  X                 X  X        X  X  X  X  X   |             
 _____________________________________________________________________________________________________________________|             

                                                             Page  17                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 5| 7| 6| 6| 7| 8| 8| 8| 8| 8| 8| 8| 7| 8| 7| 5| 6| 7| 8| 8| 7| 7| 8| 8| 6|             
                             DAY ON TEST   | 7| 7| 4| 6| 3| 9| 9| 9| 6| 9| 9| 0| 9| 5| 3| 3| 9| 3| 9| 9| 4| 8| 9| 0| 2|             
                                           | 6| 4| 9| 9| 8| 8| 8| 8| 2| 8| 8| 6| 2| 9| 5| 7| 7| 6| 0| 8| 9| 9| 7| 7| 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                 | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
                               ANIMAL ID   | 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4|             
    0.125%                                 | 4| 4| 4| 4| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 7|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 ALIMENTARY SYSTEM                         |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Esophagus                               | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Large, Colon                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                    X              X     X|             
                                            __________________________________________________________________________|             
   Intestine Large, Rectum                 | +  +  +  +  +  +  +  I  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                   X      |             
                                            __________________________________________________________________________|             
   Intestine Large, Cecum                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                    X                    X|             
                                            __________________________________________________________________________|             
   Intestine Small, Duodenum               | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Small, Jejunum                | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                         X|             
                                            __________________________________________________________________________|             
   Intestine Small, Ileum                  | +  +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                    X                    X|             
                                            __________________________________________________________________________|             
   Liver                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Hepatocellular Adenoma               |                                                 X                        |             
      Leukemia Mononuclear                 |       X     X        X           X     X  X     X  X  X     X  X  X  X  X|             
                                            __________________________________________________________________________|             
   Mesentery                               |       +                                            +  +  +              +|             
      Leukemia Mononuclear                 |                                                    X  X                  |             
                                            __________________________________________________________________________|             
   Pancreas                                | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                    X  X        X  X  X  X|             
                                            __________________________________________________________________________|             
   Salivary Glands                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                   X      |             
                                            __________________________________________________________________________|             
   Stomach, Forestomach                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                    X              X  X  X|             
                                            __________________________________________________________________________|             
   Stomach, Glandular                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                    X                    X|             
                                            __________________________________________________________________________|             
   Tongue                                  |                                                                          |             
      Squamous Cell Papilloma              |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 CARDIOVASCULAR SYSTEM                     |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Blood Vessel                            | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Heart                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |       X                          X                    X           X     X|             
      Schwannoma Benign                    |                         X                                                |             
 _____________________________________________________________________________________________________________________|             
 ENDOCRINE SYSTEM                          |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Adrenal Cortex                          | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |                                                                          |             
      Leukemia Mononuclear                 |       X     X        X           X        X     X  X  X     X  X  X     X|             
                                            __________________________________________________________________________|             
   Adrenal Medulla                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |       X     X        X           X        X     X  X  X     X  X  X      |             
      Pheochromocytoma Benign              |                                                          X               |             
                                            __________________________________________________________________________|             
   Islets, Pancreatic                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  M  +  +  +  +|             
      Adenoma                              |                                                                          |             
                                            __________________________________________________________________________|             
   Parathyroid Gland                       | +  +  +  +  +  M  +  +  +  +  +  +  M  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             

                                                             Page  18                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 5| 7| 6| 6| 7| 8| 8| 8| 8| 8| 8| 8| 7| 8| 7| 5| 6| 7| 8| 8| 7| 7| 8| 8| 6|             
                             DAY ON TEST   | 7| 7| 4| 6| 3| 9| 9| 9| 6| 9| 9| 0| 9| 5| 3| 3| 9| 3| 9| 9| 4| 8| 9| 0| 2|             
                                           | 6| 4| 9| 9| 8| 8| 8| 8| 2| 8| 8| 6| 2| 9| 5| 7| 7| 6| 0| 8| 9| 9| 7| 7| 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                 | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
                               ANIMAL ID   | 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4|             
    0.125%                                 | 4| 4| 4| 4| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 7|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 ENDOCRINE SYSTEM - cont                   |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Pituitary Gland                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |             X        X                    X        X  X           X     X|             
      Pars Distalis, Adenoma               |                X        X        X     X     X              X  X     X   |             
      Pars Distalis, Carcinoma             |                                                                          |             
                                            __________________________________________________________________________|             
   Thyroid Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                   X      |             
      C-Cell, Adenoma                      |          X              X              X                             X   |             
 _____________________________________________________________________________________________________________________|             
 GENERAL BODY SYSTEM                       |                                                                          |             
                                           |                                                                          |             
    None                                   |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 GENITAL SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Clitoral Gland                          | +  +  +  +  +  +  M  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |       X                 X        X     X                                 |             
      Carcinoma                            |          X                                      X                        |             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Ovary                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Granulosa Cell Tumor Malignant       |                                                                          |             
      Granulosa Cell Tumor Benign          |                                                                          |             
      Leukemia Mononuclear                 |                                                       X           X  X   |             
                                            __________________________________________________________________________|             
   Uterus                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leiomyoma                            |                                                                          |             
      Leukemia Mononuclear                 |                                                    X  X           X  X  X|             
      Polyp Stromal                        | X                    X  X                                            X  X|             
      Sarcoma Stromal                      |          X                                                               |             
                                            __________________________________________________________________________|             
   Vagina                                  |                            M     M           M     M  M        M  M     M|             
 _____________________________________________________________________________________________________________________|             
 HEMATOPOIETIC SYSTEM                      |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Bone Marrow                             | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |       X     X                    X        X     X  X  X        X  X  X  X|             
                                            __________________________________________________________________________|             
   Lymph Node                              |       +  +  +        +                             +           +  +     +|             
      Leukemia Mononuclear                 |       X                                            X              X     X|             
      Deep Cervical, Leukemia Mononuclear  |                                                    X              X     X|             
      Iliac, Leukemia Mononuclear          |                                                    X              X     X|             
      Inguinal, Leukemia Mononuclear       |                                                    X              X     X|             
      Mediastinal, Leukemia Mononuclear    |                                                    X           X  X      |             
      Pancreatic, Leukemia Mononuclear     |       X     X                                      X              X     X|             
      Popliteal, Leukemia Mononuclear      |                                                    X              X      |             
      Renal, Leukemia Mononuclear          |             X        X                             X              X     X|             
      Thoracic, Leukemia Mononuclear       |                                                                   X      |             
                                            __________________________________________________________________________|             
   Lymph Node, Mandibular                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |       X     X        X           X        X     X  X  X     X  X  X     X|             
                                            __________________________________________________________________________|             
   Lymph Node, Mesenteric                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |       X     X                    X        X        X  X     X  X  X     X|             
 _____________________________________________________________________________________________________________________|             

                                                             Page  19                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 5| 7| 6| 6| 7| 8| 8| 8| 8| 8| 8| 8| 7| 8| 7| 5| 6| 7| 8| 8| 7| 7| 8| 8| 6|             
                             DAY ON TEST   | 7| 7| 4| 6| 3| 9| 9| 9| 6| 9| 9| 0| 9| 5| 3| 3| 9| 3| 9| 9| 4| 8| 9| 0| 2|             
                                           | 6| 4| 9| 9| 8| 8| 8| 8| 2| 8| 8| 6| 2| 9| 5| 7| 7| 6| 0| 8| 9| 9| 7| 7| 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                 | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
                               ANIMAL ID   | 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4|             
    0.125%                                 | 4| 4| 4| 4| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 7|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 HEMATOPOIETIC SYSTEM - cont               |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Spleen                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |       X     X        X           X     X  X     X  X  X     X  X  X  X  X|             
                                            __________________________________________________________________________|             
   Thymus                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                      X           X                 X              X  X  X|             
 _____________________________________________________________________________________________________________________|             
 INTEGUMENTARY SYSTEM                      |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Mammary Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +  +  +  +|             
      Carcinoma                            |                      X                                                   |             
      Fibroadenoma                         | X              X     X  X                          X                 X   |             
      Fibroadenoma, Multiple               |                   X        X  X        X                       X  X      |             
                                            __________________________________________________________________________|             
   Skin                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Basal Cell Carcinoma                 |                                                                      X   |             
      Subcutaneous Tissue, Fibroma         |                                                                          |             
      Subcutaneous Tissue, Fibroma,        |                                                                          |             
          Multiple                         |    X                                                                     |             
 _____________________________________________________________________________________________________________________|             
 MUSCULOSKELETAL SYSTEM                    |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Bone                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Skeletal Muscle                         |          +                                                               |             
 _____________________________________________________________________________________________________________________|             
 NERVOUS SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Brain                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                    X                    X|             
                                            __________________________________________________________________________|             
   Peripheral Nerve                        |                                                       +                  |             
                                            __________________________________________________________________________|             
   Spinal Cord                             |                                                       +                  |             
 _____________________________________________________________________________________________________________________|             
 RESPIRATORY SYSTEM                        |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Lung                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Alveolar/Bronchiolar Adenoma         |                X              X                                          |             
      Alveolar/Bronchiolar Carcinoma       |                                                                          |             
      Leukemia Mononuclear                 |             X                    X        X     X  X  X     X  X  X      |             
                                            __________________________________________________________________________|             
   Nose                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Trachea                                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             
 SPECIAL SENSES SYSTEM                     |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Ear                                     |                                                                          |             
                                            __________________________________________________________________________|             
   Eye                                     |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 URINARY SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Kidney                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |       X     X                    X        X        X  X        X  X     X|             
                                            __________________________________________________________________________|             
   Urinary Bladder                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                       X              X  X|             
 _____________________________________________________________________________________________________________________|             
 SYSTEMIC LESIONS                          |                                                                          |             
                                            __________________________________________________________________________|             
   Multiple Organs                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             

                                                             Page  20                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 5| 7| 6| 6| 7| 8| 8| 8| 8| 8| 8| 8| 7| 8| 7| 5| 6| 7| 8| 8| 7| 7| 8| 8| 6|             
                             DAY ON TEST   | 7| 7| 4| 6| 3| 9| 9| 9| 6| 9| 9| 0| 9| 5| 3| 3| 9| 3| 9| 9| 4| 8| 9| 0| 2|             
                                           | 6| 4| 9| 9| 8| 8| 8| 8| 2| 8| 8| 6| 2| 9| 5| 7| 7| 6| 0| 8| 9| 9| 7| 7| 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                 | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
                               ANIMAL ID   | 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4|             
    0.125%                                 | 4| 4| 4| 4| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 7|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 SYSTEMIC LESIONS - cont                   |                                                                          |             
                                           |                                                                          |             
      Leukemia Mononuclear                 |       X     X        X           X     X  X     X  X  X     X  X  X  X  X|             
 _____________________________________________________________________________________________________________________|             

                                                             Page  21                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 7| 8| 8| 7| 6| 8| 8| 6| 6| 6|                                            |            |
                             DAY ON TEST   | 0| 1| 9| 0| 4| 3| 9| 5| 1| 8|                                            |            |
                                           | 5| 0| 8| 5| 0| 1| 4| 9| 8| 3|                                            |            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 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|                                            |     T      |
                               ANIMAL ID   | 4| 4| 4| 4| 4| 4| 4| 4| 4| 4|                                            |     A      |
    0.125%                                 | 7| 7| 7| 7| 7| 7| 7| 7| 7| 8|                                            |     L      |
                                           | 1| 2| 3| 4| 5| 6| 7| 8| 9| 0|                                            |            |
 __________________________________________________________________________________________________________________________________ 
 ALIMENTARY SYSTEM                         |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Esophagus                               | +  +  +  +  +  +  +  +  +  +                                             |  60        |
                                            __________________________________________________________________________|____________|
   Intestine Large, Colon                  | +  +  +  +  +  +  +  +  +  +                                             |  59        |
      Leukemia Mononuclear                 |                                                                          |          3 |
                                            __________________________________________________________________________|____________|
   Intestine Large, Rectum                 | +  +  +  +  +  +  +  +  +  +                                             |  59        |
      Leukemia Mononuclear                 |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Intestine Large, Cecum                  | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 |                                                                          |          2 |
                                            __________________________________________________________________________|____________|
   Intestine Small, Duodenum               | +  +  +  +  +  +  +  +  +  +                                             |  60        |
                                            __________________________________________________________________________|____________|
   Intestine Small, Jejunum                | +  +  +  +  +  +  +  +  +  +                                             |  59        |
      Leukemia Mononuclear                 |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Intestine Small, Ileum                  | +  +  +  +  +  +  +  +  +  +                                             |  58        |
      Leukemia Mononuclear                 |                                                                          |          3 |
                                            __________________________________________________________________________|____________|
   Liver                                   | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Hepatocellular Adenoma               |                                                                          |          1 |
      Leukemia Mononuclear                 | X     X  X     X  X  X     X                                             |         33 |
                                            __________________________________________________________________________|____________|
   Mesentery                               |                +        +                                                |  13        |
      Leukemia Mononuclear                 |                                                                          |          2 |
                                            __________________________________________________________________________|____________|
   Pancreas                                | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 | X                                                                        |         12 |
                                            __________________________________________________________________________|____________|
   Salivary Glands                         | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 | X                                                                        |          2 |
                                            __________________________________________________________________________|____________|
   Stomach, Forestomach                    | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 | X                                                                        |          7 |
                                            __________________________________________________________________________|____________|
   Stomach, Glandular                      | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 | X                                                                        |          4 |
                                            __________________________________________________________________________|____________|
   Tongue                                  |                                                                          |   1        |
      Squamous Cell Papilloma              |                                                                          |          1 |
 _____________________________________________________________________________________________________________________|            |
 CARDIOVASCULAR SYSTEM                     |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Blood Vessel                            | +  +  +  +  +  +  +  +  +  +                                             |  60        |
                                            __________________________________________________________________________|____________|
   Heart                                   | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 | X                                                                        |          9 |
      Schwannoma Benign                    |                                                                          |          1 |
 _____________________________________________________________________________________________________________________|            |
 ENDOCRINE SYSTEM                          |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Adrenal Cortex                          | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Adenoma                              |                                                                          |          1 |
      Leukemia Mononuclear                 | X        X     X  X  X     X                                             |         26 |
                                            __________________________________________________________________________|____________|
   Adrenal Medulla                         | +  +  +  +  +  +  +  +  +  +                                             |  60        |
 __________________________________________________________________________________________________________________________________ 

                         * : 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  22                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 7| 8| 8| 7| 6| 8| 8| 6| 6| 6|                                            |            |
                             DAY ON TEST   | 0| 1| 9| 0| 4| 3| 9| 5| 1| 8|                                            |            |
                                           | 5| 0| 8| 5| 0| 1| 4| 9| 8| 3|                                            |            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 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|                                            |     T      |
                               ANIMAL ID   | 4| 4| 4| 4| 4| 4| 4| 4| 4| 4|                                            |     A      |
    0.125%                                 | 7| 7| 7| 7| 7| 7| 7| 7| 7| 8|                                            |     L      |
                                           | 1| 2| 3| 4| 5| 6| 7| 8| 9| 0|                                            |            |
 __________________________________________________________________________________________________________________________________ 
 ENDOCRINE SYSTEM - cont                   |                                                                          |            |
                                           |                                                                          |            |
      Leukemia Mononuclear                 |          X     X                                                         |         19 |
      Pheochromocytoma Benign              |       X                                                                  |          2 |
                                            __________________________________________________________________________|____________|
   Islets, Pancreatic                      | +  +  +  +  +  +  +  +  +  +                                             |  59        |
      Adenoma                              |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Parathyroid Gland                       | +  +  M  +  +  +  M  +  +  +                                             |  55        |
                                            __________________________________________________________________________|____________|
   Pituitary Gland                         | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 | X                                                                        |         13 |
      Pars Distalis, Adenoma               |    X  X     X  X        X  X                                             |         27 |
      Pars Distalis, Carcinoma             |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Thyroid Gland                           | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 |                                                                          |          1 |
      C-Cell, Adenoma                      |                                                                          |          7 |
 _____________________________________________________________________________________________________________________|            |
 GENERAL BODY SYSTEM                       |                                                                          |            |
                                           |                                                                          |            |
    None                                   |                                                                          |            |
 _____________________________________________________________________________________________________________________|            |
 GENITAL SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Clitoral Gland                          | +  +  +  +  +  +  +  +  +  +                                             |  59        |
      Adenoma                              |                                                                          |          6 |
      Carcinoma                            |       X                                                                  |          4 |
      Leukemia Mononuclear                 |                                                                          |          2 |
                                            __________________________________________________________________________|____________|
   Ovary                                   | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Granulosa Cell Tumor Malignant       |                            X                                             |          1 |
      Granulosa Cell Tumor Benign          |                                                                          |          1 |
      Leukemia Mononuclear                 |                                                                          |          4 |
                                            __________________________________________________________________________|____________|
   Uterus                                  | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leiomyoma                            |    X                                                                     |          1 |
      Leukemia Mononuclear                 |                                                                          |         10 |
      Polyp Stromal                        |    X        X     X        X                                             |         12 |
      Sarcoma Stromal                      |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Vagina                                  |                   +        M                                             |   1        |
 _____________________________________________________________________________________________________________________|            |
 HEMATOPOIETIC SYSTEM                      |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Bone Marrow                             | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 |       X              X     X                                             |         25 |
                                            __________________________________________________________________________|____________|
   Lymph Node                              |          +  +     +  +     +                                             |  24        |
      Leukemia Mononuclear                 |                                                                          |          4 |
      Deep Cervical, Leukemia Mononuclear  |                                                                          |          4 |
      Iliac, Leukemia Mononuclear          |                                                                          |          4 |
 __________________________________________________________________________________________________________________________________ 

                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  

                                                             Page  23                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 7| 8| 8| 7| 6| 8| 8| 6| 6| 6|                                            |            |
                             DAY ON TEST   | 0| 1| 9| 0| 4| 3| 9| 5| 1| 8|                                            |            |
                                           | 5| 0| 8| 5| 0| 1| 4| 9| 8| 3|                                            |            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 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|                                            |     T      |
                               ANIMAL ID   | 4| 4| 4| 4| 4| 4| 4| 4| 4| 4|                                            |     A      |
    0.125%                                 | 7| 7| 7| 7| 7| 7| 7| 7| 7| 8|                                            |     L      |
                                           | 1| 2| 3| 4| 5| 6| 7| 8| 9| 0|                                            |            |
 __________________________________________________________________________________________________________________________________ 
 HEMATOPOIETIC SYSTEM - cont               |                                                                          |            |
                                           |                                                                          |            |
      Inguinal, Leukemia Mononuclear       |                                                                          |          3 |
      Mediastinal, Leukemia Mononuclear    |                   X                                                      |         13 |
      Pancreatic, Leukemia Mononuclear     |          X           X     X                                             |         14 |
      Popliteal, Leukemia Mononuclear      |                                                                          |          2 |
      Renal, Leukemia Mononuclear          |                      X                                                   |          8 |
      Thoracic, Leukemia Mononuclear       |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Lymph Node, Mandibular                  | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 | X              X  X  X     X                                             |         27 |
                                            __________________________________________________________________________|____________|
   Lymph Node, Mesenteric                  | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 | X                    X     X                                             |         21 |
                                            __________________________________________________________________________|____________|
   Spleen                                  | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 | X     X  X     X  X  X     X                                             |         33 |
                                            __________________________________________________________________________|____________|
   Thymus                                  | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 |                                                                          |         10 |
 _____________________________________________________________________________________________________________________|            |
 INTEGUMENTARY SYSTEM                      |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Mammary Gland                           | +  +  +  +  +  +  +  +  +  +                                             |  59        |
      Carcinoma                            |    X        X                                                            |          6 |
      Fibroadenoma                         | X  X                                                                     |         16 |
      Fibroadenoma, Multiple               |       X        X                                                         |         17 |
                                            __________________________________________________________________________|____________|
   Skin                                    | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Basal Cell Carcinoma                 |                                                                          |          1 |
      Subcutaneous Tissue, Fibroma         |                                                                          |          2 |
      Subcutaneous Tissue, Fibroma,        |                                                                          |            |
          Multiple                         |                                                                          |          1 |
 _____________________________________________________________________________________________________________________|            |
 MUSCULOSKELETAL SYSTEM                    |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Bone                                    | +  +  +  +  +  +  +  +  +  +                                             |  59        |
                                            __________________________________________________________________________|____________|
   Skeletal Muscle                         |                                                                          |   1        |
 _____________________________________________________________________________________________________________________|            |
 NERVOUS SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Brain                                   | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 |                                                                          |          4 |
                                            __________________________________________________________________________|____________|
   Peripheral Nerve                        |                                                                          |   1        |
                                            __________________________________________________________________________|____________|
   Spinal Cord                             |                                                                          |   2        |
 _____________________________________________________________________________________________________________________|            |
 RESPIRATORY SYSTEM                        |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Lung                                    | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Alveolar/Bronchiolar Adenoma         |                                                                          |          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  24                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 7| 8| 8| 7| 6| 8| 8| 6| 6| 6|                                            |            |
                             DAY ON TEST   | 0| 1| 9| 0| 4| 3| 9| 5| 1| 8|                                            |            |
                                           | 5| 0| 8| 5| 0| 1| 4| 9| 8| 3|                                            |            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 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|                                            |     T      |
                               ANIMAL ID   | 4| 4| 4| 4| 4| 4| 4| 4| 4| 4|                                            |     A      |
    0.125%                                 | 7| 7| 7| 7| 7| 7| 7| 7| 7| 8|                                            |     L      |
                                           | 1| 2| 3| 4| 5| 6| 7| 8| 9| 0|                                            |            |
 __________________________________________________________________________________________________________________________________ 
 RESPIRATORY SYSTEM - cont                 |                                                                          |            |
                                           |                                                                          |            |
      Alveolar/Bronchiolar Carcinoma       |                                                                          |          1 |
      Leukemia Mononuclear                 | X                 X  X     X                                             |         21 |
                                            __________________________________________________________________________|____________|
   Nose                                    | +  +  +  +  +  +  +  +  +  +                                             |  60        |
                                            __________________________________________________________________________|____________|
   Trachea                                 | +  +  +  +  +  +  +  +  +  +                                             |  60        |
 _____________________________________________________________________________________________________________________|            |
 SPECIAL SENSES SYSTEM                     |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Ear                                     |                +                                                         |   1        |
                                            __________________________________________________________________________|____________|
   Eye                                     |                +                                                         |   1        |
 _____________________________________________________________________________________________________________________|            |
 URINARY SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Kidney                                  | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 | X                    X     X                                             |         19 |
                                            __________________________________________________________________________|____________|
   Urinary Bladder                         | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 | X                                                                        |          6 |
 __________________________________________________________________________________________________________________________________ 
 SYSTEMIC LESIONS                          |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Multiple Organs                         | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 | X     X  X     X  X  X     X                                             |         33 |
 __________________________________________________________________________________________________________________________________ 

                         * : 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: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 7| 6| 6| 8| 6| 8| 8| 8| 8| 7| 7| 8| 6| 4| 7| 8| 8| 8| 7| 8| 8| 8| 8| 8| 7|             
                             DAY ON TEST   | 7| 0| 6| 4| 8| 1| 9| 9| 9| 7| 5| 5| 1| 2| 3| 9| 1| 9| 5| 9| 9| 9| 9| 9| 0|             
                                           | 2| 0| 6| 5| 2| 7| 8| 8| 8| 4| 8| 6| 3| 5| 8| 8| 7| 8| 7| 8| 8| 0| 8| 4| 3|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   FISCHER 344 RATS FEMALE                 | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
                               ANIMAL ID   | 4| 4| 4| 4| 4| 4| 4| 4| 4| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5|             
    0.25%                                  | 9| 9| 9| 9| 9| 9| 9| 9| 9| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 1| 1| 1| 1| 1| 1|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 ALIMENTARY SYSTEM                         |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Esophagus                               | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Large, Colon                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  M|             
                                            __________________________________________________________________________|             
   Intestine Large, Rectum                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Large, Cecum                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Small, Duodenum               | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Carcinoma                            |                                                                          |             
                                            __________________________________________________________________________|             
   Intestine Small, Jejunum                | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Carcinoma                            |                                                                          |             
                                            __________________________________________________________________________|             
   Intestine Small, Ileum                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leiomyosarcoma                       |          X                                                               |             
                                            __________________________________________________________________________|             
   Liver                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Hepatocellular Adenoma               |                                                                          |             
      Leukemia Mononuclear                 | X     X        X     X           X        X           X        X        X|             
      Osteosarcoma, Metastatic, Bone       |                                                                          |             
                                            __________________________________________________________________________|             
   Mesentery                               | +  +                       +                                            +|             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Oral Mucosa                             |                                        +                                 |             
      Squamous Cell Carcinoma              |                                        X                                 |             
                                            __________________________________________________________________________|             
   Pancreas                                | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X                                                     X                  |             
                                            __________________________________________________________________________|             
   Salivary Glands                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Stomach, Forestomach                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |       X                                                                  |             
      Squamous Cell Papilloma              |                                                                          |             
                                            __________________________________________________________________________|             
   Stomach, Glandular                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Tongue                                  |                                     +                             +      |             
      Squamous Cell Carcinoma              |                                     X                                    |             
      Squamous Cell Papilloma              |                                                                   X      |             
 _____________________________________________________________________________________________________________________|             
 CARDIOVASCULAR SYSTEM                     |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Blood Vessel                            | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Heart                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |       X                                               X                 X|             
 _____________________________________________________________________________________________________________________|             
 ENDOCRINE SYSTEM                          |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Adrenal Cortex                          | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X     X                          X        X           X                 X|             
                                            __________________________________________________________________________|             
   Adrenal Medulla                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |       X                          X        X           X                 X|             
      Pheochromocytoma Benign              |                                                                          |             
                                            __________________________________________________________________________|             
   Islets, Pancreatic                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |                                                             X  X         |             
 _____________________________________________________________________________________________________________________|             

                                                             Page  26                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 7| 6| 6| 8| 6| 8| 8| 8| 8| 7| 7| 8| 6| 4| 7| 8| 8| 8| 7| 8| 8| 8| 8| 8| 7|             
                             DAY ON TEST   | 7| 0| 6| 4| 8| 1| 9| 9| 9| 7| 5| 5| 1| 2| 3| 9| 1| 9| 5| 9| 9| 9| 9| 9| 0|             
                                           | 2| 0| 6| 5| 2| 7| 8| 8| 8| 4| 8| 6| 3| 5| 8| 8| 7| 8| 7| 8| 8| 0| 8| 4| 3|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   FISCHER 344 RATS FEMALE                 | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
                               ANIMAL ID   | 4| 4| 4| 4| 4| 4| 4| 4| 4| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5|             
    0.25%                                  | 9| 9| 9| 9| 9| 9| 9| 9| 9| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 1| 1| 1| 1| 1| 1|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 ENDOCRINE SYSTEM - cont                   |                                                                          |             
                                           |                                                                          |             
      Carcinoma                            |                         X                                                |             
                                            __________________________________________________________________________|             
   Parathyroid Gland                       | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   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, Carcinoma             |                                                    X                     |             
                                            __________________________________________________________________________|             
   Thyroid Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                          |             
      C-Cell, Adenoma                      |                                                       X                  |             
      C-Cell, Carcinoma                    |                   X                                                      |             
      Follicular Cell, Adenoma             |                                                                          |             
      Follicular Cell, Carcinoma           |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 GENERAL BODY SYSTEM                       |                                                                          |             
                                           |                                                                          |             
    None                                   |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 GENITAL SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Clitoral Gland                          | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |                                              X              X            |             
      Carcinoma                            |                X                                X                    X   |             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Ovary                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Carcinoma                            |                               X                                          |             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Uterus                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |                                                                          |             
      Leiomyoma                            |                                                                          |             
      Leukemia Mononuclear                 |                                                                          |             
      Polyp Stromal                        |                                  X     X                             X   |             
      Sarcoma Stromal                      |                                                             X            |             
                                            __________________________________________________________________________|             
   Vagina                                  |                M           M     M                                       |             
 _____________________________________________________________________________________________________________________|             
 HEMATOPOIETIC SYSTEM                      |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Bone Marrow                             | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X     X              X                                         X        X|             
                                            __________________________________________________________________________|             
   Lymph Node                              | +  +                    +     +        +        +        +     +         |             
      Leukemia Mononuclear                 |                                                                X         |             
      Iliac, Leukemia Mononuclear          |                                                                          |             
      Mediastinal, Leukemia Mononuclear    | X                                                              X         |             
      Pancreatic, Carcinoma, Metastatic,   |                                                                          |             
           Ovary                           |                               X                                          |             
      Pancreatic, Leukemia Mononuclear     | X                                                              X         |             
      Popliteal, Leukemia Mononuclear      |                                                                          |             
      Renal, Leukemia Mononuclear          |                                                                          |             
 _____________________________________________________________________________________________________________________|             

                                                             Page  27                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 7| 6| 6| 8| 6| 8| 8| 8| 8| 7| 7| 8| 6| 4| 7| 8| 8| 8| 7| 8| 8| 8| 8| 8| 7|             
                             DAY ON TEST   | 7| 0| 6| 4| 8| 1| 9| 9| 9| 7| 5| 5| 1| 2| 3| 9| 1| 9| 5| 9| 9| 9| 9| 9| 0|             
                                           | 2| 0| 6| 5| 2| 7| 8| 8| 8| 4| 8| 6| 3| 5| 8| 8| 7| 8| 7| 8| 8| 0| 8| 4| 3|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   FISCHER 344 RATS FEMALE                 | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
                               ANIMAL ID   | 4| 4| 4| 4| 4| 4| 4| 4| 4| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5|             
    0.25%                                  | 9| 9| 9| 9| 9| 9| 9| 9| 9| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 1| 1| 1| 1| 1| 1|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 HEMATOPOIETIC SYSTEM - cont               |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Lymph Node, Mandibular                  | +  +  +  +  +  +  +  +  +  +  I  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X     X        X                 X        X                    X         |             
                                            __________________________________________________________________________|             
   Lymph Node, Mesenteric                  | +  +  +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +  +  +  +  +  +  +|             
      Carcinoma, Metastatic, Ovary         |                               X                                          |             
      Leukemia Mononuclear                 |       X              X           X        X                              |             
                                            __________________________________________________________________________|             
   Spleen                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X     X        X     X           X        X           X        X        X|             
      Osteosarcoma, Metastatic, Bone       |                                                                          |             
                                            __________________________________________________________________________|             
   Thymus                                  | +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                          |             
      Thymoma Malignant                    |                                                                X         |             
 _____________________________________________________________________________________________________________________|             
 INTEGUMENTARY SYSTEM                      |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Mammary Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |                                                                          |             
      Carcinoma                            |                                                                X     X   |             
      Fibroadenoma                         |    X     X  X     X     X  X  X                          X  X  X         |             
      Fibroadenoma, Multiple               |                X     X                       X  X  X                 X   |             
                                            __________________________________________________________________________|             
   Skin                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Keratoacanthoma                      |                                                                         X|             
      Subcutaneous Tissue, Fibroma         |                                                                          |             
      Subcutaneous Tissue, Fibrosarcoma    |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 MUSCULOSKELETAL SYSTEM                    |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Bone                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Osteosarcoma                         |                                                                          |             
                                            __________________________________________________________________________|             
   Skeletal Muscle                         |                                                                          |             
      Leukemia Mononuclear                 |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 NERVOUS SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Brain                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |       X                                               X                 X|             
                                            __________________________________________________________________________|             
   Peripheral Nerve                        |                                                                +         |             
                                            __________________________________________________________________________|             
   Spinal Cord                             |                                                                +         |             
 _____________________________________________________________________________________________________________________|             
 RESPIRATORY SYSTEM                        |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Lung                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Alveolar/Bronchiolar Adenoma         |                                                                          |             
      Carcinoma, Metastatic, Ovary         |                               X                                          |             
      Leukemia Mononuclear                 | X     X                                               X                 X|             
                                            __________________________________________________________________________|             
   Nose                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Trachea                                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             
 SPECIAL SENSES SYSTEM                     |                                                                          |             
                                           |                                                                          |             
 _____________________________________________________________________________________________________________________|             

                                                             Page  28                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 7| 6| 6| 8| 6| 8| 8| 8| 8| 7| 7| 8| 6| 4| 7| 8| 8| 8| 7| 8| 8| 8| 8| 8| 7|             
                             DAY ON TEST   | 7| 0| 6| 4| 8| 1| 9| 9| 9| 7| 5| 5| 1| 2| 3| 9| 1| 9| 5| 9| 9| 9| 9| 9| 0|             
                                           | 2| 0| 6| 5| 2| 7| 8| 8| 8| 4| 8| 6| 3| 5| 8| 8| 7| 8| 7| 8| 8| 0| 8| 4| 3|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   FISCHER 344 RATS FEMALE                 | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
                               ANIMAL ID   | 4| 4| 4| 4| 4| 4| 4| 4| 4| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5|             
    0.25%                                  | 9| 9| 9| 9| 9| 9| 9| 9| 9| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 1| 1| 1| 1| 1| 1|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 SPECIAL SENSES SYSTEM - cont              |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Ear                                     |                                                                          |             
                                            __________________________________________________________________________|             
   Eye                                     |                                                                +         |             
                                            __________________________________________________________________________|             
   Zymbal's Gland                          |                                                                          |             
      Carcinoma                            |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 URINARY SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Kidney                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X     X                                   X           X        X        X|             
                                            __________________________________________________________________________|             
   Urinary Bladder                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 SYSTEMIC LESIONS                          |                                                                          |             
                                            __________________________________________________________________________|             
   Multiple Organs                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X     X        X     X           X        X           X        X        X|             
 _____________________________________________________________________________________________________________________|             

                                                             Page  29                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 7| 7| 7| 7| 6| 8| 8| 8| 8| 8| 6| 6| 0| 4| 0| 8| 7| 8| 5| 8| 8| 8| 6| 8| 6|             
                             DAY ON TEST   | 6| 6| 8| 8| 6| 9| 9| 9| 9| 9| 4| 6| 2| 9| 2| 6| 9| 8| 7| 1| 9| 9| 3| 0| 5|             
                                           | 7| 7| 9| 9| 1| 8| 8| 8| 8| 8| 9| 7| 2| 8| 2| 0| 9| 3| 8| 6| 8| 8| 2| 1| 7|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   FISCHER 344 RATS 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   | 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5|             
    0.25%                                  | 1| 1| 1| 1| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 4|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 ALIMENTARY SYSTEM                         |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Esophagus                               | +  +  +  +  +  +  +  +  +  +  +  +     +     +  +  +  A  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Large, Colon                  | +  +  +  +  +  +  +  +  +  +  +  +     +     +  +  +  M  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Large, Rectum                 | +  +  +  +  +  +  +  +  +  +  +  +     +     +  +  +  A  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Large, Cecum                  | +  +  +  +  +  +  +  +  +  +  +  +     +     +  +  +  M  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Small, Duodenum               | +  +  +  +  +  +  +  +  +  +  +  +     +     +  +  +  M  +  +  +  +  +  +|             
      Carcinoma                            |                         X                                                |             
                                            __________________________________________________________________________|             
   Intestine Small, Jejunum                | +  +  +  +  +  +  +  +  +  +  +  +     +     +  +  +  M  +  +  +  +  +  +|             
      Carcinoma                            |                                                                          |             
                                            __________________________________________________________________________|             
   Intestine Small, Ileum                  | +  +  +  +  +  +  +  +  +  +  +  +     +     +  +  +  M  +  +  +  +  +  +|             
      Leiomyosarcoma                       |                                                                          |             
                                            __________________________________________________________________________|             
   Liver                                   | +  +  +  +  +  +  +  +  +  +  +  +     +     +  +  +  +  +  +  +  +  +  +|             
      Hepatocellular Adenoma               |                   X                                                      |             
      Leukemia Mononuclear                 | X     X                          X     X                 X        X  X  X|             
      Osteosarcoma, Metastatic, Bone       |                                                                          |             
                                            __________________________________________________________________________|             
   Mesentery                               | +     +  +                                         +                     |             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Oral Mucosa                             |                                                                          |             
      Squamous Cell Carcinoma              |                                                                          |             
                                            __________________________________________________________________________|             
   Pancreas                                | +  +  +  +  +  +  +  +  +  +  +  +     +     +  +  +  M  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X                                X                                       |             
                                            __________________________________________________________________________|             
   Salivary Glands                         | +  +  +  +  +  +  +  +  +  +  +  +     +     +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X                                                                        |             
                                            __________________________________________________________________________|             
   Stomach, Forestomach                    | +  +  +  +  +  +  +  +  +  +  +  +     +     +  +  +  M  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X     X                                                                  |             
      Squamous Cell Papilloma              |                                                          X               |             
                                            __________________________________________________________________________|             
   Stomach, Glandular                      | +  +  +  +  +  +  +  +  +  +  +  +     +     +  +  +  M  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |       X                                                                  |             
                                            __________________________________________________________________________|             
   Tongue                                  |                                                                +         |             
      Squamous Cell Carcinoma              |                                                                          |             
      Squamous Cell Papilloma              |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 CARDIOVASCULAR SYSTEM                     |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Blood Vessel                            | +  +  +  +  +  +  +  +  +  +  +  +     +     +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Heart                                   | +  +  +  +  +  +  +  +  +  +  +  +     +     +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X                                                                        |             
 _____________________________________________________________________________________________________________________|             
 ENDOCRINE SYSTEM                          |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Adrenal Cortex                          | +  +  +  +  +  +  +  +  +  +  +  +     +     +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X     X                          X     X                 X           X  X|             
                                            __________________________________________________________________________|             
   Adrenal Medulla                         | +  +  +  +  +  +  +  +  +  +  +  +     +     +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X     X                          X     X                                X|             
      Pheochromocytoma Benign              |          X                                                               |             
                                            __________________________________________________________________________|             
   Islets, Pancreatic                      | +  +  +  +  +  +  +  +  +  +  +  +     +     +  +  +  M  +  +  +  +  +  +|             
      Adenoma                              |                                                          X               |             
 _____________________________________________________________________________________________________________________|             

                                                             Page  30                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 7| 7| 7| 7| 6| 8| 8| 8| 8| 8| 6| 6| 0| 4| 0| 8| 7| 8| 5| 8| 8| 8| 6| 8| 6|             
                             DAY ON TEST   | 6| 6| 8| 8| 6| 9| 9| 9| 9| 9| 4| 6| 2| 9| 2| 6| 9| 8| 7| 1| 9| 9| 3| 0| 5|             
                                           | 7| 7| 9| 9| 1| 8| 8| 8| 8| 8| 9| 7| 2| 8| 2| 0| 9| 3| 8| 6| 8| 8| 2| 1| 7|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   FISCHER 344 RATS 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   | 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5|             
    0.25%                                  | 1| 1| 1| 1| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 4|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 ENDOCRINE SYSTEM - cont                   |                                                                          |             
                                           |                                                                          |             
      Carcinoma                            |                                                                          |             
                                            __________________________________________________________________________|             
   Parathyroid Gland                       | +  +  +  M  +  +  +  +  +  +  +  +     +     +  M  +  +  +  +  +  +  M  +|             
                                            __________________________________________________________________________|             
   Pituitary Gland                         | +  +  +  +  +  +  +  +  +  +  +  +     +     +  +  +  M  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X                                X                                      X|             
      Pars Distalis, Adenoma               |    X        X     X  X  X  X                 X  X  X        X        X   |             
      Pars Distalis, Carcinoma             |                                                                          |             
                                            __________________________________________________________________________|             
   Thyroid Gland                           | +  +  +  +  +  +  +  +  +  +  +  +     +     +  +  +  A  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                          |             
      C-Cell, Adenoma                      |    X                          X              X     X        X           X|             
      C-Cell, Carcinoma                    |                      X                                                   |             
      Follicular Cell, Adenoma             |                                                                          |             
      Follicular Cell, Carcinoma           |                                                                X         |             
 _____________________________________________________________________________________________________________________|             
 GENERAL BODY SYSTEM                       |                                                                          |             
                                           |                                                                          |             
    None                                   |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 GENITAL SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Clitoral Gland                          | +  +  +  +  +  +  +  +  +  +  +  +     +     +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |             X           X        X                                       |             
      Carcinoma                            |    X                                         X                           |             
      Leukemia Mononuclear                 | X                                                                        |             
                                            __________________________________________________________________________|             
   Ovary                                   | +  +  +  +  +  +  +  +  +  +  +  +     +     +  +  +  M  +  +  +  +  +  +|             
      Carcinoma                            |                                                                          |             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Uterus                                  | +  +  +  +  +  +  +  +  +  +  +  +     +     +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |       X                                                                  |             
      Leiomyoma                            |                                                                          |             
      Leukemia Mononuclear                 |                                                                          |             
      Polyp Stromal                        |                                                                      X   |             
      Sarcoma Stromal                      |                                                                          |             
                                            __________________________________________________________________________|             
   Vagina                                  | M     M  M                       M           +     M     M        M      |             
 _____________________________________________________________________________________________________________________|             
 HEMATOPOIETIC SYSTEM                      |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Bone Marrow                             | +  +  +  +  +  +  +  +  +  +  +  +     +     +  +  +  A  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X     X                          X     X                 X        X  X  X|             
                                            __________________________________________________________________________|             
   Lymph Node                              | +     +                       +  +     +        +              +  +     +|             
      Leukemia Mononuclear                 |                                                                          |             
      Iliac, Leukemia Mononuclear          |                                                                          |             
      Mediastinal, Leukemia Mononuclear    | X     X                                X                                X|             
      Pancreatic, Carcinoma, Metastatic,   |                                                                          |             
           Ovary                           |                                                                          |             
      Pancreatic, Leukemia Mononuclear     | X                                X                                X      |             
      Popliteal, Leukemia Mononuclear      |                                                                          |             
      Renal, Leukemia Mononuclear          | X                                                                        |             
 _____________________________________________________________________________________________________________________|             

                                                             Page  31                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 7| 7| 7| 7| 6| 8| 8| 8| 8| 8| 6| 6| 0| 4| 0| 8| 7| 8| 5| 8| 8| 8| 6| 8| 6|             
                             DAY ON TEST   | 6| 6| 8| 8| 6| 9| 9| 9| 9| 9| 4| 6| 2| 9| 2| 6| 9| 8| 7| 1| 9| 9| 3| 0| 5|             
                                           | 7| 7| 9| 9| 1| 8| 8| 8| 8| 8| 9| 7| 2| 8| 2| 0| 9| 3| 8| 6| 8| 8| 2| 1| 7|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   FISCHER 344 RATS 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   | 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5|             
    0.25%                                  | 1| 1| 1| 1| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 4|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 HEMATOPOIETIC SYSTEM - cont               |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Lymph Node, Mandibular                  | +  +  +  +  +  +  +  +  +  +  +  +     +     +  +  +  A  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X     X                          X     X                          X  X   |             
                                            __________________________________________________________________________|             
   Lymph Node, Mesenteric                  | +  +  +  +  +  +  +  +  +  +  +  +     +     +  +  +  M  +  +  +  +  +  +|             
      Carcinoma, Metastatic, Ovary         |                                                                          |             
      Leukemia Mononuclear                 | X     X                          X                                X  X   |             
                                            __________________________________________________________________________|             
   Spleen                                  | +  +  +  +  +  +  +  +  +  +  +  +     +     +  +  +  M  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X     X                          X     X                 X        X  X  X|             
      Osteosarcoma, Metastatic, Bone       |                                                                          |             
                                            __________________________________________________________________________|             
   Thymus                                  | +  +  +  +  +  +  +  +  +  +  +  +     +     +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X                                                                        |             
      Thymoma Malignant                    |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 INTEGUMENTARY SYSTEM                      |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Mammary Gland                           | +  +  +  +  +  +  +  +  +  +  +  +     +     +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |                                                                          |             
      Carcinoma                            |                                                                          |             
      Fibroadenoma                         | X     X  X        X        X                 X  X  X     X           X  X|             
      Fibroadenoma, Multiple               |    X                 X                                                   |             
                                            __________________________________________________________________________|             
   Skin                                    | +  +  +  +  +  +  +  +  +  +  +  +     +     +  +  +  +  +  +  +  +  +  +|             
      Keratoacanthoma                      |                                                                          |             
      Subcutaneous Tissue, Fibroma         |                                                          X               |             
      Subcutaneous Tissue, Fibrosarcoma    |          X                                                               |             
 _____________________________________________________________________________________________________________________|             
 MUSCULOSKELETAL SYSTEM                    |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Bone                                    | +  +  +  +  +  +  +  +  +  +  +  +     +     +  +  +  +  +  +  +  +  +  +|             
      Osteosarcoma                         |                                                                          |             
                                            __________________________________________________________________________|             
   Skeletal Muscle                         |                                                                          |             
      Leukemia Mononuclear                 |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 NERVOUS SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Brain                                   | +  +  +  +  +  +  +  +  +  +  +  +     +     +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Peripheral Nerve                        |                                                                   +      |             
                                            __________________________________________________________________________|             
   Spinal Cord                             |                                                                   +      |             
 _____________________________________________________________________________________________________________________|             
 RESPIRATORY SYSTEM                        |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Lung                                    | +  +  +  +  +  +  +  +  +  +  +  +     +     +  +  +  +  +  +  +  +  +  +|             
      Alveolar/Bronchiolar Adenoma         |                                                                          |             
      Carcinoma, Metastatic, Ovary         |                                                                          |             
      Leukemia Mononuclear                 | X                                                                       X|             
                                            __________________________________________________________________________|             
   Nose                                    | +  +  +  +  +  +  +  +  +  +  +  +     +     +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Trachea                                 | +  +  +  +  +  +  +  +  +  +  +  +     +     +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             
 SPECIAL SENSES SYSTEM                     |                                                                          |             
                                           |                                                                          |             
 _____________________________________________________________________________________________________________________|             

                                                             Page  32                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 7| 7| 7| 7| 6| 8| 8| 8| 8| 8| 6| 6| 0| 4| 0| 8| 7| 8| 5| 8| 8| 8| 6| 8| 6|             
                             DAY ON TEST   | 6| 6| 8| 8| 6| 9| 9| 9| 9| 9| 4| 6| 2| 9| 2| 6| 9| 8| 7| 1| 9| 9| 3| 0| 5|             
                                           | 7| 7| 9| 9| 1| 8| 8| 8| 8| 8| 9| 7| 2| 8| 2| 0| 9| 3| 8| 6| 8| 8| 2| 1| 7|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   FISCHER 344 RATS 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   | 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5|             
    0.25%                                  | 1| 1| 1| 1| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 4|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 SPECIAL SENSES SYSTEM - cont              |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Ear                                     |                                                                          |             
                                            __________________________________________________________________________|             
   Eye                                     |                   +                                                      |             
                                            __________________________________________________________________________|             
   Zymbal's Gland                          |                                                                +         |             
      Carcinoma                            |                                                                X         |             
 _____________________________________________________________________________________________________________________|             
 URINARY SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Kidney                                  | +  +  +  +  +  +  +  +  +  +  +  +     +     +  +  +  A  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X                                X                                      X|             
                                            __________________________________________________________________________|             
   Urinary Bladder                         | +  +  +  +  +  +  +  +  +  +  +  +     +     +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X                                                                        |             
 _____________________________________________________________________________________________________________________|             
 SYSTEMIC LESIONS                          |                                                                          |             
                                            __________________________________________________________________________|             
   Multiple Organs                         | +  +  +  +  +  +  +  +  +  +  +  +     +     +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X     X                          X     X                 X        X  X  X|             
 _____________________________________________________________________________________________________________________|             

                                                             Page  33                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 1| 6| 7| 7| 8| 8| 8| 7| 7| 8|                                            |            |
                             DAY ON TEST   | 9| 5| 8| 7| 8| 9| 9| 2| 7| 8|                                            |            |
                                           | 7| 8| 8| 4| 3| 8| 1| 1| 2| 8|                                            |            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 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|                                            |     T      |
                               ANIMAL ID   | 5| 5| 5| 5| 5| 5| 5| 5| 5| 5|                                            |     A      |
    0.25%                                  | 4| 4| 4| 4| 4| 4| 4| 4| 4| 5|                                            |     L      |
                                           | 1| 2| 3| 4| 5| 6| 7| 8| 9| 0|                                            |            |
 __________________________________________________________________________________________________________________________________ 
 ALIMENTARY SYSTEM                         |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Esophagus                               | +  +  +  +  +  +  +  +  +  +                                             |  57        |
                                            __________________________________________________________________________|____________|
   Intestine Large, Colon                  | +  +  +  +  +  +  +  +  +  +                                             |  56        |
                                            __________________________________________________________________________|____________|
   Intestine Large, Rectum                 | +  +  +  +  +  +  +  +  +  +                                             |  57        |
                                            __________________________________________________________________________|____________|
   Intestine Large, Cecum                  | +  +  +  +  +  +  +  +  +  +                                             |  57        |
                                            __________________________________________________________________________|____________|
   Intestine Small, Duodenum               | +  +  +  +  +  +  +  +  +  +                                             |  57        |
      Carcinoma                            |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Intestine Small, Jejunum                | M  +  +  +  +  +  +  +  +  +                                             |  56        |
      Carcinoma                            |       X                                                                  |          1 |
                                            __________________________________________________________________________|____________|
   Intestine Small, Ileum                  | +  +  +  +  +  +  +  +  +  +                                             |  57        |
      Leiomyosarcoma                       |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Liver                                   | +  +  +  +  +  +  +  +  +  +                                             |  58        |
      Hepatocellular Adenoma               |             X                                                            |          2 |
      Leukemia Mononuclear                 | X     X        X        X  X                                             |         22 |
      Osteosarcoma, Metastatic, Bone       |       X                                                                  |          1 |
                                            __________________________________________________________________________|____________|
   Mesentery                               |                      +     +                                             |  10        |
      Leukemia Mononuclear                 |                            X                                             |          1 |
                                            __________________________________________________________________________|____________|
   Oral Mucosa                             |                                                                          |   1        |
      Squamous Cell Carcinoma              |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Pancreas                                | +  +  +  +  +  +  +  +  +  +                                             |  57        |
      Leukemia Mononuclear                 |       X                    X                                             |          6 |
                                            __________________________________________________________________________|____________|
   Salivary Glands                         | +  +  +  +  +  +  +  +  +  +                                             |  58        |
      Leukemia Mononuclear                 |                            X                                             |          2 |
                                            __________________________________________________________________________|____________|
   Stomach, Forestomach                    | +  +  +  +  +  +  +  +  +  +                                             |  57        |
      Leukemia Mononuclear                 |       X                    X                                             |          5 |
      Squamous Cell Papilloma              |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Stomach, Glandular                      | +  +  +  +  +  +  +  +  +  +                                             |  57        |
      Leukemia Mononuclear                 |       X                                                                  |          2 |
                                            __________________________________________________________________________|____________|
   Tongue                                  |                   +                                                      |   4        |
      Squamous Cell Carcinoma              |                                                                          |          1 |
      Squamous Cell Papilloma              |                                                                          |          1 |
 _____________________________________________________________________________________________________________________|            |
 CARDIOVASCULAR SYSTEM                     |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Blood Vessel                            | +  +  +  +  +  +  +  +  +  +                                             |  58        |
                                            __________________________________________________________________________|____________|
   Heart                                   | +  +  +  +  +  +  +  +  +  +                                             |  58        |
      Leukemia Mononuclear                 |       X                    X                                             |          6 |
 _____________________________________________________________________________________________________________________|            |
 ENDOCRINE SYSTEM                          |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Adrenal Cortex                          | +  +  +  +  +  +  +  +  +  +                                             |  58        |
      Leukemia Mononuclear                 |       X                 X  X                                             |         16 |
 __________________________________________________________________________________________________________________________________ 

                         * : 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: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 1| 6| 7| 7| 8| 8| 8| 7| 7| 8|                                            |            |
                             DAY ON TEST   | 9| 5| 8| 7| 8| 9| 9| 2| 7| 8|                                            |            |
                                           | 7| 8| 8| 4| 3| 8| 1| 1| 2| 8|                                            |            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 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|                                            |     T      |
                               ANIMAL ID   | 5| 5| 5| 5| 5| 5| 5| 5| 5| 5|                                            |     A      |
    0.25%                                  | 4| 4| 4| 4| 4| 4| 4| 4| 4| 5|                                            |     L      |
                                           | 1| 2| 3| 4| 5| 6| 7| 8| 9| 0|                                            |            |
 __________________________________________________________________________________________________________________________________ 
 ENDOCRINE SYSTEM - cont                   |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Adrenal Medulla                         | +  +  +  +  +  +  +  +  +  +                                             |  58        |
      Leukemia Mononuclear                 |       X                 X  X                                             |         13 |
      Pheochromocytoma Benign              |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Islets, Pancreatic                      | +  +  +  +  +  +  +  +  +  +                                             |  57        |
      Adenoma                              |                                                                          |          3 |
      Carcinoma                            |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Parathyroid Gland                       | +  +  M  +  +  +  +  +  M  +                                             |  53        |
                                            __________________________________________________________________________|____________|
   Pituitary Gland                         | +  +  +  +  +  +  +  +  +  +                                             |  57        |
      Leukemia Mononuclear                 |       X                                                                  |          8 |
      Pars Distalis, Adenoma               |    X  X  X  X  X  X  X  X                                                |         34 |
      Pars Distalis, Carcinoma             |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Thyroid Gland                           | +  +  +  +  +  +  +  +  +  +                                             |  57        |
      Leukemia Mononuclear                 |                            X                                             |          1 |
      C-Cell, Adenoma                      |                                                                          |          7 |
      C-Cell, Carcinoma                    |                                                                          |          2 |
      Follicular Cell, Adenoma             |                            X                                             |          1 |
      Follicular Cell, Carcinoma           |                                                                          |          1 |
 _____________________________________________________________________________________________________________________|            |
 GENERAL BODY SYSTEM                       |                                                                          |            |
                                           |                                                                          |            |
    None                                   |                                                                          |            |
 _____________________________________________________________________________________________________________________|            |
 GENITAL SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Clitoral Gland                          | +  +  +  +  +  +  +  +  +  +                                             |  58        |
      Adenoma                              |                                                                          |          5 |
      Carcinoma                            |                                                                          |          5 |
      Leukemia Mononuclear                 |       X                                                                  |          2 |
                                            __________________________________________________________________________|____________|
   Ovary                                   | +  +  +  +  +  +  +  +  +  +                                             |  57        |
      Carcinoma                            |                                                                          |          1 |
      Leukemia Mononuclear                 |       X                                                                  |          1 |
                                            __________________________________________________________________________|____________|
   Uterus                                  | +  +  +  +  +  +  +  +  +  +                                             |  58        |
      Adenoma                              |                                                                          |          1 |
      Leiomyoma                            |             X                                                            |          1 |
      Leukemia Mononuclear                 |       X                    X                                             |          2 |
      Polyp Stromal                        |                   X                                                      |          5 |
      Sarcoma Stromal                      |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Vagina                                  |       M                                                                  |   1        |
 _____________________________________________________________________________________________________________________|            |
 HEMATOPOIETIC SYSTEM                      |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Bone Marrow                             | +  +  +  +  +  +  +  +  +  +                                             |  57        |
 __________________________________________________________________________________________________________________________________ 

                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  

                                                             Page  35                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 1| 6| 7| 7| 8| 8| 8| 7| 7| 8|                                            |            |
                             DAY ON TEST   | 9| 5| 8| 7| 8| 9| 9| 2| 7| 8|                                            |            |
                                           | 7| 8| 8| 4| 3| 8| 1| 1| 2| 8|                                            |            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 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|                                            |     T      |
                               ANIMAL ID   | 5| 5| 5| 5| 5| 5| 5| 5| 5| 5|                                            |     A      |
    0.25%                                  | 4| 4| 4| 4| 4| 4| 4| 4| 4| 5|                                            |     L      |
                                           | 1| 2| 3| 4| 5| 6| 7| 8| 9| 0|                                            |            |
 __________________________________________________________________________________________________________________________________ 
 HEMATOPOIETIC SYSTEM - cont               |                                                                          |            |
                                           |                                                                          |            |
      Leukemia Mononuclear                 | X     X        X                                                         |         16 |
                                            __________________________________________________________________________|____________|
   Lymph Node                              | +     +                                                                  |  19        |
      Leukemia Mononuclear                 |                                                                          |          1 |
      Iliac, Leukemia Mononuclear          | X     X                                                                  |          2 |
      Mediastinal, Leukemia Mononuclear    | X     X                                                                  |          8 |
      Pancreatic, Carcinoma, Metastatic,   |                                                                          |            |
           Ovary                           |                                                                          |          1 |
      Pancreatic, Leukemia Mononuclear     | X     X                                                                  |          7 |
      Popliteal, Leukemia Mononuclear      |       X                                                                  |          1 |
      Renal, Leukemia Mononuclear          | X     X                                                                  |          3 |
                                            __________________________________________________________________________|____________|
   Lymph Node, Mandibular                  | +  +  +  +  +  +  +  M  +  +                                             |  55        |
      Leukemia Mononuclear                 | X     X        X        X  X                                             |         17 |
                                            __________________________________________________________________________|____________|
   Lymph Node, Mesenteric                  | M  +  +  +  +  +  +  +  +  +                                             |  55        |
      Carcinoma, Metastatic, Ovary         |                                                                          |          1 |
      Leukemia Mononuclear                 |       X                 X  X                                             |         12 |
                                            __________________________________________________________________________|____________|
   Spleen                                  | +  +  +  +  +  +  +  +  +  +                                             |  57        |
      Leukemia Mononuclear                 | X     X        X        X  X                                             |         22 |
      Osteosarcoma, Metastatic, Bone       |       X                                                                  |          1 |
                                            __________________________________________________________________________|____________|
   Thymus                                  | +  +  +  +  +  +  +  +  +  +                                             |  57        |
      Leukemia Mononuclear                 |       X                    X                                             |          3 |
      Thymoma Malignant                    |                                                                          |          1 |
 _____________________________________________________________________________________________________________________|            |
 INTEGUMENTARY SYSTEM                      |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Mammary Gland                           | +  +  +  +  +  +  +  +  +  +                                             |  58        |
      Adenoma                              |          X                                                               |          1 |
      Carcinoma                            |                                                                          |          2 |
      Fibroadenoma                         |       X  X     X     X                                                   |         25 |
      Fibroadenoma, Multiple               |                   X                                                      |          9 |
                                            __________________________________________________________________________|____________|
   Skin                                    | +  +  +  +  +  +  +  +  +  +                                             |  58        |
      Keratoacanthoma                      |                                                                          |          1 |
      Subcutaneous Tissue, Fibroma         |                                                                          |          1 |
      Subcutaneous Tissue, Fibrosarcoma    |                                                                          |          1 |
 _____________________________________________________________________________________________________________________|            |
 MUSCULOSKELETAL SYSTEM                    |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Bone                                    | +  +  +  +  +  +  +  +  +  +                                             |  58        |
      Osteosarcoma                         |       X                                                                  |          1 |
                                            __________________________________________________________________________|____________|
   Skeletal Muscle                         |                            +                                             |   1        |
      Leukemia Mononuclear                 |                            X                                             |          1 |
 _____________________________________________________________________________________________________________________|            |
 NERVOUS 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  36                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 1| 6| 7| 7| 8| 8| 8| 7| 7| 8|                                            |            |
                             DAY ON TEST   | 9| 5| 8| 7| 8| 9| 9| 2| 7| 8|                                            |            |
                                           | 7| 8| 8| 4| 3| 8| 1| 1| 2| 8|                                            |            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 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|                                            |     T      |
                               ANIMAL ID   | 5| 5| 5| 5| 5| 5| 5| 5| 5| 5|                                            |     A      |
    0.25%                                  | 4| 4| 4| 4| 4| 4| 4| 4| 4| 5|                                            |     L      |
                                           | 1| 2| 3| 4| 5| 6| 7| 8| 9| 0|                                            |            |
 __________________________________________________________________________________________________________________________________ 
 NERVOUS SYSTEM - cont                     |                                                                          |            |
                                           |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Brain                                   | +  +  +  +  +  +  +  +  +  +                                             |  58        |
      Leukemia Mononuclear                 |                                                                          |          3 |
                                            __________________________________________________________________________|____________|
   Peripheral Nerve                        |                            +                                             |   3        |
                                            __________________________________________________________________________|____________|
   Spinal Cord                             |                            +                                             |   3        |
 _____________________________________________________________________________________________________________________|            |
 RESPIRATORY SYSTEM                        |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Lung                                    | +  +  +  +  +  +  +  +  +  +                                             |  58        |
      Alveolar/Bronchiolar Adenoma         |             X                                                            |          1 |
      Carcinoma, Metastatic, Ovary         |                                                                          |          1 |
      Leukemia Mononuclear                 |       X                 X  X                                             |          9 |
                                            __________________________________________________________________________|____________|
   Nose                                    | +  +  +  +  +  +  +  +  +  +                                             |  58        |
                                            __________________________________________________________________________|____________|
   Trachea                                 | +  +  +  +  +  +  +  +  +  +                                             |  58        |
 _____________________________________________________________________________________________________________________|            |
 SPECIAL SENSES SYSTEM                     |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Ear                                     |                            +                                             |   1        |
                                            __________________________________________________________________________|____________|
   Eye                                     |                            +                                             |   3        |
                                            __________________________________________________________________________|____________|
   Zymbal's Gland                          |                                                                          |   1        |
      Carcinoma                            |                                                                          |          1 |
 _____________________________________________________________________________________________________________________|            |
 URINARY SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Kidney                                  | +  +  +  +  +  +  +  +  +  +                                             |  57        |
      Leukemia Mononuclear                 |       X        X           X                                             |         12 |
                                            __________________________________________________________________________|____________|
   Urinary Bladder                         | +  +  +  +  +  +  +  +  +  +                                             |  58        |
      Leukemia Mononuclear                 |                            X                                             |          2 |
 __________________________________________________________________________________________________________________________________ 
 SYSTEMIC LESIONS                          |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Multiple Organs                         | +  +  +  +  +  +  +  +  +  +                                             |  58        |
      Leukemia Mononuclear                 | X     X        X        X  X                                             |         22 |
 __________________________________________________________________________________________________________________________________ 

                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  

                                                             Page  37                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 6| 7| 7| 8| 8| 6| 8| 6| 7| 6| 8| 8| 8| 8| 8| 8| 8| 8| 6| 8| 6| 7| 8| 8| 6|             
                             DAY ON TEST   | 7| 8| 1| 1| 5| 3| 8| 1| 5| 4| 6| 9| 9| 9| 7| 0| 9| 9| 7| 9| 2| 5| 9| 4| 6|             
                                           | 3| 9| 2| 0| 6| 3| 8| 3| 0| 0| 9| 8| 8| 8| 9| 7| 4| 8| 3| 8| 8| 2| 8| 5| 6|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   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   | 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5|             
    0.5%                                   | 6| 6| 6| 6| 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 8| 8| 8| 8| 8| 8|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 ALIMENTARY SYSTEM                         |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Esophagus                               | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Large, Colon                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X                                                                        |             
                                            __________________________________________________________________________|             
   Intestine Large, Rectum                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Large, Cecum                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X                                                                        |             
                                            __________________________________________________________________________|             
   Intestine Small, Duodenum               | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Small, Jejunum                | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Small, Ileum                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X                                                                        |             
                                            __________________________________________________________________________|             
   Liver                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Hepatocellular Adenoma               |                                                                          |             
      Hepatocellular Adenoma, Multiple     |                   X                                                      |             
      Leukemia Mononuclear                 | X  X  X  X        X  X  X                             X           X  X   |             
                                            __________________________________________________________________________|             
   Mesentery                               |       +     +                                                     +  +   |             
                                            __________________________________________________________________________|             
   Pancreas                                | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  M  +  +  +  +|             
      Leukemia Mononuclear                 | X     X                 X                                                |             
                                            __________________________________________________________________________|             
   Salivary Glands                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Stomach, Forestomach                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X     X                 X                                                |             
                                            __________________________________________________________________________|             
   Stomach, Glandular                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X     X                 X                                                |             
                                            __________________________________________________________________________|             
   Tongue                                  |                                                 +                        |             
 _____________________________________________________________________________________________________________________|             
 CARDIOVASCULAR SYSTEM                     |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Blood Vessel                            | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Heart                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X     X                                                                  |             
      Schwannoma Benign                    |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 ENDOCRINE SYSTEM                          |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Adrenal Cortex                          | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X     X  X        X                                   X           X      |             
                                            __________________________________________________________________________|             
   Adrenal Medulla                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X     X  X        X                                   X           X      |             
      Pheochromocytoma Malignant           |                                                 X                        |             
      Pheochromocytoma Benign              |                   X     X                                                |             
                                            __________________________________________________________________________|             
   Islets, Pancreatic                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  M  +  +  +  +|             
      Adenoma                              |                               X        X                                 |             
                                            __________________________________________________________________________|             
   Parathyroid Gland                       | +  +  +  +  +  +  M  +  +  M  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |                                                                   X      |             
      Carcinoma, Metastatic, Thyroid Gland |                                  X                                       |             
                                            __________________________________________________________________________|             
   Pituitary Gland                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X     X  X                                            X                  |             
 _____________________________________________________________________________________________________________________|             

                                                             Page  38                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 6| 7| 7| 8| 8| 6| 8| 6| 7| 6| 8| 8| 8| 8| 8| 8| 8| 8| 6| 8| 6| 7| 8| 8| 6|             
                             DAY ON TEST   | 7| 8| 1| 1| 5| 3| 8| 1| 5| 4| 6| 9| 9| 9| 7| 0| 9| 9| 7| 9| 2| 5| 9| 4| 6|             
                                           | 3| 9| 2| 0| 6| 3| 8| 3| 0| 0| 9| 8| 8| 8| 9| 7| 4| 8| 3| 8| 8| 2| 8| 5| 6|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   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   | 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5|             
    0.5%                                   | 6| 6| 6| 6| 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 8| 8| 8| 8| 8| 8|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 ENDOCRINE SYSTEM - cont                   |                                                                          |             
                                           |                                                                          |             
      Pars Distalis, Adenoma               |             X  X           X  X        X  X              X        X  X   |             
      Pars Distalis, Carcinoma             |                                                    X           X        X|             
                                            __________________________________________________________________________|             
   Thyroid Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      C-Cell, Adenoma                      |             X  X                 X                       X               |             
      C-Cell, Carcinoma                    |                   X                                                      |             
      Follicular Cell, Carcinoma           |                                                       X                  |             
 _____________________________________________________________________________________________________________________|             
 GENERAL BODY SYSTEM                       |                                                                          |             
                                           |                                                                          |             
    None                                   |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 GENITAL SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Clitoral Gland                          | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |                                           X                 X     X      |             
      Adenoma, Multiple                    |             X                                                            |             
      Carcinoma                            |                         X              X        X        X               |             
      Leukemia Mononuclear                 | X                                                                        |             
                                            __________________________________________________________________________|             
   Ovary                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Granulosa Cell Tumor Benign          |                                     X                                    |             
      Leukemia Mononuclear                 | X                                                                        |             
                                            __________________________________________________________________________|             
   Uterus                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |                                                                          |             
      Carcinoma                            |                                                                          |             
      Leukemia Mononuclear                 | X                       X                                                |             
      Polyp Stromal                        |          X           X     X                       X                     |             
                                            __________________________________________________________________________|             
   Vagina                                  |    M  M                                                           M  +   |             
 _____________________________________________________________________________________________________________________|             
 HEMATOPOIETIC SYSTEM                      |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Bone Marrow                             | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X  X  X  X        X  X                                X           X      |             
                                            __________________________________________________________________________|             
   Lymph Node                              | +  +  +  +           +  +                          +        +     +      |             
      Leukemia Mononuclear                 |                         X                                                |             
      Deep Cervical, Leukemia Mononuclear  |       X                                                                  |             
      Iliac, Leukemia Mononuclear          | X                                                                        |             
      Mediastinal, Leukemia Mononuclear    | X  X  X              X  X                                                |             
      Pancreatic, Leukemia Mononuclear     | X        X              X                                         X      |             
      Renal, Leukemia Mononuclear          | X  X  X                                                                  |             
                                            __________________________________________________________________________|             
   Lymph Node, Mandibular                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X     X  X        X  X                                            X      |             
                                            __________________________________________________________________________|             
   Lymph Node, Mesenteric                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X  X  X  X        X  X  X                             X           X      |             
                                            __________________________________________________________________________|             
   Spleen                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X  X  X  X        X  X  X                             X           X  X   |             
                                            __________________________________________________________________________|             
   Thymus                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X     X                                                                  |             
 _____________________________________________________________________________________________________________________|             

                                                             Page  39                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 6| 7| 7| 8| 8| 6| 8| 6| 7| 6| 8| 8| 8| 8| 8| 8| 8| 8| 6| 8| 6| 7| 8| 8| 6|             
                             DAY ON TEST   | 7| 8| 1| 1| 5| 3| 8| 1| 5| 4| 6| 9| 9| 9| 7| 0| 9| 9| 7| 9| 2| 5| 9| 4| 6|             
                                           | 3| 9| 2| 0| 6| 3| 8| 3| 0| 0| 9| 8| 8| 8| 9| 7| 4| 8| 3| 8| 8| 2| 8| 5| 6|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   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   | 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5|             
    0.5%                                   | 6| 6| 6| 6| 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 8| 8| 8| 8| 8| 8|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 HEMATOPOIETIC SYSTEM - cont               |                                                                          |             
                                           |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 INTEGUMENTARY SYSTEM                      |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Mammary Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |                                              X                           |             
      Carcinoma                            |                                                                X         |             
      Carcinoma, Multiple                  |                                                                          |             
      Fibroadenoma                         |             X                       X  X     X           X  X     X  X   |             
      Fibroadenoma, Multiple               |                   X           X  X        X        X                     |             
                                            __________________________________________________________________________|             
   Skin                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Squamous Cell Papilloma              |             X                                                            |             
      Subcutaneous Tissue, Fibroma         |                               X                                          |             
      Subcutaneous Tissue, Fibrosarcoma    |                                                                          |             
      Subcutaneous Tissue, Hemangiosarcoma |                                                                          |             
      Subcutaneous Tissue, Sarcoma         |                                                                          |             
      Subcutaneous Tissue, Schwannoma      |                                                                          |             
          Malignant                        |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 MUSCULOSKELETAL SYSTEM                    |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Bone                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Skeletal Muscle                         |                                                                   +      |             
      Sarcoma                              |                                                                   X      |             
 _____________________________________________________________________________________________________________________|             
 NERVOUS SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Brain                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Carcinoma, Metastatic, Mammary Gland |                                                                X         |             
      Carcinoma, Metastatic, Pituitary     |                                                                          |             
          Gland                            |                                                    X                     |             
                                            __________________________________________________________________________|             
   Peripheral Nerve                        |                                           +                              |             
                                            __________________________________________________________________________|             
   Spinal Cord                             |                                           +                              |             
      Astrocytoma Malignant                |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 RESPIRATORY SYSTEM                        |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Lung                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Alveolar/Bronchiolar Adenoma         |                                                                          |             
      Carcinoma, Metastatic, Thyroid Gland |                   X                                                      |             
      Leukemia Mononuclear                 | X  X  X              X  X                             X           X      |             
                                            __________________________________________________________________________|             
   Nose                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X                                                                        |             
                                            __________________________________________________________________________|             
   Trachea                                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             
 SPECIAL SENSES SYSTEM                     |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Ear                                     |                                                                          |             
                                            __________________________________________________________________________|             
   Eye                                     |                   +                                                      |             
 _____________________________________________________________________________________________________________________|             
 URINARY SYSTEM                            |                                                                          |             
 _____________________________________________________________________________________________________________________|             

                                                             Page  40                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 6| 7| 7| 8| 8| 6| 8| 6| 7| 6| 8| 8| 8| 8| 8| 8| 8| 8| 6| 8| 6| 7| 8| 8| 6|             
                             DAY ON TEST   | 7| 8| 1| 1| 5| 3| 8| 1| 5| 4| 6| 9| 9| 9| 7| 0| 9| 9| 7| 9| 2| 5| 9| 4| 6|             
                                           | 3| 9| 2| 0| 6| 3| 8| 3| 0| 0| 9| 8| 8| 8| 9| 7| 4| 8| 3| 8| 8| 2| 8| 5| 6|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   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   | 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5|             
    0.5%                                   | 6| 6| 6| 6| 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 8| 8| 8| 8| 8| 8|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 URINARY SYSTEM - cont                     |                                                                          |             
                                           |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Kidney                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X     X              X  X                                         X      |             
                                            __________________________________________________________________________|             
   Urinary Bladder                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |       X                                                                  |             
      Papilloma                            |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 SYSTEMIC LESIONS                          |                                                                          |             
                                            __________________________________________________________________________|             
   Multiple Organs                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X  X  X  X        X  X  X                             X           X  X   |             
 _____________________________________________________________________________________________________________________|             

                                                             Page  41                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 5| 8| 5| 8| 7| 6| 8| 8| 8| 8| 6| 5| 8| 8| 7| 8| 7| 8| 8| 7| 8| 6| 5| 8| 8|             
                             DAY ON TEST   | 9| 9| 7| 5| 8| 2| 6| 9| 9| 9| 9| 9| 4| 9| 0| 3| 7| 3| 9| 8| 9| 5| 0| 9| 9|             
                                           | 6| 8| 2| 8| 9| 8| 2| 8| 8| 8| 0| 1| 1| 7| 5| 1| 7| 0| 8| 9| 1| 9| 1| 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 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   | 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6|             
    0.5%                                   | 8| 8| 8| 8| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 1|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 ALIMENTARY SYSTEM                         |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Esophagus                               | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Large, Colon                  | +  +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Intestine Large, Rectum                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Large, Cecum                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Intestine Small, Duodenum               | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Small, Jejunum                | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Small, Ileum                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  M  M  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Liver                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Hepatocellular Adenoma               |                                                                          |             
      Hepatocellular Adenoma, Multiple     |                                                                          |             
      Leukemia Mononuclear                 | X           X              X        X  X  X  X  X           X     X  X   |             
                                            __________________________________________________________________________|             
   Mesentery                               | +                 +                                            +         |             
                                            __________________________________________________________________________|             
   Pancreas                                | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Salivary Glands                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Stomach, Forestomach                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Stomach, Glandular                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Tongue                                  |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 CARDIOVASCULAR SYSTEM                     |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Blood Vessel                            | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Heart                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                          |             
      Schwannoma Benign                    |    X                                                                     |             
 _____________________________________________________________________________________________________________________|             
 ENDOCRINE SYSTEM                          |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Adrenal Cortex                          | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |             X              X        X  X  X     X           X     X      |             
                                            __________________________________________________________________________|             
   Adrenal Medulla                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |             X              X                    X           X            |             
      Pheochromocytoma Malignant           |                                                                          |             
      Pheochromocytoma Benign              |                            X                                             |             
                                            __________________________________________________________________________|             
   Islets, Pancreatic                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |                                                                          |             
                                            __________________________________________________________________________|             
   Parathyroid Gland                       | +  +  +  +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  M  M  +  M  +  +  +|             
      Adenoma                              |                                                                          |             
      Carcinoma, Metastatic, Thyroid Gland |                                                                          |             
                                            __________________________________________________________________________|             
   Pituitary Gland                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |             X                          X                    X            |             
 _____________________________________________________________________________________________________________________|             

                                                             Page  42                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 5| 8| 5| 8| 7| 6| 8| 8| 8| 8| 6| 5| 8| 8| 7| 8| 7| 8| 8| 7| 8| 6| 5| 8| 8|             
                             DAY ON TEST   | 9| 9| 7| 5| 8| 2| 6| 9| 9| 9| 9| 9| 4| 9| 0| 3| 7| 3| 9| 8| 9| 5| 0| 9| 9|             
                                           | 6| 8| 2| 8| 9| 8| 2| 8| 8| 8| 0| 1| 1| 7| 5| 1| 7| 0| 8| 9| 1| 9| 1| 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 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   | 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6|             
    0.5%                                   | 8| 8| 8| 8| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 1|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 ENDOCRINE SYSTEM - cont                   |                                                                          |             
                                           |                                                                          |             
      Pars Distalis, Adenoma               |       X  X     X  X  X        X     X  X        X  X  X  X     X  X  X  X|             
      Pars Distalis, Carcinoma             |                                                                          |             
                                            __________________________________________________________________________|             
   Thyroid Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      C-Cell, Adenoma                      |                                                                          |             
      C-Cell, Carcinoma                    |                                                                          |             
      Follicular Cell, Carcinoma           |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 GENERAL BODY SYSTEM                       |                                                                          |             
                                           |                                                                          |             
    None                                   |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 GENITAL SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Clitoral Gland                          | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |                      X                 X     X                           |             
      Adenoma, Multiple                    |                                                                          |             
      Carcinoma                            |                                              X                          X|             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Ovary                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Granulosa Cell Tumor Benign          |                                                                          |             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Uterus                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |                X                                                         |             
      Carcinoma                            |                                                                          |             
      Leukemia Mononuclear                 |                                                                          |             
      Polyp Stromal                        |                                  X        X     X                        |             
                                            __________________________________________________________________________|             
   Vagina                                  |                            M                       M        M            |             
 _____________________________________________________________________________________________________________________|             
 HEMATOPOIETIC SYSTEM                      |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Bone Marrow                             | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |             X                          X     X              X     X      |             
                                            __________________________________________________________________________|             
   Lymph Node                              |          +  +  +                       +  +  +              +            |             
      Leukemia Mononuclear                 |                                                                          |             
      Deep Cervical, Leukemia Mononuclear  |                                                                          |             
      Iliac, Leukemia Mononuclear          |                                                                          |             
      Mediastinal, Leukemia Mononuclear    |                                        X  X  X                           |             
      Pancreatic, Leukemia Mononuclear     |             X                                               X            |             
      Renal, Leukemia Mononuclear          |                                                             X            |             
                                            __________________________________________________________________________|             
   Lymph Node, Mandibular                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |             X              X              X                 X     X  X   |             
                                            __________________________________________________________________________|             
   Lymph Node, Mesenteric                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |             X              X           X  X  X           X        X      |             
                                            __________________________________________________________________________|             
   Spleen                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |             X              X        X  X  X  X  X           X     X  X   |             
                                            __________________________________________________________________________|             
   Thymus                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +  +  M  +|             
      Leukemia Mononuclear                 |             X                                            X               |             
 _____________________________________________________________________________________________________________________|             

                                                             Page  43                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 5| 8| 5| 8| 7| 6| 8| 8| 8| 8| 6| 5| 8| 8| 7| 8| 7| 8| 8| 7| 8| 6| 5| 8| 8|             
                             DAY ON TEST   | 9| 9| 7| 5| 8| 2| 6| 9| 9| 9| 9| 9| 4| 9| 0| 3| 7| 3| 9| 8| 9| 5| 0| 9| 9|             
                                           | 6| 8| 2| 8| 9| 8| 2| 8| 8| 8| 0| 1| 1| 7| 5| 1| 7| 0| 8| 9| 1| 9| 1| 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 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   | 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6|             
    0.5%                                   | 8| 8| 8| 8| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 1|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 HEMATOPOIETIC SYSTEM - cont               |                                                                          |             
                                           |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 INTEGUMENTARY SYSTEM                      |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Mammary Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |                      X                                                   |             
      Carcinoma                            |                                                    X                     |             
      Carcinoma, Multiple                  |                               X                                          |             
      Fibroadenoma                         | X        X     X     X                          X  X  X     X        X   |             
      Fibroadenoma, Multiple               |                   X                    X                                 |             
                                            __________________________________________________________________________|             
   Skin                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Squamous Cell Papilloma              |                         X                                                |             
      Subcutaneous Tissue, Fibroma         |                                                                          |             
      Subcutaneous Tissue, Fibrosarcoma    |                                                                          |             
      Subcutaneous Tissue, Hemangiosarcoma |                                     X                                    |             
      Subcutaneous Tissue, Sarcoma         |                                                                      X   |             
      Subcutaneous Tissue, Schwannoma      |                                                                          |             
          Malignant                        |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 MUSCULOSKELETAL SYSTEM                    |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Bone                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Skeletal Muscle                         |                                                                          |             
      Sarcoma                              |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 NERVOUS SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Brain                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Carcinoma, Metastatic, Mammary Gland |                                                                          |             
      Carcinoma, Metastatic, Pituitary     |                                                                          |             
          Gland                            |                                                                          |             
                                            __________________________________________________________________________|             
   Peripheral Nerve                        |                                                                +        +|             
                                            __________________________________________________________________________|             
   Spinal Cord                             |                                                                +        +|             
      Astrocytoma Malignant                |                                                                X         |             
 _____________________________________________________________________________________________________________________|             
 RESPIRATORY SYSTEM                        |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Lung                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Alveolar/Bronchiolar Adenoma         |                            X                                             |             
      Carcinoma, Metastatic, Thyroid Gland |                                                                          |             
      Leukemia Mononuclear                 |             X                          X  X                              |             
                                            __________________________________________________________________________|             
   Nose                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Trachea                                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             
 SPECIAL SENSES SYSTEM                     |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Ear                                     |                                                                         +|             
                                            __________________________________________________________________________|             
   Eye                                     |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 URINARY SYSTEM                            |                                                                          |             
 _____________________________________________________________________________________________________________________|             

                                                             Page  44                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 5| 8| 5| 8| 7| 6| 8| 8| 8| 8| 6| 5| 8| 8| 7| 8| 7| 8| 8| 7| 8| 6| 5| 8| 8|             
                             DAY ON TEST   | 9| 9| 7| 5| 8| 2| 6| 9| 9| 9| 9| 9| 4| 9| 0| 3| 7| 3| 9| 8| 9| 5| 0| 9| 9|             
                                           | 6| 8| 2| 8| 9| 8| 2| 8| 8| 8| 0| 1| 1| 7| 5| 1| 7| 0| 8| 9| 1| 9| 1| 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 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   | 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6|             
    0.5%                                   | 8| 8| 8| 8| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 1|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 URINARY SYSTEM - cont                     |                                                                          |             
                                           |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Kidney                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |             X                             X                              |             
                                            __________________________________________________________________________|             
   Urinary Bladder                         | +  +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                          |             
      Papilloma                            |                                                                      X   |             
 _____________________________________________________________________________________________________________________|             
 SYSTEMIC LESIONS                          |                                                                          |             
                                            __________________________________________________________________________|             
   Multiple Organs                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X           X              X        X  X  X  X  X        X  X     X  X   |             
 _____________________________________________________________________________________________________________________|             

                                                             Page  45                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 8| 8| 8| 8| 7| 8| 6| 6| 8| 8|                                            |            |
                             DAY ON TEST   | 9| 9| 9| 9| 7| 3| 0| 9| 3| 9|                                            |            |
                                           | 8| 8| 8| 8| 4| 1| 0| 1| 9| 8|                                            |            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 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|                                            |     T      |
                               ANIMAL ID   | 6| 6| 6| 6| 6| 6| 6| 6| 6| 6|                                            |     A      |
    0.5%                                   | 1| 1| 1| 1| 1| 1| 1| 1| 1| 2|                                            |     L      |
                                           | 1| 2| 3| 4| 5| 6| 7| 8| 9| 0|                                            |            |
 __________________________________________________________________________________________________________________________________ 
 ALIMENTARY SYSTEM                         |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Esophagus                               | +  +  +  +  +  +  +  +  +  +                                             |  60        |
                                            __________________________________________________________________________|____________|
   Intestine Large, Colon                  | +  +  +  +  +  +  +  +  +  +                                             |  59        |
      Leukemia Mononuclear                 |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Intestine Large, Rectum                 | +  +  +  +  +  +  +  +  I  +                                             |  59        |
                                            __________________________________________________________________________|____________|
   Intestine Large, Cecum                  | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Intestine Small, Duodenum               | +  +  +  +  +  +  +  +  +  +                                             |  60        |
                                            __________________________________________________________________________|____________|
   Intestine Small, Jejunum                | +  +  +  +  +  +  +  +  +  +                                             |  60        |
                                            __________________________________________________________________________|____________|
   Intestine Small, Ileum                  | +  +  +  +  +  +  +  +  +  +                                             |  58        |
      Leukemia Mononuclear                 |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Liver                                   | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Hepatocellular Adenoma               |                X                                                         |          1 |
      Hepatocellular Adenoma, Multiple     |                                                                          |          1 |
      Leukemia Mononuclear                 |       X     X  X        X  X                                             |         26 |
                                            __________________________________________________________________________|____________|
   Mesentery                               |                                                                          |   7        |
                                            __________________________________________________________________________|____________|
   Pancreas                                | +  +  +  +  +  +  +  +  +  +                                             |  59        |
      Leukemia Mononuclear                 |                X        X                                                |          5 |
                                            __________________________________________________________________________|____________|
   Salivary Glands                         | +  +  +  +  +  +  +  +  +  +                                             |  60        |
                                            __________________________________________________________________________|____________|
   Stomach, Forestomach                    | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 |                         X                                                |          4 |
                                            __________________________________________________________________________|____________|
   Stomach, Glandular                      | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 |                                                                          |          3 |
                                            __________________________________________________________________________|____________|
   Tongue                                  |                                                                          |   1        |
 _____________________________________________________________________________________________________________________|            |
 CARDIOVASCULAR SYSTEM                     |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Blood Vessel                            | +  +  +  +  +  +  +  +  +  +                                             |  60        |
                                            __________________________________________________________________________|____________|
   Heart                                   | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 |                X                                                         |          3 |
      Schwannoma Benign                    |                                                                          |          1 |
 _____________________________________________________________________________________________________________________|            |
 ENDOCRINE SYSTEM                          |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Adrenal Cortex                          | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 |             X  X        X                                                |         17 |
                                            __________________________________________________________________________|____________|
   Adrenal Medulla                         | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 |                X        X                                                |         12 |
      Pheochromocytoma Malignant           |                                                                          |          1 |
      Pheochromocytoma Benign              |                                                                          |          3 |
                                            __________________________________________________________________________|____________|
   Islets, Pancreatic                      | +  +  +  +  +  +  +  +  +  +                                             |  59        |
      Adenoma                              |                                                                          |          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  46                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 8| 8| 8| 8| 7| 8| 6| 6| 8| 8|                                            |            |
                             DAY ON TEST   | 9| 9| 9| 9| 7| 3| 0| 9| 3| 9|                                            |            |
                                           | 8| 8| 8| 8| 4| 1| 0| 1| 9| 8|                                            |            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 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|                                            |     T      |
                               ANIMAL ID   | 6| 6| 6| 6| 6| 6| 6| 6| 6| 6|                                            |     A      |
    0.5%                                   | 1| 1| 1| 1| 1| 1| 1| 1| 1| 2|                                            |     L      |
                                           | 1| 2| 3| 4| 5| 6| 7| 8| 9| 0|                                            |            |
 __________________________________________________________________________________________________________________________________ 
 ENDOCRINE SYSTEM - cont                   |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Parathyroid Gland                       | +  +  +  +  +  +  +  +  +  +                                             |  54        |
      Adenoma                              |                                                                          |          1 |
      Carcinoma, Metastatic, Thyroid Gland |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Pituitary Gland                         | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 |                X        X                                                |          9 |
      Pars Distalis, Adenoma               |       X        X        X                                                |         28 |
      Pars Distalis, Carcinoma             |                                                                          |          3 |
                                            __________________________________________________________________________|____________|
   Thyroid Gland                           | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      C-Cell, Adenoma                      |             X              X                                             |          6 |
      C-Cell, Carcinoma                    |                                                                          |          1 |
      Follicular Cell, Carcinoma           |       X                                                                  |          2 |
 _____________________________________________________________________________________________________________________|            |
 GENERAL BODY SYSTEM                       |                                                                          |            |
                                           |                                                                          |            |
    None                                   |                                                                          |            |
 _____________________________________________________________________________________________________________________|            |
 GENITAL SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Clitoral Gland                          | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Adenoma                              |                                                                          |          6 |
      Adenoma, Multiple                    |                                                                          |          1 |
      Carcinoma                            |             X  X                                                         |          8 |
      Leukemia Mononuclear                 |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Ovary                                   | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Granulosa Cell Tumor Benign          |                                                                          |          1 |
      Leukemia Mononuclear                 |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Uterus                                  | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Adenoma                              |                                                                          |          1 |
      Carcinoma                            |          X                                                               |          1 |
      Leukemia Mononuclear                 |                                                                          |          2 |
      Polyp Stromal                        | X           X                                                            |          9 |
                                            __________________________________________________________________________|____________|
   Vagina                                  |                                                                          |   1        |
 _____________________________________________________________________________________________________________________|            |
 HEMATOPOIETIC SYSTEM                      |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Bone Marrow                             | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 |             X  X        X                                                |         16 |
                                            __________________________________________________________________________|____________|
   Lymph Node                              |             +  +                                                         |  18        |
      Leukemia Mononuclear                 |                                                                          |          1 |
      Deep Cervical, Leukemia Mononuclear  |                                                                          |          1 |
      Iliac, Leukemia Mononuclear          |                                                                          |          1 |
      Mediastinal, Leukemia Mononuclear    |             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  47                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 8| 8| 8| 8| 7| 8| 6| 6| 8| 8|                                            |            |
                             DAY ON TEST   | 9| 9| 9| 9| 7| 3| 0| 9| 3| 9|                                            |            |
                                           | 8| 8| 8| 8| 4| 1| 0| 1| 9| 8|                                            |            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 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|                                            |     T      |
                               ANIMAL ID   | 6| 6| 6| 6| 6| 6| 6| 6| 6| 6|                                            |     A      |
    0.5%                                   | 1| 1| 1| 1| 1| 1| 1| 1| 1| 2|                                            |     L      |
                                           | 1| 2| 3| 4| 5| 6| 7| 8| 9| 0|                                            |            |
 __________________________________________________________________________________________________________________________________ 
 HEMATOPOIETIC SYSTEM - cont               |                                                                          |            |
                                           |                                                                          |            |
      Pancreatic, Leukemia Mononuclear     |                                                                          |          6 |
      Renal, Leukemia Mononuclear          |                X                                                         |          5 |
                                            __________________________________________________________________________|____________|
   Lymph Node, Mandibular                  | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 |       X        X        X                                                |         15 |
                                            __________________________________________________________________________|____________|
   Lymph Node, Mesenteric                  | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 |                X                                                         |         17 |
                                            __________________________________________________________________________|____________|
   Spleen                                  | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 |       X     X  X        X  X                                             |         25 |
                                            __________________________________________________________________________|____________|
   Thymus                                  | +  +  +  +  +  +  +  +  +  +                                             |  57        |
      Leukemia Mononuclear                 |                X        X                                                |          6 |
 _____________________________________________________________________________________________________________________|            |
 INTEGUMENTARY SYSTEM                      |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Mammary Gland                           | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Adenoma                              |                                                                          |          2 |
      Carcinoma                            |                         X                                                |          3 |
      Carcinoma, Multiple                  |                                                                          |          1 |
      Fibroadenoma                         |                X  X  X                                                   |         20 |
      Fibroadenoma, Multiple               |                                                                          |          7 |
                                            __________________________________________________________________________|____________|
   Skin                                    | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Squamous Cell Papilloma              |                                                                          |          2 |
      Subcutaneous Tissue, Fibroma         |                                                                          |          1 |
      Subcutaneous Tissue, Fibrosarcoma    |       X                                                                  |          1 |
      Subcutaneous Tissue, Hemangiosarcoma |                                                                          |          1 |
      Subcutaneous Tissue, Sarcoma         |                                                                          |          1 |
      Subcutaneous Tissue, Schwannoma      |                                                                          |            |
          Malignant                        |          X                                                               |          1 |
 _____________________________________________________________________________________________________________________|            |
 MUSCULOSKELETAL SYSTEM                    |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Bone                                    | +  +  +  +  +  +  +  +  +  +                                             |  60        |
                                            __________________________________________________________________________|____________|
   Skeletal Muscle                         |                                                                          |   1        |
      Sarcoma                              |                                                                          |          1 |
 _____________________________________________________________________________________________________________________|            |
 NERVOUS SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Brain                                   | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Carcinoma, Metastatic, Mammary Gland |                                                                          |          1 |
      Carcinoma, Metastatic, Pituitary     |                                                                          |            |
          Gland                            |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Peripheral Nerve                        |                         +                                                |   4        |
                                            __________________________________________________________________________|____________|
   Spinal Cord                             |                         +                                                |   4        |
 __________________________________________________________________________________________________________________________________ 

                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  

                                                             Page  48                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 8| 8| 8| 8| 7| 8| 6| 6| 8| 8|                                            |            |
                             DAY ON TEST   | 9| 9| 9| 9| 7| 3| 0| 9| 3| 9|                                            |            |
                                           | 8| 8| 8| 8| 4| 1| 0| 1| 9| 8|                                            |            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 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|                                            |     T      |
                               ANIMAL ID   | 6| 6| 6| 6| 6| 6| 6| 6| 6| 6|                                            |     A      |
    0.5%                                   | 1| 1| 1| 1| 1| 1| 1| 1| 1| 2|                                            |     L      |
                                           | 1| 2| 3| 4| 5| 6| 7| 8| 9| 0|                                            |            |
 __________________________________________________________________________________________________________________________________ 
 NERVOUS SYSTEM - cont                     |                                                                          |            |
                                           |                                                                          |            |
      Astrocytoma Malignant                |                                                                          |          1 |
 _____________________________________________________________________________________________________________________|            |
 RESPIRATORY SYSTEM                        |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Lung                                    | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Alveolar/Bronchiolar Adenoma         |                                                                          |          1 |
      Carcinoma, Metastatic, Thyroid Gland |                                                                          |          1 |
      Leukemia Mononuclear                 |             X  X        X                                                |         13 |
                                            __________________________________________________________________________|____________|
   Nose                                    | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Trachea                                 | +  +  +  +  +  +  +  +  +  +                                             |  60        |
 _____________________________________________________________________________________________________________________|            |
 SPECIAL SENSES SYSTEM                     |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Ear                                     |                                                                          |   1        |
                                            __________________________________________________________________________|____________|
   Eye                                     |                                                                          |   1        |
 _____________________________________________________________________________________________________________________|            |
 URINARY SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Kidney                                  | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 |                X        X                                                |          9 |
                                            __________________________________________________________________________|____________|
   Urinary Bladder                         | +  +  +  +  +  +  +  +  +  +                                             |  59        |
      Leukemia Mononuclear                 |                                                                          |          1 |
      Papilloma                            |                                                                          |          1 |
 __________________________________________________________________________________________________________________________________ 
 SYSTEMIC LESIONS                          |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Multiple Organs                         | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 |       X     X  X        X  X                                             |         27 |
 __________________________________________________________________________________________________________________________________ 

                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  

                                                             Page  49                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 8| 8| 5| 6| 8| 7| 8| 8| 8| 7| 8| 8| 8| 6| 8| 6| 3| 8| 7| 8| 7| 8| 8| 8| 8|             
                             DAY ON TEST   | 9| 6| 0| 4| 9| 7| 3| 2| 9| 3| 1| 9| 9| 0| 9| 3| 5| 5| 0| 5| 5| 6| 8| 0| 9|             
                                           | 8| 3| 9| 8| 9| 5| 1| 5| 0| 3| 0| 8| 9| 1| 8| 3| 1| 9| 8| 9| 6| 5| 5| 2| 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   | 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6|             
    0.0%                                   | 3| 3| 3| 3| 3| 3| 3| 3| 3| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 5| 5| 5| 5| 5| 5|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 ALIMENTARY SYSTEM                         |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Esophagus                               | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Large, Colon                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                X              X                                          |             
                                            __________________________________________________________________________|             
   Intestine Large, Rectum                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Large, Cecum                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                               X                       X                  |             
                                            __________________________________________________________________________|             
   Intestine Small, Duodenum               | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Small, Jejunum                | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Small, Ileum                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                       X                  |             
                                            __________________________________________________________________________|             
   Liver                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Fibrous Histiocytoma, Metastatic,    |                                                                          |             
           Skin                            |          X                                                               |             
      Leukemia Mononuclear                 | X  X  X        X  X     X     X     X  X              X     X     X      |             
                                            __________________________________________________________________________|             
   Mesentery                               |       +        +  +           +                                          |             
      Leukemia Mononuclear                 |                X              X                                          |             
                                            __________________________________________________________________________|             
   Pancreas                                | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |       X        X              X                       X                  |             
                                            __________________________________________________________________________|             
   Salivary Glands                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Carcinoma                            |                                                                          |             
      Leukemia Mononuclear                 |                               X                                          |             
                                            __________________________________________________________________________|             
   Stomach, Forestomach                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                X              X                       X                  |             
                                            __________________________________________________________________________|             
   Stomach, Glandular                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                X              X                       X                  |             
 _____________________________________________________________________________________________________________________|             
 CARDIOVASCULAR SYSTEM                     |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Blood Vessel                            | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Heart                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |    X  X                       X                       X                  |             
 _____________________________________________________________________________________________________________________|             
 ENDOCRINE SYSTEM                          |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Adrenal Cortex                          | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |    X              X     X     X        X              X     X     X      |             
                                            __________________________________________________________________________|             
   Adrenal Medulla                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |    X  X                                               X     X     X      |             
      Pheochromocytoma Malignant           |                                                                X         |             
      Pheochromocytoma Benign              |                                                                          |             
                                            __________________________________________________________________________|             
   Islets, Pancreatic                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |                                                                          |             
                                            __________________________________________________________________________|             
   Parathyroid Gland                       | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |                                                                          |             
                                            __________________________________________________________________________|             
   Pituitary Gland                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |    X              X           X                       X                  |             
 _____________________________________________________________________________________________________________________|             

                                                             Page  50                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 8| 8| 5| 6| 8| 7| 8| 8| 8| 7| 8| 8| 8| 6| 8| 6| 3| 8| 7| 8| 7| 8| 8| 8| 8|             
                             DAY ON TEST   | 9| 6| 0| 4| 9| 7| 3| 2| 9| 3| 1| 9| 9| 0| 9| 3| 5| 5| 0| 5| 5| 6| 8| 0| 9|             
                                           | 8| 3| 9| 8| 9| 5| 1| 5| 0| 3| 0| 8| 9| 1| 8| 3| 1| 9| 8| 9| 6| 5| 5| 2| 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   | 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6|             
    0.0%                                   | 3| 3| 3| 3| 3| 3| 3| 3| 3| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 5| 5| 5| 5| 5| 5|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 ENDOCRINE SYSTEM - cont                   |                                                                          |             
                                           |                                                                          |             
      Pars Distalis, Adenoma               |    X     X           X  X              X           X     X     X  X  X  X|             
      Pars Distalis, Carcinoma             |                                                                          |             
                                            __________________________________________________________________________|             
   Thyroid Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +  +  +  +|             
      C-Cell, Adenoma                      |                                     X     X        X              X      |             
      C-Cell, Carcinoma                    |                                     X                                    |             
      Follicular Cell, Carcinoma           |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 GENERAL BODY SYSTEM                       |                                                                          |             
                                           |                                                                          |             
    None                                   |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 GENITAL SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Clitoral Gland                          | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +|             
      Adenoma                              |                                           X                              |             
      Adenoma, Multiple                    |             X                                                            |             
      Carcinoma                            |                                                                          |             
      Carcinoma, Multiple                  |                            X                                             |             
                                            __________________________________________________________________________|             
   Ovary                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                   X                                                      |             
                                            __________________________________________________________________________|             
   Uterus                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                X                                                         |             
      Polyp Stromal                        |                   X                       X  X                    X     X|             
      Sarcoma Stromal                      |                                              X                           |             
                                            __________________________________________________________________________|             
   Vagina                                  |    M           M  M  M                                                   |             
 _____________________________________________________________________________________________________________________|             
 HEMATOPOIETIC SYSTEM                      |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Bone Marrow                             | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |    X  X        X  X     X                             X     X     X      |             
                                            __________________________________________________________________________|             
   Lymph Node                              |    +  +           +     +     +              +              +     +      |             
      Mediastinal, Leukemia Mononuclear    |       X           X           X                             X     X      |             
      Pancreatic, Leukemia Mononuclear     |    X                    X                                                |             
      Renal, Leukemia Mononuclear          |       X                                                           X      |             
                                            __________________________________________________________________________|             
   Lymph Node, Mandibular                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |    X  X           X     X     X                       X     X     X      |             
                                            __________________________________________________________________________|             
   Lymph Node, Mesenteric                  | +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |    X  X        X  X     X              X              X     X     X      |             
                                            __________________________________________________________________________|             
   Spleen                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X  X  X        X  X     X     X     X  X              X     X     X      |             
                                            __________________________________________________________________________|             
   Thymus                                  | +  +  +  +  +  I  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  I  +  +|             
      Fibrous Histiocytoma, Metastatic,    |                                                                          |             
           Skin                            |          X                                                               |             
      Leukemia Mononuclear                 |       X           X           X                       X                  |             
 _____________________________________________________________________________________________________________________|             
 INTEGUMENTARY SYSTEM                      |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Mammary Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             

                                                             Page  51                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 8| 8| 5| 6| 8| 7| 8| 8| 8| 7| 8| 8| 8| 6| 8| 6| 3| 8| 7| 8| 7| 8| 8| 8| 8|             
                             DAY ON TEST   | 9| 6| 0| 4| 9| 7| 3| 2| 9| 3| 1| 9| 9| 0| 9| 3| 5| 5| 0| 5| 5| 6| 8| 0| 9|             
                                           | 8| 3| 9| 8| 9| 5| 1| 5| 0| 3| 0| 8| 9| 1| 8| 3| 1| 9| 8| 9| 6| 5| 5| 2| 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   | 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6|             
    0.0%                                   | 3| 3| 3| 3| 3| 3| 3| 3| 3| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 5| 5| 5| 5| 5| 5|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 INTEGUMENTARY SYSTEM - cont               |                                                                          |             
                                           |                                                                          |             
      Adenoma                              |                                                                          |             
      Carcinoma                            |                                                                          |             
      Fibroadenoma                         | X  X                                   X  X        X              X     X|             
      Fibroadenoma, Multiple               |                                                          X               |             
                                            __________________________________________________________________________|             
   Skin                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +|             
      Keratoacanthoma                      | X                                                                        |             
      Subcutaneous Tissue, Fibroma         |                                                                          |             
      Subcutaneous Tissue, Fibrous         |                                                                          |             
          Histiocytoma                     |          X                                                               |             
      Subcutaneous Tissue, Schwannoma      |                                                                          |             
          Benign                           |                      X                                                   |             
 _____________________________________________________________________________________________________________________|             
 MUSCULOSKELETAL SYSTEM                    |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Bone                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Skeletal Muscle                         |          +                                                               |             
      Fibrous Histiocytoma, Metastatic,    |                                                                          |             
           Skin                            |          X                                                               |             
 _____________________________________________________________________________________________________________________|             
 NERVOUS SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Brain                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Carcinoma, Metastatic, Pituitary     |                                                                          |             
          Gland                            |                                                                          |             
      Leukemia Mononuclear                 |    X                                                                     |             
                                            __________________________________________________________________________|             
   Peripheral Nerve                        |    +                                                                     |             
                                            __________________________________________________________________________|             
   Spinal Cord                             |    +                                                                     |             
      Leukemia Mononuclear                 |    X                                                                     |             
 _____________________________________________________________________________________________________________________|             
 RESPIRATORY SYSTEM                        |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Lung                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Fibrous Histiocytoma, Metastatic,    |                                                                          |             
           Skin                            |          X                                                               |             
      Leukemia Mononuclear                 |    X  X           X           X        X              X           X      |             
                                            __________________________________________________________________________|             
   Nose                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Trachea                                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             
 SPECIAL SENSES SYSTEM                     |                                                                          |             
                                           |                                                                          |             
    None                                   |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 URINARY SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Kidney                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Fibrous Histiocytoma, Metastatic,    |                                                                          |             
           Skin                            |          X                                                               |             
      Leukemia Mononuclear                 |    X  X           X     X     X                       X           X      |             
 _____________________________________________________________________________________________________________________|             

                                                             Page  52                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 8| 8| 5| 6| 8| 7| 8| 8| 8| 7| 8| 8| 8| 6| 8| 6| 3| 8| 7| 8| 7| 8| 8| 8| 8|             
                             DAY ON TEST   | 9| 6| 0| 4| 9| 7| 3| 2| 9| 3| 1| 9| 9| 0| 9| 3| 5| 5| 0| 5| 5| 6| 8| 0| 9|             
                                           | 8| 3| 9| 8| 9| 5| 1| 5| 0| 3| 0| 8| 9| 1| 8| 3| 1| 9| 8| 9| 6| 5| 5| 2| 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   | 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6|             
    0.0%                                   | 3| 3| 3| 3| 3| 3| 3| 3| 3| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 5| 5| 5| 5| 5| 5|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 URINARY SYSTEM - cont                     |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Urinary Bladder                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                X                                                         |             
 _____________________________________________________________________________________________________________________|             
 SYSTEMIC LESIONS                          |                                                                          |             
                                            __________________________________________________________________________|             
   Multiple Organs                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X  X  X        X  X     X     X     X  X              X     X     X      |             
 _____________________________________________________________________________________________________________________|             

                                                             Page  53                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 8| 6| 8| 7| 8| 8| 8| 8| 7| 8| 7| 8| 7| 8| 8| 8| 7| 8| 8| 8| 4| 8| 8| 7| 8|             
                             DAY ON TEST   | 5| 4| 9| 4| 9| 9| 9| 9| 8| 1| 7| 1| 1| 9| 9| 9| 3| 4| 9| 6| 0| 9| 9| 2| 3|             
                                           | 8| 8| 8| 4| 9| 8| 9| 8| 8| 7| 7| 7| 7| 9| 8| 9| 8| 9| 8| 1| 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| 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   | 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6|             
    0.0%                                   | 5| 5| 5| 5| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 8|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 ALIMENTARY SYSTEM                         |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Esophagus                               | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Large, Colon                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Intestine Large, Rectum                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Large, Cecum                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Intestine Small, Duodenum               | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Small, Jejunum                | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Small, Ileum                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Liver                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Fibrous Histiocytoma, Metastatic,    |                                                                          |             
           Skin                            |                                                                          |             
      Leukemia Mononuclear                 |          X  X        X     X     X           X  X     X  X              X|             
                                            __________________________________________________________________________|             
   Mesentery                               |                                                                         +|             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Pancreas                                | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                          X               |             
                                            __________________________________________________________________________|             
   Salivary Glands                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Carcinoma                            |                                  X                                       |             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Stomach, Forestomach                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Stomach, Glandular                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                          X               |             
 _____________________________________________________________________________________________________________________|             
 CARDIOVASCULAR SYSTEM                     |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Blood Vessel                            | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Heart                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                         X|             
 _____________________________________________________________________________________________________________________|             
 ENDOCRINE SYSTEM                          |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Adrenal Cortex                          | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |          X  X                    X                    X                 X|             
                                            __________________________________________________________________________|             
   Adrenal Medulla                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |          X                                            X                  |             
      Pheochromocytoma Malignant           |                                                                          |             
      Pheochromocytoma Benign              |                   X        X                                             |             
                                            __________________________________________________________________________|             
   Islets, Pancreatic                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |                                                                          |             
                                            __________________________________________________________________________|             
   Parathyroid Gland                       | +  M  M  +  +  +  +  +  +  +  +  +  +  +  +  I  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |                                        X                                 |             
                                            __________________________________________________________________________|             
   Pituitary Gland                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                       X                  |             
 _____________________________________________________________________________________________________________________|             

                                                             Page  54                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 8| 6| 8| 7| 8| 8| 8| 8| 7| 8| 7| 8| 7| 8| 8| 8| 7| 8| 8| 8| 4| 8| 8| 7| 8|             
                             DAY ON TEST   | 5| 4| 9| 4| 9| 9| 9| 9| 8| 1| 7| 1| 1| 9| 9| 9| 3| 4| 9| 6| 0| 9| 9| 2| 3|             
                                           | 8| 8| 8| 4| 9| 8| 9| 8| 8| 7| 7| 7| 7| 9| 8| 9| 8| 9| 8| 1| 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| 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   | 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6|             
    0.0%                                   | 5| 5| 5| 5| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 8|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 ENDOCRINE SYSTEM - cont                   |                                                                          |             
                                           |                                                                          |             
      Pars Distalis, Adenoma               |       X  X  X     X  X  X     X  X  X                 X  X     X  X     X|             
      Pars Distalis, Carcinoma             |                                           X                          X   |             
                                            __________________________________________________________________________|             
   Thyroid Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      C-Cell, Adenoma                      |       X                                                                 X|             
      C-Cell, Carcinoma                    |          X                                                               |             
      Follicular Cell, Carcinoma           |                                           X                              |             
 _____________________________________________________________________________________________________________________|             
 GENERAL BODY SYSTEM                       |                                                                          |             
                                           |                                                                          |             
    None                                   |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 GENITAL SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Clitoral Gland                          | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |                                  X                 X                     |             
      Adenoma, Multiple                    |                                                                          |             
      Carcinoma                            |    X                                                                     |             
      Carcinoma, Multiple                  |                                                                          |             
                                            __________________________________________________________________________|             
   Ovary                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                          X               |             
                                            __________________________________________________________________________|             
   Uterus                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                          X               |             
      Polyp Stromal                        |    X              X                 X                                    |             
      Sarcoma Stromal                      |                                                                          |             
                                            __________________________________________________________________________|             
   Vagina                                  |                         M     M  M                                       |             
 _____________________________________________________________________________________________________________________|             
 HEMATOPOIETIC SYSTEM                      |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Bone Marrow                             | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |          X                       X                    X  X              X|             
                                            __________________________________________________________________________|             
   Lymph Node                              |    +     +                    +                          +              +|             
      Mediastinal, Leukemia Mononuclear    |                                                          X              X|             
      Pancreatic, Leukemia Mononuclear     |          X                                                              X|             
      Renal, Leukemia Mononuclear          |                                                                         X|             
                                            __________________________________________________________________________|             
   Lymph Node, Mandibular                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |          X           X     X     X                    X  X              X|             
                                            __________________________________________________________________________|             
   Lymph Node, Mesenteric                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |          X  X                                   X     X  X              X|             
                                            __________________________________________________________________________|             
   Spleen                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |          X  X        X     X     X           X  X     X  X              X|             
                                            __________________________________________________________________________|             
   Thymus                                  | +  +  +  +  +  M  +  +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +  +|             
      Fibrous Histiocytoma, Metastatic,    |                                                                          |             
           Skin                            |                                                                          |             
      Leukemia Mononuclear                 |                                                          X              X|             
 _____________________________________________________________________________________________________________________|             
 INTEGUMENTARY SYSTEM                      |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Mammary Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             

                                                             Page  55                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 8| 6| 8| 7| 8| 8| 8| 8| 7| 8| 7| 8| 7| 8| 8| 8| 7| 8| 8| 8| 4| 8| 8| 7| 8|             
                             DAY ON TEST   | 5| 4| 9| 4| 9| 9| 9| 9| 8| 1| 7| 1| 1| 9| 9| 9| 3| 4| 9| 6| 0| 9| 9| 2| 3|             
                                           | 8| 8| 8| 4| 9| 8| 9| 8| 8| 7| 7| 7| 7| 9| 8| 9| 8| 9| 8| 1| 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| 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   | 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6|             
    0.0%                                   | 5| 5| 5| 5| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 8|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 INTEGUMENTARY SYSTEM - cont               |                                                                          |             
                                           |                                                                          |             
      Adenoma                              |          X                                                     X         |             
      Carcinoma                            |                                                                      X   |             
      Fibroadenoma                         | X  X  X  X  X              X        X  X                 X        X     X|             
      Fibroadenoma, Multiple               |                                           X                              |             
                                            __________________________________________________________________________|             
   Skin                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Keratoacanthoma                      |                                                                          |             
      Subcutaneous Tissue, Fibroma         |                   X                                                      |             
      Subcutaneous Tissue, Fibrous         |                                                                          |             
          Histiocytoma                     |                                                                          |             
      Subcutaneous Tissue, Schwannoma      |                                                                          |             
          Benign                           |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 MUSCULOSKELETAL SYSTEM                    |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Bone                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Skeletal Muscle                         |                                                                          |             
      Fibrous Histiocytoma, Metastatic,    |                                                                          |             
           Skin                            |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 NERVOUS SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Brain                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Carcinoma, Metastatic, Pituitary     |                                                                          |             
          Gland                            |                                                                      X   |             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Peripheral Nerve                        |                                                                          |             
                                            __________________________________________________________________________|             
   Spinal Cord                             |                                                                          |             
      Leukemia Mononuclear                 |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 RESPIRATORY SYSTEM                        |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Lung                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Fibrous Histiocytoma, Metastatic,    |                                                                          |             
           Skin                            |                                                                          |             
      Leukemia Mononuclear                 |                                                       X  X               |             
                                            __________________________________________________________________________|             
   Nose                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                         X|             
                                            __________________________________________________________________________|             
   Trachea                                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             
 SPECIAL SENSES SYSTEM                     |                                                                          |             
                                           |                                                                          |             
    None                                   |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 URINARY SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Kidney                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Fibrous Histiocytoma, Metastatic,    |                                                                          |             
           Skin                            |                                                                          |             
      Leukemia Mononuclear                 |                                  X                    X                 X|             
 _____________________________________________________________________________________________________________________|             

                                                             Page  56                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 8| 6| 8| 7| 8| 8| 8| 8| 7| 8| 7| 8| 7| 8| 8| 8| 7| 8| 8| 8| 4| 8| 8| 7| 8|             
                             DAY ON TEST   | 5| 4| 9| 4| 9| 9| 9| 9| 8| 1| 7| 1| 1| 9| 9| 9| 3| 4| 9| 6| 0| 9| 9| 2| 3|             
                                           | 8| 8| 8| 4| 9| 8| 9| 8| 8| 7| 7| 7| 7| 9| 8| 9| 8| 9| 8| 1| 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| 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   | 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6|             
    0.0%                                   | 5| 5| 5| 5| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 8|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 URINARY SYSTEM - cont                     |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Urinary Bladder                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                          X               |             
 _____________________________________________________________________________________________________________________|             
 SYSTEMIC LESIONS                          |                                                                          |             
                                            __________________________________________________________________________|             
   Multiple Organs                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |          X  X        X     X     X           X  X     X  X              X|             
 _____________________________________________________________________________________________________________________|             

                                                             Page  57                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 8| 8| 6| 8| 8| 8| 6| 7| 8| 5|                                            |            |
                             DAY ON TEST   | 9| 1| 0| 9| 9| 9| 6| 3| 9| 2|                                            |            |
                                           | 8| 0| 0| 9| 9| 9| 8| 8| 8| 3|                                            |            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 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|                                            |     T      |
                               ANIMAL ID   | 6| 6| 6| 6| 6| 6| 6| 6| 6| 6|                                            |     A      |
    0.0%                                   | 8| 8| 8| 8| 8| 8| 8| 8| 8| 9|                                            |     L      |
                                           | 1| 2| 3| 4| 5| 6| 7| 8| 9| 0|                                            |            |
 __________________________________________________________________________________________________________________________________ 
 ALIMENTARY SYSTEM                         |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Esophagus                               | +  +  +  +  +  +  +  +  +  +                                             |  59        |
                                            __________________________________________________________________________|____________|
   Intestine Large, Colon                  | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 |                                                                          |          2 |
                                            __________________________________________________________________________|____________|
   Intestine Large, Rectum                 | +  +  +  +  +  +  +  +  +  +                                             |  60        |
                                            __________________________________________________________________________|____________|
   Intestine Large, Cecum                  | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 |                                                                          |          2 |
                                            __________________________________________________________________________|____________|
   Intestine Small, Duodenum               | +  +  +  +  +  +  +  +  +  +                                             |  60        |
                                            __________________________________________________________________________|____________|
   Intestine Small, Jejunum                | +  +  +  +  +  +  +  +  +  +                                             |  60        |
                                            __________________________________________________________________________|____________|
   Intestine Small, Ileum                  | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Liver                                   | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Fibrous Histiocytoma, Metastatic,    |                                                                          |            |
           Skin                            |                                                                          |          1 |
      Leukemia Mononuclear                 | X  X                 X                                                   |         25 |
                                            __________________________________________________________________________|____________|
   Mesentery                               |                                                                          |   5        |
      Leukemia Mononuclear                 |                                                                          |          2 |
                                            __________________________________________________________________________|____________|
   Pancreas                                | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 |    X                                                                     |          6 |
                                            __________________________________________________________________________|____________|
   Salivary Glands                         | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Carcinoma                            |                                                                          |          1 |
      Leukemia Mononuclear                 |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Stomach, Forestomach                    | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 |                                                                          |          3 |
                                            __________________________________________________________________________|____________|
   Stomach, Glandular                      | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 |                                                                          |          4 |
 _____________________________________________________________________________________________________________________|            |
 CARDIOVASCULAR SYSTEM                     |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Blood Vessel                            | +  +  +  +  +  +  +  +  +  +                                             |  60        |
                                            __________________________________________________________________________|____________|
   Heart                                   | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 |    X                                                                     |          6 |
 _____________________________________________________________________________________________________________________|            |
 ENDOCRINE SYSTEM                          |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Adrenal Cortex                          | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 |    X                                                                     |         14 |
                                            __________________________________________________________________________|____________|
   Adrenal Medulla                         | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 |    X                                                                     |          8 |
      Pheochromocytoma Malignant           |                                                                          |          1 |
      Pheochromocytoma Benign              |                                                                          |          2 |
                                            __________________________________________________________________________|____________|
   Islets, Pancreatic                      | +  +  +  +  +  +  +  +  +  +                                             |  60        |
 __________________________________________________________________________________________________________________________________ 

                         * : 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  58                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 8| 8| 6| 8| 8| 8| 6| 7| 8| 5|                                            |            |
                             DAY ON TEST   | 9| 1| 0| 9| 9| 9| 6| 3| 9| 2|                                            |            |
                                           | 8| 0| 0| 9| 9| 9| 8| 8| 8| 3|                                            |            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 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|                                            |     T      |
                               ANIMAL ID   | 6| 6| 6| 6| 6| 6| 6| 6| 6| 6|                                            |     A      |
    0.0%                                   | 8| 8| 8| 8| 8| 8| 8| 8| 8| 9|                                            |     L      |
                                           | 1| 2| 3| 4| 5| 6| 7| 8| 9| 0|                                            |            |
 __________________________________________________________________________________________________________________________________ 
 ENDOCRINE SYSTEM - cont                   |                                                                          |            |
                                           |                                                                          |            |
      Adenoma                              |                X                                                         |          1 |
                                            __________________________________________________________________________|____________|
   Parathyroid Gland                       | +  +  +  +  +  +  +  +  M  +                                             |  55        |
      Adenoma                              |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Pituitary Gland                         | +  +  +  +  +  +  +  +  +  +                                             |  59        |
      Leukemia Mononuclear                 |                                                                          |          5 |
      Pars Distalis, Adenoma               | X     X        X  X  X     X                                             |         31 |
      Pars Distalis, Carcinoma             |                                                                          |          2 |
                                            __________________________________________________________________________|____________|
   Thyroid Gland                           | +  +  +  +  +  +  +  +  +  +                                             |  59        |
      C-Cell, Adenoma                      |                                                                          |          6 |
      C-Cell, Carcinoma                    |                                                                          |          2 |
      Follicular Cell, Carcinoma           |                                                                          |          1 |
 _____________________________________________________________________________________________________________________|            |
 GENERAL BODY SYSTEM                       |                                                                          |            |
                                           |                                                                          |            |
    None                                   |                                                                          |            |
 _____________________________________________________________________________________________________________________|            |
 GENITAL SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Clitoral Gland                          | +  +  +  +  +  +  +  +  +  +                                             |  59        |
      Adenoma                              |                                                                          |          3 |
      Adenoma, Multiple                    |                                                                          |          1 |
      Carcinoma                            |                                                                          |          1 |
      Carcinoma, Multiple                  |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Ovary                                   | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 |    X                                                                     |          3 |
                                            __________________________________________________________________________|____________|
   Uterus                                  | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 |    X                                                                     |          3 |
      Polyp Stromal                        |    X                                                                     |          9 |
      Sarcoma Stromal                      |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Vagina                                  |                                                                          |            |
 _____________________________________________________________________________________________________________________|            |
 HEMATOPOIETIC SYSTEM                      |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Bone Marrow                             | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 |    X                                                                     |         14 |
                                            __________________________________________________________________________|____________|
   Lymph Node                              |    +                                                                     |  14        |
      Mediastinal, Leukemia Mononuclear    |                                                                          |          7 |
      Pancreatic, Leukemia Mononuclear     |    X                                                                     |          5 |
      Renal, Leukemia Mononuclear          |    X                                                                     |          4 |
                                            __________________________________________________________________________|____________|
   Lymph Node, Mandibular                  | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 | X  X                                                                     |         17 |
                                            __________________________________________________________________________|____________|
   Lymph Node, Mesenteric                  | +  +  +  +  +  +  +  +  +  +                                             |  59        |
 __________________________________________________________________________________________________________________________________ 

                         * : 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  59                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 8| 8| 6| 8| 8| 8| 6| 7| 8| 5|                                            |            |
                             DAY ON TEST   | 9| 1| 0| 9| 9| 9| 6| 3| 9| 2|                                            |            |
                                           | 8| 0| 0| 9| 9| 9| 8| 8| 8| 3|                                            |            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 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|                                            |     T      |
                               ANIMAL ID   | 6| 6| 6| 6| 6| 6| 6| 6| 6| 6|                                            |     A      |
    0.0%                                   | 8| 8| 8| 8| 8| 8| 8| 8| 8| 9|                                            |     L      |
                                           | 1| 2| 3| 4| 5| 6| 7| 8| 9| 0|                                            |            |
 __________________________________________________________________________________________________________________________________ 
 HEMATOPOIETIC SYSTEM - cont               |                                                                          |            |
                                           |                                                                          |            |
      Leukemia Mononuclear                 | X  X                                                                     |         17 |
                                            __________________________________________________________________________|____________|
   Spleen                                  | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 | X  X                 X                                                   |         25 |
                                            __________________________________________________________________________|____________|
   Thymus                                  | +  +  +  +  +  +  +  +  +  +                                             |  56        |
      Fibrous Histiocytoma, Metastatic,    |                                                                          |            |
           Skin                            |                                                                          |          1 |
      Leukemia Mononuclear                 |    X                                                                     |          7 |
 _____________________________________________________________________________________________________________________|            |
 INTEGUMENTARY SYSTEM                      |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Mammary Gland                           | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Adenoma                              |                   X                                                      |          3 |
      Carcinoma                            |                                                                          |          1 |
      Fibroadenoma                         | X     X                 X                                                |         21 |
      Fibroadenoma, Multiple               |                                                                          |          2 |
                                            __________________________________________________________________________|____________|
   Skin                                    | +  +  +  +  +  +  +  +  +  +                                             |  59        |
      Keratoacanthoma                      |                                                                          |          1 |
      Subcutaneous Tissue, Fibroma         |                      X                                                   |          2 |
      Subcutaneous Tissue, Fibrous         |                                                                          |            |
          Histiocytoma                     |                                                                          |          1 |
      Subcutaneous Tissue, Schwannoma      |                                                                          |            |
          Benign                           |                                                                          |          1 |
 _____________________________________________________________________________________________________________________|            |
 MUSCULOSKELETAL SYSTEM                    |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Bone                                    | +  +  +  +  +  +  +  +  +  +                                             |  60        |
                                            __________________________________________________________________________|____________|
   Skeletal Muscle                         |                                                                          |   1        |
      Fibrous Histiocytoma, Metastatic,    |                                                                          |            |
           Skin                            |                                                                          |          1 |
 _____________________________________________________________________________________________________________________|            |
 NERVOUS SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Brain                                   | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Carcinoma, Metastatic, Pituitary     |                                                                          |            |
          Gland                            |                                                                          |          1 |
      Leukemia Mononuclear                 |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Peripheral Nerve                        |                                                                          |   1        |
                                            __________________________________________________________________________|____________|
   Spinal Cord                             |                                                                          |   1        |
      Leukemia Mononuclear                 |                                                                          |          1 |
 _____________________________________________________________________________________________________________________|            |
 RESPIRATORY SYSTEM                        |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Lung                                    | +  +  +  +  +  +  +  +  +  +                                             |  60        |
 __________________________________________________________________________________________________________________________________ 

                         * : 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  60                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 8| 8| 6| 8| 8| 8| 6| 7| 8| 5|                                            |            |
                             DAY ON TEST   | 9| 1| 0| 9| 9| 9| 6| 3| 9| 2|                                            |            |
                                           | 8| 0| 0| 9| 9| 9| 8| 8| 8| 3|                                            |            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 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|                                            |     T      |
                               ANIMAL ID   | 6| 6| 6| 6| 6| 6| 6| 6| 6| 6|                                            |     A      |
    0.0%                                   | 8| 8| 8| 8| 8| 8| 8| 8| 8| 9|                                            |     L      |
                                           | 1| 2| 3| 4| 5| 6| 7| 8| 9| 0|                                            |            |
 __________________________________________________________________________________________________________________________________ 
 RESPIRATORY SYSTEM - cont                 |                                                                          |            |
                                           |                                                                          |            |
      Fibrous Histiocytoma, Metastatic,    |                                                                          |            |
           Skin                            |                                                                          |          1 |
      Leukemia Mononuclear                 |    X                                                                     |         10 |
                                            __________________________________________________________________________|____________|
   Nose                                    | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Trachea                                 | +  +  +  +  +  +  +  +  +  +                                             |  59        |
 _____________________________________________________________________________________________________________________|            |
 SPECIAL SENSES SYSTEM                     |                                                                          |            |
                                           |                                                                          |            |
    None                                   |                                                                          |            |
 _____________________________________________________________________________________________________________________|            |
 URINARY SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Kidney                                  | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Fibrous Histiocytoma, Metastatic,    |                                                                          |            |
           Skin                            |                                                                          |          1 |
      Leukemia Mononuclear                 |    X                                                                     |         11 |
                                            __________________________________________________________________________|____________|
   Urinary Bladder                         | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 |                                                                          |          2 |
 __________________________________________________________________________________________________________________________________ 
 SYSTEMIC LESIONS                          |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Multiple Organs                         | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 | X  X                 X                                                   |         25 |
 __________________________________________________________________________________________________________________________________ 

                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  

                                                             Page  61                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 6| 8| 7| 8| 6| 6| 6| 8| 6| 7| 8| 8| 8| 7| 6| 4| 6| 6| 7| 5| 7| 6| 7| 4| 6|             
                             DAY ON TEST   | 4| 0| 5| 3| 8| 2| 5| 0| 8| 1| 5| 5| 5| 0| 7| 9| 1| 7| 3| 5| 8| 9| 5| 8| 1|             
                                           | 2| 7| 9| 1| 7| 2| 9| 8| 7| 0| 7| 7| 7| 8| 4| 9| 8| 4| 8| 6| 5| 4| 2| 9| 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   | 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|             
    UNTREATD                               | 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|             
 _____________________________________________________________________________________________________________________|             
 ALIMENTARY SYSTEM                         |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Esophagus                               | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Large, Colon                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |             X                                         X                  |             
                                            __________________________________________________________________________|             
   Intestine Large, Rectum                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Large, Cecum                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |             X                                                            |             
                                            __________________________________________________________________________|             
   Intestine Small, Duodenum               | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Small, Jejunum                | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                       X                  |             
                                            __________________________________________________________________________|             
   Intestine Small, Ileum                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                       X                  |             
                                            __________________________________________________________________________|             
   Liver                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Hepatocellular Adenoma               | X                                                                        |             
      Histiocytic Sarcoma                  |                                                                          |             
      Leukemia Mononuclear                 | X     X     X  X  X  X  X  X        X  X  X        X  X     X  X  X      |             
      Lymphoma Malignant                   |          X                                                               |             
                                            __________________________________________________________________________|             
   Mesentery                               |          +  +              +  +           +              +           +  +|             
      Histiocytic Sarcoma                  |                                                                          |             
      Leukemia Mononuclear                 |             X              X                                             |             
      Lymphoma Malignant                   |          X                                                               |             
      Schwannoma Malignant                 |                                                                         X|             
                                            __________________________________________________________________________|             
   Oral Mucosa                             |                                                                      +   |             
      Squamous Cell Carcinoma              |                                                                      X   |             
                                            __________________________________________________________________________|             
   Pancreas                                | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X           X                                         X                  |             
      Lymphoma Malignant                   |          X                                                               |             
      Acinus, Adenoma                      |                               X     X                                    |             
                                            __________________________________________________________________________|             
   Salivary Glands                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                           X                              |             
                                            __________________________________________________________________________|             
   Stomach, Forestomach                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |             X              X                          X                  |             
      Lymphoma Malignant                   |          X                                                               |             
                                            __________________________________________________________________________|             
   Stomach, Glandular                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X           X                             X           X                  |             
                                            __________________________________________________________________________|             
   Tongue                                  |                                                                          |             
      Squamous Cell Carcinoma              |                                                                          |             
                                            __________________________________________________________________________|             
   Tooth                                   |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 CARDIOVASCULAR SYSTEM                     |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Blood Vessel                            | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Heart                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X           X  X  X        X           X              X                  |             
      Schwannoma Malignant                 |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 ENDOCRINE SYSTEM                          |                                                                          |             
 _____________________________________________________________________________________________________________________|             

                                                             Page  62                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 6| 8| 7| 8| 6| 6| 6| 8| 6| 7| 8| 8| 8| 7| 6| 4| 6| 6| 7| 5| 7| 6| 7| 4| 6|             
                             DAY ON TEST   | 4| 0| 5| 3| 8| 2| 5| 0| 8| 1| 5| 5| 5| 0| 7| 9| 1| 7| 3| 5| 8| 9| 5| 8| 1|             
                                           | 2| 7| 9| 1| 7| 2| 9| 8| 7| 0| 7| 7| 7| 8| 4| 9| 8| 4| 8| 6| 5| 4| 2| 9| 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   | 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|             
    UNTREATD                               | 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|             
 _____________________________________________________________________________________________________________________|             
 ENDOCRINE SYSTEM - cont                   |                                                                          |             
                                           |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Adrenal Cortex                          | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |                                                                          |             
      Leukemia Mononuclear                 |       X     X     X  X     X           X  X           X     X  X         |             
                                            __________________________________________________________________________|             
   Adrenal Medulla                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X     X     X     X  X     X           X              X     X  X         |             
      Pheochromocytoma Malignant           |                            X                                             |             
      Pheochromocytoma Benign              |    X     X                 X  X                                          |             
      Pheochromocytoma Benign, Multiple    |                                                                          |             
                                            __________________________________________________________________________|             
   Islets, Pancreatic                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |          X                                                               |             
      Carcinoma                            |                                     X                                    |             
                                            __________________________________________________________________________|             
   Parathyroid Gland                       | +  M  +  M  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Pituitary Gland                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                   X        X              X                 X  X         |             
      Pars Distalis, Adenoma               | X              X  X     X                                                |             
                                            __________________________________________________________________________|             
   Thyroid Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      C-Cell, Adenoma                      |    X  X                                                                  |             
 _____________________________________________________________________________________________________________________|             
 GENERAL BODY SYSTEM                       |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Peritoneum                              |                                                                          |             
      Mesothelioma Malignant               |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 GENITAL SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Epididymis                              | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Preputial Gland                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |                         X                                                |             
      Carcinoma                            |                                                 X                        |             
      Leukemia Mononuclear                 |             X                             X           X                  |             
                                            __________________________________________________________________________|             
   Prostate                                | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |                               X                                          |             
      Leukemia Mononuclear                 | X                                                     X     X            |             
      Lymphoma Malignant                   |          X                                                               |             
                                            __________________________________________________________________________|             
   Seminal Vesicle                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X                                                                        |             
                                            __________________________________________________________________________|             
   Testes                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Bilateral, Interstitial Cell, Adenoma|    X     X  X     X  X     X  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        X  X  X        X  X     X  X         |             
      Lymphoma Malignant                   |          X                                                               |             
                                            __________________________________________________________________________|             
   Lymph Node                              |       +  +  +  +  +  +              +  +  +     +     +  +  +            |             
 _____________________________________________________________________________________________________________________|             

                                                             Page  63                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 6| 8| 7| 8| 6| 6| 6| 8| 6| 7| 8| 8| 8| 7| 6| 4| 6| 6| 7| 5| 7| 6| 7| 4| 6|             
                             DAY ON TEST   | 4| 0| 5| 3| 8| 2| 5| 0| 8| 1| 5| 5| 5| 0| 7| 9| 1| 7| 3| 5| 8| 9| 5| 8| 1|             
                                           | 2| 7| 9| 1| 7| 2| 9| 8| 7| 0| 7| 7| 7| 8| 4| 9| 8| 4| 8| 6| 5| 4| 2| 9| 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   | 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|             
    UNTREATD                               | 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|             
 _____________________________________________________________________________________________________________________|             
 HEMATOPOIETIC SYSTEM - cont               |                                                                          |             
                                           |                                                                          |             
      Leukemia Mononuclear                 |                                                                          |             
      Deep Cervical, Leukemia Mononuclear  |                                           X                              |             
      Iliac, Leukemia Mononuclear          |                                           X                              |             
      Inguinal, Leukemia Mononuclear       |                                                             X            |             
      Mediastinal, Leukemia Mononuclear    |       X     X  X  X                    X  X           X     X            |             
      Pancreatic, Leukemia Mononuclear     |             X     X  X              X  X  X           X     X            |             
      Pancreatic, Lymphoma Malignant       |          X                                                               |             
      Popliteal, Leukemia Mononuclear      |                                                                          |             
      Renal, Leukemia Mononuclear          |                      X                    X                 X            |             
                                            __________________________________________________________________________|             
   Lymph Node, Mandibular                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X     X     X  X  X  X              X  X  X        X  X     X  X         |             
      Lymphoma Malignant                   |          X                                                               |             
                                            __________________________________________________________________________|             
   Lymph Node, Mesenteric                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X     X     X  X  X  X     X        X  X  X        X  X     X  X         |             
      Lymphoma Malignant                   |          X                                                               |             
                                            __________________________________________________________________________|             
   Spleen                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Fibroma                              |                                                                          |             
      Histiocytic Sarcoma                  |                                                                          |             
      Leukemia Mononuclear                 | X     X     X  X  X  X  X  X        X  X  X        X  X     X  X  X      |             
      Sarcoma                              |                                                                          |             
                                            __________________________________________________________________________|             
   Thymus                                  | +  +  +  +  +  +  +  M  +  +  +  M  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |             X                             X        X  X     X            |             
      Lymphoma Malignant                   |          X                                                               |             
 _____________________________________________________________________________________________________________________|             
 INTEGUMENTARY SYSTEM                      |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Mammary Gland                           | +  +  +  +  M  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |                                                                          |             
      Fibroadenoma                         |                      X              X                                    |             
      Fibroadenoma, Multiple               |                                                                          |             
                                            __________________________________________________________________________|             
   Skin                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Basal Cell Carcinoma                 |                                                                          |             
      Keratoacanthoma                      |                               X  X                                       |             
      Keratoacanthoma, Multiple            |                         X                                                |             
      Squamous Cell Papilloma              |                                                                          |             
      Trichoepithelioma                    |       X                                                                  |             
      Sebaceous Gland, Adenoma             |                                                                          |             
      Subcutaneous Tissue, Fibroma         |          X                                                               |             
      Subcutaneous Tissue, Fibroma,        |                                                                          |             
          Multiple                         |                                                                          |             
      Subcutaneous Tissue, Fibrosarcoma    |                                  X                                       |             
      Subcutaneous Tissue, Hemangioma      |                                                                          |             
      Subcutaneous Tissue, Hemangiosarcoma |                                                                          |             
      Subcutaneous Tissue, Schwannoma      |                                                                          |             
          Benign                           |                                                                          |             
 _____________________________________________________________________________________________________________________|             

                                                             Page  64                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 6| 8| 7| 8| 6| 6| 6| 8| 6| 7| 8| 8| 8| 7| 6| 4| 6| 6| 7| 5| 7| 6| 7| 4| 6|             
                             DAY ON TEST   | 4| 0| 5| 3| 8| 2| 5| 0| 8| 1| 5| 5| 5| 0| 7| 9| 1| 7| 3| 5| 8| 9| 5| 8| 1|             
                                           | 2| 7| 9| 1| 7| 2| 9| 8| 7| 0| 7| 7| 7| 8| 4| 9| 8| 4| 8| 6| 5| 4| 2| 9| 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   | 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|             
    UNTREATD                               | 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|             
 _____________________________________________________________________________________________________________________|             
 INTEGUMENTARY SYSTEM - cont               |                                                                          |             
                                           |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 MUSCULOSKELETAL SYSTEM                    |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Bone                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             
 NERVOUS SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Brain                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Astrocytoma Malignant                |                                                          X               |             
      Leukemia Mononuclear                 |                   X                                                      |             
      Oligodendroglioma Malignant          |                                                                          |             
                                            __________________________________________________________________________|             
   Peripheral Nerve                        |                                                                   +      |             
                                            __________________________________________________________________________|             
   Spinal Cord                             |                                                                   +      |             
      Leukemia Mononuclear                 |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 RESPIRATORY SYSTEM                        |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Lung                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Alveolar/Bronchiolar Adenoma         |                                                 X                        |             
      Histiocytic Sarcoma                  |                                                                          |             
      Leukemia Mononuclear                 |       X     X     X  X                 X  X           X                  |             
      Lymphoma Malignant                   |          X                                                               |             
                                            __________________________________________________________________________|             
   Nose                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Squamous Cell Papilloma              |    X                                                                     |             
                                            __________________________________________________________________________|             
   Trachea                                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             
 SPECIAL SENSES SYSTEM                     |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Eye                                     |                               +  +                                   +   |             
                                            __________________________________________________________________________|             
   Zymbal's Gland                          |    +                                                                     |             
      Carcinoma                            |    X                                                                     |             
 _____________________________________________________________________________________________________________________|             
 URINARY SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Kidney                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X     X     X  X  X  X     X        X  X  X           X     X  X         |             
      Lipoma                               |                                                                          |             
      Lymphoma Malignant                   |          X                                                               |             
      Renal Tubule, Adenoma                |                                                                X         |             
      Transitional Epithelium, Carcinoma   |                                                                          |             
                                            __________________________________________________________________________|             
   Urethra                                 |                                                                      +   |             
                                            __________________________________________________________________________|             
   Urinary Bladder                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                       X     X            |             
 _____________________________________________________________________________________________________________________|             
 SYSTEMIC LESIONS                          |                                                                          |             
                                            __________________________________________________________________________|             
   Multiple Organs                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Histiocytic Sarcoma                  |                                                                          |             
      Leukemia Mononuclear                 | X     X     X  X  X  X  X  X        X  X  X        X  X     X  X  X      |             
      Lymphoma Malignant                   |          X                                                               |             
      Mesothelioma Malignant               |                                                                          |             
 _____________________________________________________________________________________________________________________|             

                                                             Page  65                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 7| 6| 6| 7| 7| 7| 7| 7| 7| 6| 7| 5| 7| 8| 8| 7| 8| 6| 5| 8| 5| 7| 5| 7| 6|             
                             DAY ON TEST   | 3| 7| 7| 8| 5| 7| 5| 8| 0| 6| 5| 6| 6| 5| 5| 5| 5| 2| 3| 5| 4| 1| 2| 0| 6|             
                                           | 0| 4| 3| 6| 8| 4| 0| 6| 4| 7| 2| 3| 1| 7| 7| 7| 7| 6| 4| 7| 4| 9| 8| 5| 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   | 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|             
    UNTREATD                               | 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|             
     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|             
 _____________________________________________________________________________________________________________________|             
 ALIMENTARY SYSTEM                         |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Esophagus                               | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Large, Colon                  | +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Intestine Large, Rectum                 | +  +  M  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Large, Cecum                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                       X                  |             
                                            __________________________________________________________________________|             
   Intestine Small, Duodenum               | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Small, Jejunum                | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                       X                  |             
                                            __________________________________________________________________________|             
   Intestine Small, Ileum                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                       X        X         |             
                                            __________________________________________________________________________|             
   Liver                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Hepatocellular Adenoma               |          X                                X                              |             
      Histiocytic Sarcoma                  |                                  X                                       |             
      Leukemia Mononuclear                 |    X  X  X  X  X  X  X  X  X        X     X     X     X  X  X  X        X|             
      Lymphoma Malignant                   |                                                                          |             
                                            __________________________________________________________________________|             
   Mesentery                               |                         +  +     +                 +     +     +        +|             
      Histiocytic Sarcoma                  |                                  X                                       |             
      Leukemia Mononuclear                 |                                                                          |             
      Lymphoma Malignant                   |                                                                          |             
      Schwannoma Malignant                 |                                                                          |             
                                            __________________________________________________________________________|             
   Oral Mucosa                             |                                                                          |             
      Squamous Cell Carcinoma              |                                                                          |             
                                            __________________________________________________________________________|             
   Pancreas                                | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                   X                                                      |             
      Lymphoma Malignant                   |                                                                          |             
      Acinus, Adenoma                      |                                                          X               |             
                                            __________________________________________________________________________|             
   Salivary Glands                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Stomach, Forestomach                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                          |             
      Lymphoma Malignant                   |                                                                          |             
                                            __________________________________________________________________________|             
   Stomach, Glandular                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                X                                                         |             
                                            __________________________________________________________________________|             
   Tongue                                  |                +                                                         |             
      Squamous Cell Carcinoma              |                X                                                         |             
                                            __________________________________________________________________________|             
   Tooth                                   |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 CARDIOVASCULAR SYSTEM                     |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Blood Vessel                            | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Heart                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |             X  X  X     X  X              X                 X            |             
      Schwannoma Malignant                 |    X                                                                     |             
 _____________________________________________________________________________________________________________________|             
 ENDOCRINE SYSTEM                          |                                                                          |             
 _____________________________________________________________________________________________________________________|             

                                                             Page  66                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 7| 6| 6| 7| 7| 7| 7| 7| 7| 6| 7| 5| 7| 8| 8| 7| 8| 6| 5| 8| 5| 7| 5| 7| 6|             
                             DAY ON TEST   | 3| 7| 7| 8| 5| 7| 5| 8| 0| 6| 5| 6| 6| 5| 5| 5| 5| 2| 3| 5| 4| 1| 2| 0| 6|             
                                           | 0| 4| 3| 6| 8| 4| 0| 6| 4| 7| 2| 3| 1| 7| 7| 7| 7| 6| 4| 7| 4| 9| 8| 5| 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   | 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|             
    UNTREATD                               | 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|             
     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|             
 _____________________________________________________________________________________________________________________|             
 ENDOCRINE SYSTEM - cont                   |                                                                          |             
                                           |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Adrenal Cortex                          | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |          X                                                               |             
      Leukemia Mononuclear                 |       X  X     X  X     X  X              X     X     X  X  X  X         |             
                                            __________________________________________________________________________|             
   Adrenal Medulla                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |    X  X  X     X  X     X  X              X           X  X  X  X         |             
      Pheochromocytoma Malignant           |                                                                          |             
      Pheochromocytoma Benign              |                         X  X                 X                 X         |             
      Pheochromocytoma Benign, Multiple    |                                                          X               |             
                                            __________________________________________________________________________|             
   Islets, Pancreatic                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |                X           X                                             |             
      Carcinoma                            |                                                                          |             
                                            __________________________________________________________________________|             
   Parathyroid Gland                       | M  +  +  +  +  M  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Pituitary Gland                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |          X     X  X                                         X  X         |             
      Pars Distalis, Adenoma               | X  X     X           X     X  X     X     X  X                    X      |             
                                            __________________________________________________________________________|             
   Thyroid Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      C-Cell, Adenoma                      | X                 X                                                      |             
 _____________________________________________________________________________________________________________________|             
 GENERAL BODY SYSTEM                       |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Peritoneum                              |                                                                          |             
      Mesothelioma Malignant               |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 GENITAL SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Epididymis                              | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Preputial Gland                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |                               X        X                 X        X      |             
      Carcinoma                            |                                                                          |             
      Leukemia Mononuclear                 |                X  X                                                      |             
                                            __________________________________________________________________________|             
   Prostate                                | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |                                        X                                 |             
      Leukemia Mononuclear                 |                                                                          |             
      Lymphoma Malignant                   |                                                                          |             
                                            __________________________________________________________________________|             
   Seminal Vesicle                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Testes                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Bilateral, Interstitial Cell, Adenoma|    X        X  X  X  X  X  X  X  X  X  X  X  X  X  X     X  X  X     X  X|             
      Interstitial Cell, Adenoma           | X     X                                               X                  |             
 _____________________________________________________________________________________________________________________|             
 HEMATOPOIETIC SYSTEM                      |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Bone Marrow                             | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |    X     X  X  X  X     X  X        X     X           X  X  X  X        X|             
      Lymphoma Malignant                   |                                                                          |             
                                            __________________________________________________________________________|             
   Lymph Node                              |    +     +  +  +  +        +     +  +                    +  +  +     +  +|             
 _____________________________________________________________________________________________________________________|             

                                                             Page  67                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 7| 6| 6| 7| 7| 7| 7| 7| 7| 6| 7| 5| 7| 8| 8| 7| 8| 6| 5| 8| 5| 7| 5| 7| 6|             
                             DAY ON TEST   | 3| 7| 7| 8| 5| 7| 5| 8| 0| 6| 5| 6| 6| 5| 5| 5| 5| 2| 3| 5| 4| 1| 2| 0| 6|             
                                           | 0| 4| 3| 6| 8| 4| 0| 6| 4| 7| 2| 3| 1| 7| 7| 7| 7| 6| 4| 7| 4| 9| 8| 5| 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   | 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|             
    UNTREATD                               | 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|             
     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|             
 _____________________________________________________________________________________________________________________|             
 HEMATOPOIETIC SYSTEM - cont               |                                                                          |             
                                           |                                                                          |             
      Leukemia Mononuclear                 |                X                                                         |             
      Deep Cervical, Leukemia Mononuclear  |                X                                               X        X|             
      Iliac, Leukemia Mononuclear          |                                                                          |             
      Inguinal, Leukemia Mononuclear       |                                                                          |             
      Mediastinal, Leukemia Mononuclear    |    X     X  X  X           X        X                    X  X  X        X|             
      Pancreatic, Leukemia Mononuclear     |    X        X  X           X                                X  X        X|             
      Pancreatic, Lymphoma Malignant       |                                                                          |             
      Popliteal, Leukemia Mononuclear      |                X                                                         |             
      Renal, Leukemia Mononuclear          |    X           X                                               X         |             
                                            __________________________________________________________________________|             
   Lymph Node, Mandibular                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |    X  X  X  X  X  X  X  X  X        X     X     X     X  X  X  X        X|             
      Lymphoma Malignant                   |                                                                          |             
                                            __________________________________________________________________________|             
   Lymph Node, Mesenteric                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |    X     X     X  X     X                 X           X  X  X  X         |             
      Lymphoma Malignant                   |                                                                          |             
                                            __________________________________________________________________________|             
   Spleen                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Fibroma                              |                                                          X               |             
      Histiocytic Sarcoma                  |                                  X                                       |             
      Leukemia Mononuclear                 |    X  X  X  X  X  X  X  X  X        X     X     X     X  X  X  X        X|             
      Sarcoma                              |                   X                                                      |             
                                            __________________________________________________________________________|             
   Thymus                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |       X  X     X                                               X         |             
      Lymphoma Malignant                   |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 INTEGUMENTARY SYSTEM                      |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Mammary Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +  +|             
      Adenoma                              |                                                                         X|             
      Fibroadenoma                         | X                    X                    X     X        X               |             
      Fibroadenoma, Multiple               |                                        X                                 |             
                                            __________________________________________________________________________|             
   Skin                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Basal Cell Carcinoma                 |                                     X                                    |             
      Keratoacanthoma                      |                            X                                             |             
      Keratoacanthoma, Multiple            |                                                                          |             
      Squamous Cell Papilloma              |                                                                          |             
      Trichoepithelioma                    |                                                                          |             
      Sebaceous Gland, Adenoma             |                                                                         X|             
      Subcutaneous Tissue, Fibroma         |                                     X           X                        |             
      Subcutaneous Tissue, Fibroma,        |                                                                          |             
          Multiple                         |                X                                                         |             
      Subcutaneous Tissue, Fibrosarcoma    |                                                                          |             
      Subcutaneous Tissue, Hemangioma      |                                           X                              |             
      Subcutaneous Tissue, Hemangiosarcoma |                                                    X                     |             
      Subcutaneous Tissue, Schwannoma      |                                                                          |             
          Benign                           |                X                                                         |             
 _____________________________________________________________________________________________________________________|             

                                                             Page  68                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 7| 6| 6| 7| 7| 7| 7| 7| 7| 6| 7| 5| 7| 8| 8| 7| 8| 6| 5| 8| 5| 7| 5| 7| 6|             
                             DAY ON TEST   | 3| 7| 7| 8| 5| 7| 5| 8| 0| 6| 5| 6| 6| 5| 5| 5| 5| 2| 3| 5| 4| 1| 2| 0| 6|             
                                           | 0| 4| 3| 6| 8| 4| 0| 6| 4| 7| 2| 3| 1| 7| 7| 7| 7| 6| 4| 7| 4| 9| 8| 5| 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   | 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|             
    UNTREATD                               | 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|             
     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|             
 _____________________________________________________________________________________________________________________|             
 INTEGUMENTARY SYSTEM - cont               |                                                                          |             
                                           |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 MUSCULOSKELETAL SYSTEM                    |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Bone                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             
 NERVOUS SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Brain                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Astrocytoma Malignant                |                                                                          |             
      Leukemia Mononuclear                 |                                                                          |             
      Oligodendroglioma Malignant          |                                                                X         |             
                                            __________________________________________________________________________|             
   Peripheral Nerve                        |                                                                          |             
                                            __________________________________________________________________________|             
   Spinal Cord                             |                                                                          |             
      Leukemia Mononuclear                 |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 RESPIRATORY SYSTEM                        |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Lung                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Alveolar/Bronchiolar Adenoma         |                      X                                                  X|             
      Histiocytic Sarcoma                  |                                  X                                       |             
      Leukemia Mononuclear                 |    X  X  X  X  X           X                          X  X  X  X        X|             
      Lymphoma Malignant                   |                                                                          |             
                                            __________________________________________________________________________|             
   Nose                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Squamous Cell Papilloma              |                                                                          |             
                                            __________________________________________________________________________|             
   Trachea                                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             
 SPECIAL SENSES SYSTEM                     |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Eye                                     |                                                    +                     |             
                                            __________________________________________________________________________|             
   Zymbal's Gland                          |                                                                          |             
      Carcinoma                            |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 URINARY SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Kidney                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |    X     X     X  X     X  X                             X  X  X        X|             
      Lipoma                               |                                                                   X      |             
      Lymphoma Malignant                   |                                                                          |             
      Renal Tubule, Adenoma                |                         X                                                |             
      Transitional Epithelium, Carcinoma   |                                                                          |             
                                            __________________________________________________________________________|             
   Urethra                                 |                                                                          |             
                                            __________________________________________________________________________|             
   Urinary Bladder                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 SYSTEMIC LESIONS                          |                                                                          |             
                                            __________________________________________________________________________|             
   Multiple Organs                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Histiocytic Sarcoma                  |                                  X                                       |             
      Leukemia Mononuclear                 |    X  X  X  X  X  X  X  X  X        X     X     X     X  X  X  X        X|             
      Lymphoma Malignant                   |                                                                          |             
      Mesothelioma Malignant               |                                                                          |             
 _____________________________________________________________________________________________________________________|             

                                                             Page  69                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 7| 7| 8| 7| 7| 7| 8| 6| 3| 5|                                            |            |
                             DAY ON TEST   | 8| 9| 2| 7| 2| 3| 5| 7| 8| 0|                                            |            |
                                           | 6| 5| 4| 4| 9| 6| 7| 4| 1| 0|                                            |            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 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|                                            |     T      |
                               ANIMAL ID   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|                                            |     A      |
    UNTREATD                               | 5| 5| 5| 5| 5| 5| 5| 5| 5| 6|                                            |     L      |
     CONTROL                               | 1| 2| 3| 4| 5| 6| 7| 8| 9| 0|                                            |            |
 __________________________________________________________________________________________________________________________________ 
 ALIMENTARY SYSTEM                         |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Esophagus                               | +  +  +  +  +  +  +  +  +  +                                             |  60        |
                                            __________________________________________________________________________|____________|
   Intestine Large, Colon                  | +  +  +  +  +  +  +  +  +  +                                             |  58        |
      Leukemia Mononuclear                 |                                                                          |          2 |
                                            __________________________________________________________________________|____________|
   Intestine Large, Rectum                 | +  +  +  +  +  +  +  +  +  +                                             |  59        |
                                            __________________________________________________________________________|____________|
   Intestine Large, Cecum                  | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 |                                                                          |          2 |
                                            __________________________________________________________________________|____________|
   Intestine Small, Duodenum               | +  +  +  +  +  +  +  +  +  +                                             |  60        |
                                            __________________________________________________________________________|____________|
   Intestine Small, Jejunum                | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 |                                                                          |          2 |
                                            __________________________________________________________________________|____________|
   Intestine Small, Ileum                  | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 |                                                                          |          3 |
                                            __________________________________________________________________________|____________|
   Liver                                   | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Hepatocellular Adenoma               | X                                                                        |          4 |
      Histiocytic Sarcoma                  |                                                                          |          1 |
      Leukemia Mononuclear                 | X        X  X  X     X                                                   |         38 |
      Lymphoma Malignant                   |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Mesentery                               | +     +     +        +     +                                             |  20        |
      Histiocytic Sarcoma                  |                                                                          |          1 |
      Leukemia Mononuclear                 |                                                                          |          2 |
      Lymphoma Malignant                   |                                                                          |          1 |
      Schwannoma Malignant                 |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Oral Mucosa                             |                                                                          |   1        |
      Squamous Cell Carcinoma              |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Pancreas                                | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 |                                                                          |          4 |
      Lymphoma Malignant                   |                                                                          |          1 |
      Acinus, Adenoma                      |                                                                          |          3 |
                                            __________________________________________________________________________|____________|
   Salivary Glands                         | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Stomach, Forestomach                    | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 |                                                                          |          3 |
      Lymphoma Malignant                   |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Stomach, Glandular                      | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 |                                                                          |          5 |
                                            __________________________________________________________________________|____________|
   Tongue                                  |                                                                          |   1        |
      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  70                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 7| 7| 8| 7| 7| 7| 8| 6| 3| 5|                                            |            |
                             DAY ON TEST   | 8| 9| 2| 7| 2| 3| 5| 7| 8| 0|                                            |            |
                                           | 6| 5| 4| 4| 9| 6| 7| 4| 1| 0|                                            |            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 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|                                            |     T      |
                               ANIMAL ID   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|                                            |     A      |
    UNTREATD                               | 5| 5| 5| 5| 5| 5| 5| 5| 5| 6|                                            |     L      |
     CONTROL                               | 1| 2| 3| 4| 5| 6| 7| 8| 9| 0|                                            |            |
 __________________________________________________________________________________________________________________________________ 
 CARDIOVASCULAR SYSTEM - cont              |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Blood Vessel                            | +  +  +  +  +  +  +  +  +  +                                             |  60        |
                                            __________________________________________________________________________|____________|
   Heart                                   | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 | X        X                                                               |         16 |
      Schwannoma Malignant                 |                                                                          |          1 |
 _____________________________________________________________________________________________________________________|            |
 ENDOCRINE SYSTEM                          |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Adrenal Cortex                          | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Adenoma                              |                                                                          |          1 |
      Leukemia Mononuclear                 | X        X  X  X     X                                                   |         27 |
                                            __________________________________________________________________________|____________|
   Adrenal Medulla                         | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 | X        X  X  X     X                                                   |         27 |
      Pheochromocytoma Malignant           |                                                                          |          1 |
      Pheochromocytoma Benign              | X  X     X     X     X                                                   |         13 |
      Pheochromocytoma Benign, Multiple    |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Islets, Pancreatic                      | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Adenoma                              | X                 X                                                      |          5 |
      Carcinoma                            |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Parathyroid Gland                       | +  +  +  +  M  +  +  +  +  +                                             |  55        |
                                            __________________________________________________________________________|____________|
   Pituitary Gland                         | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 | X           X                                                            |         12 |
      Pars Distalis, Adenoma               | X     X  X  X     X                                                      |         19 |
                                            __________________________________________________________________________|____________|
   Thyroid Gland                           | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      C-Cell, Adenoma                      |    X                                                                     |          5 |
 _____________________________________________________________________________________________________________________|            |
 GENERAL BODY SYSTEM                       |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Peritoneum                              |                   +                                                      |   1        |
      Mesothelioma Malignant               |                   X                                                      |          1 |
 _____________________________________________________________________________________________________________________|            |
 GENITAL SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Epididymis                              | +  +  +  +  +  +  +  +  +  +                                             |  60        |
                                            __________________________________________________________________________|____________|
   Preputial Gland                         | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Adenoma                              |                                                                          |          5 |
      Carcinoma                            |                         X                                                |          2 |
      Leukemia Mononuclear                 |                                                                          |          5 |
                                            __________________________________________________________________________|____________|
   Prostate                                | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Adenoma                              |                                                                          |          2 |
      Leukemia Mononuclear                 |                                                                          |          3 |
      Lymphoma Malignant                   |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Seminal Vesicle                         | +  +  +  +  +  +  +  +  +  +                                             |  60        |
 __________________________________________________________________________________________________________________________________ 

                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  

                                                             Page  71                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 7| 7| 8| 7| 7| 7| 8| 6| 3| 5|                                            |            |
                             DAY ON TEST   | 8| 9| 2| 7| 2| 3| 5| 7| 8| 0|                                            |            |
                                           | 6| 5| 4| 4| 9| 6| 7| 4| 1| 0|                                            |            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 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|                                            |     T      |
                               ANIMAL ID   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|                                            |     A      |
    UNTREATD                               | 5| 5| 5| 5| 5| 5| 5| 5| 5| 6|                                            |     L      |
     CONTROL                               | 1| 2| 3| 4| 5| 6| 7| 8| 9| 0|                                            |            |
 __________________________________________________________________________________________________________________________________ 
 GENITAL SYSTEM - cont                     |                                                                          |            |
                                           |                                                                          |            |
      Leukemia Mononuclear                 |             X                                                            |          2 |
                                            __________________________________________________________________________|____________|
   Testes                                  | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Bilateral, Interstitial Cell, Adenoma| X  X  X  X  X     X                                                      |         42 |
      Interstitial Cell, Adenoma           |                X     X     X                                             |         13 |
 _____________________________________________________________________________________________________________________|            |
 HEMATOPOIETIC SYSTEM                      |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Bone Marrow                             | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 | X  X     X  X  X     X                                                   |         31 |
      Lymphoma Malignant                   |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Lymph Node                              |    +  +     +  +  +  +  +                                                |  33        |
      Leukemia Mononuclear                 |             X                                                            |          2 |
      Deep Cervical, Leukemia Mononuclear  |                                                                          |          4 |
      Iliac, Leukemia Mononuclear          |                                                                          |          1 |
      Inguinal, Leukemia Mononuclear       |                                                                          |          1 |
      Mediastinal, Leukemia Mononuclear    |             X                                                            |         19 |
      Pancreatic, Leukemia Mononuclear     |             X  X     X                                                   |         18 |
      Pancreatic, Lymphoma Malignant       |                                                                          |          1 |
      Popliteal, Leukemia Mononuclear      |                                                                          |          1 |
      Renal, Leukemia Mononuclear          |    X        X                                                            |          8 |
                                            __________________________________________________________________________|____________|
   Lymph Node, Mandibular                  | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 | X  X     X  X        X                                                   |         35 |
      Lymphoma Malignant                   |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Lymph Node, Mesenteric                  | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 | X           X                                                            |         26 |
      Lymphoma Malignant                   |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Spleen                                  | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Fibroma                              |    X                                                                     |          2 |
      Histiocytic Sarcoma                  |                                                                          |          1 |
      Leukemia Mononuclear                 | X  X     X  X  X     X                                                   |         39 |
      Sarcoma                              |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Thymus                                  | +  +  +  +  +  +  +  +  +  +                                             |  58        |
      Leukemia Mononuclear                 |             X  X                                                         |         11 |
      Lymphoma Malignant                   |                                                                          |          1 |
 _____________________________________________________________________________________________________________________|            |
 INTEGUMENTARY SYSTEM                      |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Mammary Gland                           | +  +  +  +  +  +  +  +  +  +                                             |  57        |
      Adenoma                              |                                                                          |          1 |
      Fibroadenoma                         |    X                    X                                                |          9 |
      Fibroadenoma, Multiple               |                                                                          |          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  72                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 7| 7| 8| 7| 7| 7| 8| 6| 3| 5|                                            |            |
                             DAY ON TEST   | 8| 9| 2| 7| 2| 3| 5| 7| 8| 0|                                            |            |
                                           | 6| 5| 4| 4| 9| 6| 7| 4| 1| 0|                                            |            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 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|                                            |     T      |
                               ANIMAL ID   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|                                            |     A      |
    UNTREATD                               | 5| 5| 5| 5| 5| 5| 5| 5| 5| 6|                                            |     L      |
     CONTROL                               | 1| 2| 3| 4| 5| 6| 7| 8| 9| 0|                                            |            |
 __________________________________________________________________________________________________________________________________ 
 INTEGUMENTARY SYSTEM - cont               |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Skin                                    | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Basal Cell Carcinoma                 |                                                                          |          1 |
      Keratoacanthoma                      |                                                                          |          3 |
      Keratoacanthoma, Multiple            |                                                                          |          1 |
      Squamous Cell Papilloma              |    X              X                                                      |          2 |
      Trichoepithelioma                    |    X                                                                     |          2 |
      Sebaceous Gland, Adenoma             |                                                                          |          1 |
      Subcutaneous Tissue, Fibroma         |                                                                          |          3 |
      Subcutaneous Tissue, Fibroma,        |                                                                          |            |
          Multiple                         |                                                                          |          1 |
      Subcutaneous Tissue, Fibrosarcoma    |                                                                          |          1 |
      Subcutaneous Tissue, Hemangioma      |                                                                          |          1 |
      Subcutaneous Tissue, Hemangiosarcoma |                                                                          |          1 |
      Subcutaneous Tissue, Schwannoma      |                                                                          |            |
          Benign                           |                                                                          |          1 |
 _____________________________________________________________________________________________________________________|            |
 MUSCULOSKELETAL SYSTEM                    |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Bone                                    | +  +  +  +  +  +  +  +  +  +                                             |  60        |
 _____________________________________________________________________________________________________________________|            |
 NERVOUS SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Brain                                   | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Astrocytoma Malignant                |                                                                          |          1 |
      Leukemia Mononuclear                 | X                                                                        |          2 |
      Oligodendroglioma Malignant          |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Peripheral Nerve                        | +                                                                        |   2        |
                                            __________________________________________________________________________|____________|
   Spinal Cord                             | +                                                                        |   2        |
      Leukemia Mononuclear                 | X                                                                        |          1 |
 _____________________________________________________________________________________________________________________|            |
 RESPIRATORY SYSTEM                        |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Lung                                    | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Alveolar/Bronchiolar Adenoma         |                                                                          |          3 |
      Histiocytic Sarcoma                  |                                                                          |          1 |
      Leukemia Mononuclear                 | X           X        X                                                   |         21 |
      Lymphoma Malignant                   |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Nose                                    | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Squamous Cell Papilloma              |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Trachea                                 | +  +  +  +  +  +  +  +  +  +                                             |  60        |
 _____________________________________________________________________________________________________________________|            |
 SPECIAL SENSES SYSTEM                     |                                                                          |            |
                                           |                                                                          |            |
 __________________________________________________________________________________________________________________________________ 

                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  

                                                             Page  73                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 7| 7| 8| 7| 7| 7| 8| 6| 3| 5|                                            |            |
                             DAY ON TEST   | 8| 9| 2| 7| 2| 3| 5| 7| 8| 0|                                            |            |
                                           | 6| 5| 4| 4| 9| 6| 7| 4| 1| 0|                                            |            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 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|                                            |     T      |
                               ANIMAL ID   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|                                            |     A      |
    UNTREATD                               | 5| 5| 5| 5| 5| 5| 5| 5| 5| 6|                                            |     L      |
     CONTROL                               | 1| 2| 3| 4| 5| 6| 7| 8| 9| 0|                                            |            |
 __________________________________________________________________________________________________________________________________ 
 SPECIAL SENSES SYSTEM - cont              |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Eye                                     |                                                                          |   4        |
                                            __________________________________________________________________________|____________|
   Zymbal's Gland                          |                            +                                             |   2        |
      Carcinoma                            |                            X                                             |          2 |
 _____________________________________________________________________________________________________________________|            |
 URINARY SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Kidney                                  | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 | X        X  X                                                            |         26 |
      Lipoma                               |                                                                          |          1 |
      Lymphoma Malignant                   |                                                                          |          1 |
      Renal Tubule, Adenoma                |                                                                          |          2 |
      Transitional Epithelium, Carcinoma   |                            X                                             |          1 |
                                            __________________________________________________________________________|____________|
   Urethra                                 |                                                                          |   1        |
                                            __________________________________________________________________________|____________|
   Urinary Bladder                         | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 |                                                                          |          2 |
 __________________________________________________________________________________________________________________________________ 
 SYSTEMIC LESIONS                          |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Multiple Organs                         | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Histiocytic Sarcoma                  |                                                                          |          1 |
      Leukemia Mononuclear                 | X  X     X  X  X     X                                                   |         39 |
      Lymphoma Malignant                   |                                                                          |          1 |
      Mesothelioma Malignant               |                   X                                                      |          1 |
 __________________________________________________________________________________________________________________________________ 

                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  

                                                             Page  74                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 8| 7| 6| 3| 6| 8| 8| 7| 7| 8| 7| 7| 8| 7| 7| 7| 6| 7| 5| 3| 8| 7| 6| 7| 2|             
                             DAY ON TEST   | 5| 4| 9| 7| 6| 5| 5| 2| 2| 5| 0| 6| 5| 4| 0| 3| 8| 3| 6| 9| 5| 4| 8| 0| 8|             
                                           | 7| 4| 7| 3| 8| 7| 7| 9| 2| 7| 8| 1| 7| 5| 8| 0| 4| 0| 4| 4| 7| 4| 4| 2| 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 MALE                   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
                               ANIMAL ID   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
    0.125%                                 | 7| 7| 7| 7| 7| 7| 7| 7| 7| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 9| 9| 9| 9| 9| 9|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 ALIMENTARY SYSTEM                         |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Esophagus                               | +  +  M  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Large, Colon                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leiomyosarcoma                       |                                                                          |             
      Leukemia Mononuclear                 |                                        X                                 |             
                                            __________________________________________________________________________|             
   Intestine Large, Rectum                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Large, Cecum                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                        X                                 |             
                                            __________________________________________________________________________|             
   Intestine Small, Duodenum               | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                        X                                 |             
                                            __________________________________________________________________________|             
   Intestine Small, Jejunum                | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                 X                        |             
                                            __________________________________________________________________________|             
   Intestine Small, Ileum                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leiomyoma                            |                            X                                             |             
      Leukemia Mononuclear                 |                                                 X                        |             
                                            __________________________________________________________________________|             
   Liver                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Hepatocellular Adenoma               |                X        X                                                |             
      Leiomyosarcoma, Metastatic,          |                                                                          |             
          Intestine Large, Colon           |                                                                          |             
      Leukemia Mononuclear                 | X  X  X     X  X  X  X  X  X  X  X  X  X  X  X  X  X     X  X  X  X  X   |             
                                            __________________________________________________________________________|             
   Mesentery                               |                                                                          |             
      Leiomyosarcoma, Metastatic,          |                                                                          |             
          Intestine Large, Colon           |                                                                          |             
                                            __________________________________________________________________________|             
   Oral Mucosa                             |                                        +                                +|             
      Squamous Cell Carcinoma              |                                                                         X|             
      Squamous Cell Papilloma              |                                        X                                 |             
                                            __________________________________________________________________________|             
   Pancreas                                | +  +  +  +  M  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leiomyosarcoma, Metastatic,          |                                                                          |             
          Intestine Large, Colon           |                                                                          |             
      Leukemia Mononuclear                 |                   X                    X        X        X               |             
                                            __________________________________________________________________________|             
   Salivary Glands                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Stomach, Forestomach                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                        X        X        X     X         |             
                                            __________________________________________________________________________|             
   Stomach, Glandular                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                   X                    X        X                        |             
                                            __________________________________________________________________________|             
   Tongue                                  |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 CARDIOVASCULAR SYSTEM                     |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Blood Vessel                            | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Heart                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |             X  X  X     X  X     X              X                        |             
 _____________________________________________________________________________________________________________________|             
 ENDOCRINE SYSTEM                          |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Adrenal Cortex                          | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             

                                                             Page  75                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 8| 7| 6| 3| 6| 8| 8| 7| 7| 8| 7| 7| 8| 7| 7| 7| 6| 7| 5| 3| 8| 7| 6| 7| 2|             
                             DAY ON TEST   | 5| 4| 9| 7| 6| 5| 5| 2| 2| 5| 0| 6| 5| 4| 0| 3| 8| 3| 6| 9| 5| 4| 8| 0| 8|             
                                           | 7| 4| 7| 3| 8| 7| 7| 9| 2| 7| 8| 1| 7| 5| 8| 0| 4| 0| 4| 4| 7| 4| 4| 2| 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 MALE                   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
                               ANIMAL ID   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
    0.125%                                 | 7| 7| 7| 7| 7| 7| 7| 7| 7| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 9| 9| 9| 9| 9| 9|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 ENDOCRINE SYSTEM - cont                   |                                                                          |             
                                           |                                                                          |             
      Leukemia Mononuclear                 |    X  X     X  X  X  X  X     X  X     X     X  X              X     X   |             
                                            __________________________________________________________________________|             
   Adrenal Medulla                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |    X  X     X  X  X  X  X     X  X     X     X  X              X     X   |             
      Pheochromocytoma Malignant           | X                                                                    X   |             
      Pheochromocytoma Benign              | X     X        X  X     X     X              X              X     X      |             
      Pheochromocytoma Benign, Multiple    |                                                                          |             
                                            __________________________________________________________________________|             
   Islets, Pancreatic                      | +  +  +  +  M  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |                                  X                                       |             
                                            __________________________________________________________________________|             
   Parathyroid Gland                       | +  +  +  +  +  +  +  +  +  +  +  +  +  +  M  +  +  M  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Pituitary Gland                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +|             
      Leukemia Mononuclear                 |             X           X              X        X  X                     |             
      Pars Distalis, Adenoma               |                X           X  X  X  X              X        X            |             
      Pars Distalis, Carcinoma             |                                                                          |             
                                            __________________________________________________________________________|             
   Thyroid Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      C-Cell, Adenoma                      |                                                             X            |             
      C-Cell, Carcinoma                    |                                                                          |             
      Follicular Cell, Adenoma             |                X                                                         |             
 _____________________________________________________________________________________________________________________|             
 GENERAL BODY SYSTEM                       |                                                                          |             
                                           |                                                                          |             
    None                                   |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 GENITAL SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Epididymis                              | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Preputial Gland                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |                                                                          |             
      Carcinoma                            |                                                                          |             
      Leukemia Mononuclear                 |                   X     X                       X        X               |             
                                            __________________________________________________________________________|             
   Prostate                                | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              | X                                                                        |             
      Leukemia Mononuclear                 |                                        X        X  X     X               |             
                                            __________________________________________________________________________|             
   Seminal Vesicle                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leiomyosarcoma, Metastatic,          |                                                                          |             
          Intestine Large, Colon           |                                                                          |             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Testes                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Bilateral, Interstitial Cell, Adenoma| X  X  X     X  X  X  X  X  X     X  X  X  X  X  X     X     X  X  X  X   |             
      Interstitial Cell, Adenoma           |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 HEMATOPOIETIC SYSTEM                      |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Bone Marrow                             | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |    X  X     X  X  X  X  X  X  X        X  X  X  X  X     X     X         |             
                                            __________________________________________________________________________|             
   Lymph Node                              |             +  +     +  +     +        +  +     +        +     +     +   |             
      Leukemia Mononuclear                 |                                                                          |             
      Deep Cervical, Leukemia Mononuclear  |                                        X        X                        |             
 _____________________________________________________________________________________________________________________|             

                                                             Page  76                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 8| 7| 6| 3| 6| 8| 8| 7| 7| 8| 7| 7| 8| 7| 7| 7| 6| 7| 5| 3| 8| 7| 6| 7| 2|             
                             DAY ON TEST   | 5| 4| 9| 7| 6| 5| 5| 2| 2| 5| 0| 6| 5| 4| 0| 3| 8| 3| 6| 9| 5| 4| 8| 0| 8|             
                                           | 7| 4| 7| 3| 8| 7| 7| 9| 2| 7| 8| 1| 7| 5| 8| 0| 4| 0| 4| 4| 7| 4| 4| 2| 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 MALE                   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
                               ANIMAL ID   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
    0.125%                                 | 7| 7| 7| 7| 7| 7| 7| 7| 7| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 9| 9| 9| 9| 9| 9|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 HEMATOPOIETIC SYSTEM - cont               |                                                                          |             
                                           |                                                                          |             
      Iliac, Leukemia Mononuclear          |                         X                                                |             
      Inguinal, Leukemia Mononuclear       |                                                                          |             
      Mediastinal, Leukemia Mononuclear    |             X  X        X     X        X  X     X        X           X   |             
      Pancreatic, Leukemia Mononuclear     |                X     X  X     X                 X        X     X         |             
      Popliteal, Leukemia Mononuclear      |                                                                          |             
      Renal, Leukemia Mononuclear          |                         X     X        X        X        X               |             
                                            __________________________________________________________________________|             
   Lymph Node, Mandibular                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X  X  X     X  X  X  X  X  X  X  X  X  X  X     X  X     X     X     X   |             
                                            __________________________________________________________________________|             
   Lymph Node, Mesenteric                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |    X  X     X  X  X  X  X  X  X        X        X  X     X     X     X   |             
                                            __________________________________________________________________________|             
   Spleen                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Fibroma                              |                                                       X                  |             
      Leiomyosarcoma, Metastatic,          |                                                                          |             
          Intestine Large, Colon           |                                                                          |             
      Leukemia Mononuclear                 | X  X  X     X  X  X  X  X  X  X  X  X  X  X  X  X  X     X  X  X  X  X   |             
                                            __________________________________________________________________________|             
   Thymus                                  | +  +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                         X  X           X        X        X     X         |             
 _____________________________________________________________________________________________________________________|             
 INTEGUMENTARY SYSTEM                      |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Mammary Gland                           | +  +  M  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  M|             
      Fibroadenoma                         | X                                   X                                    |             
                                            __________________________________________________________________________|             
   Skin                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Keratoacanthoma                      |                                                    X                     |             
      Squamous Cell Papilloma              |                                     X                                    |             
      Squamous Cell Papilloma, Multiple    | X                                                                        |             
      Trichoepithelioma                    |                                                                          |             
      Sebaceous Gland, Adenoma             |                                                       X                  |             
      Subcutaneous Tissue, Fibroma         | X     X        X     X              X                       X            |             
      Subcutaneous Tissue, Fibrosarcoma    |                                              X                           |             
 _____________________________________________________________________________________________________________________|             
 MUSCULOSKELETAL SYSTEM                    |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Bone                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Skeletal Muscle                         |                                                          +               |             
      Leiomyosarcoma, Metastatic,          |                                                                          |             
          Intestine Large, Colon           |                                                                          |             
      Leukemia Mononuclear                 |                                                          X               |             
 _____________________________________________________________________________________________________________________|             
 NERVOUS SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Brain                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Astrocytoma Malignant                |                                                       X                  |             
      Leukemia Mononuclear                 |             X                                                            |             
                                            __________________________________________________________________________|             
   Peripheral Nerve                        |          +                                               +               |             
                                            __________________________________________________________________________|             
   Spinal Cord                             |          +                                               +               |             
 _____________________________________________________________________________________________________________________|             
 RESPIRATORY SYSTEM                        |                                                                          |             
 _____________________________________________________________________________________________________________________|             

                                                             Page  77                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 8| 7| 6| 3| 6| 8| 8| 7| 7| 8| 7| 7| 8| 7| 7| 7| 6| 7| 5| 3| 8| 7| 6| 7| 2|             
                             DAY ON TEST   | 5| 4| 9| 7| 6| 5| 5| 2| 2| 5| 0| 6| 5| 4| 0| 3| 8| 3| 6| 9| 5| 4| 8| 0| 8|             
                                           | 7| 4| 7| 3| 8| 7| 7| 9| 2| 7| 8| 1| 7| 5| 8| 0| 4| 0| 4| 4| 7| 4| 4| 2| 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 MALE                   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
                               ANIMAL ID   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
    0.125%                                 | 7| 7| 7| 7| 7| 7| 7| 7| 7| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 9| 9| 9| 9| 9| 9|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 RESPIRATORY SYSTEM - cont                 |                                                                          |             
                                           |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Lung                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Alveolar/Bronchiolar Adenoma         |                                           X                              |             
      Leukemia Mononuclear                 |       X     X     X  X     X  X        X  X     X  X     X     X         |             
                                            __________________________________________________________________________|             
   Nose                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                 X        X               |             
      Squamous Cell Carcinoma              |                                                                   X      |             
                                            __________________________________________________________________________|             
   Trachea                                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             
 SPECIAL SENSES SYSTEM                     |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Ear                                     |                                                                          |             
      Squamous Cell Papilloma              |                                                                          |             
                                            __________________________________________________________________________|             
   Eye                                     |                                                                         +|             
                                            __________________________________________________________________________|             
   Zymbal's Gland                          |                                                                          |             
      Carcinoma                            |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 URINARY SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Kidney                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |       X     X  X  X     X  X  X  X     X  X  X  X  X     X     X         |             
                                            __________________________________________________________________________|             
   Urethra                                 |                                                                          |             
                                            __________________________________________________________________________|             
   Urinary Bladder                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                 X                        |             
 _____________________________________________________________________________________________________________________|             
 SYSTEMIC LESIONS                          |                                                                          |             
                                            __________________________________________________________________________|             
   Multiple Organs                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X  X  X     X  X  X  X  X  X  X  X  X  X  X  X  X  X     X  X  X  X  X   |             
 _____________________________________________________________________________________________________________________|             

                                                             Page  78                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 7| 7| 8| 6| 7| 8| 5| 6| 6| 8| 7| 5| 7| 6| 4| 7| 7| 6| 8| 5| 8| 7| 6| 5| 6|             
                             DAY ON TEST   | 8| 8| 3| 7| 6| 1| 3| 8| 9| 5| 3| 4| 2| 1| 6| 6| 2| 9| 5| 6| 3| 6| 6| 5| 5|             
                                           | 6| 6| 0| 7| 6| 4| 5| 2| 7| 7| 0| 7| 5| 9| 7| 8| 2| 7| 2| 2| 1| 5| 6| 4| 6|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   FISCHER 344 RATS MALE                   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
                               ANIMAL ID   | 0| 0| 0| 0| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1|             
    0.125%                                 | 9| 9| 9| 9| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 2|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 ALIMENTARY SYSTEM                         |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Esophagus                               | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Large, Colon                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +  +  +  +  +|             
      Leiomyosarcoma                       |                                                       X                  |             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Intestine Large, Rectum                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Large, Cecum                  | +  +  M  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  M  +  +|             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Intestine Small, Duodenum               | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Intestine Small, Jejunum                | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Intestine Small, Ileum                  | +  +  +  +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +  +  +  +  +  +|             
      Leiomyoma                            |                                                                          |             
      Leukemia Mononuclear                 |                               X                 X                 X      |             
                                            __________________________________________________________________________|             
   Liver                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Hepatocellular Adenoma               |                         X                                      X         |             
      Leiomyosarcoma, Metastatic,          |                                                                          |             
          Intestine Large, Colon           |                                                       X                  |             
      Leukemia Mononuclear                 | X  X  X  X     X  X  X  X     X  X              X  X        X  X  X     X|             
                                            __________________________________________________________________________|             
   Mesentery                               |          +  +  +     +  +           +     +           +           +      |             
      Leiomyosarcoma, Metastatic,          |                                                                          |             
          Intestine Large, Colon           |                                                       X                  |             
                                            __________________________________________________________________________|             
   Oral Mucosa                             |                                                                          |             
      Squamous Cell Carcinoma              |                                                                          |             
      Squamous Cell Papilloma              |                                                                          |             
                                            __________________________________________________________________________|             
   Pancreas                                | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leiomyosarcoma, Metastatic,          |                                                                          |             
          Intestine Large, Colon           |                                                       X                  |             
      Leukemia Mononuclear                 |       X              X        X                 X                 X      |             
                                            __________________________________________________________________________|             
   Salivary Glands                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                               X                 X                 X      |             
                                            __________________________________________________________________________|             
   Stomach, Forestomach                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                 X                 X      |             
                                            __________________________________________________________________________|             
   Stomach, Glandular                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                               X                 X                 X      |             
                                            __________________________________________________________________________|             
   Tongue                                  |                +                                                  +      |             
 _____________________________________________________________________________________________________________________|             
 CARDIOVASCULAR SYSTEM                     |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Blood Vessel                            | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Heart                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                   X  X                          X                 X      |             
 _____________________________________________________________________________________________________________________|             
 ENDOCRINE SYSTEM                          |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Adrenal Cortex                          | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             

                                                             Page  79                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 7| 7| 8| 6| 7| 8| 5| 6| 6| 8| 7| 5| 7| 6| 4| 7| 7| 6| 8| 5| 8| 7| 6| 5| 6|             
                             DAY ON TEST   | 8| 8| 3| 7| 6| 1| 3| 8| 9| 5| 3| 4| 2| 1| 6| 6| 2| 9| 5| 6| 3| 6| 6| 5| 5|             
                                           | 6| 6| 0| 7| 6| 4| 5| 2| 7| 7| 0| 7| 5| 9| 7| 8| 2| 7| 2| 2| 1| 5| 6| 4| 6|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   FISCHER 344 RATS MALE                   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
                               ANIMAL ID   | 0| 0| 0| 0| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1|             
    0.125%                                 | 9| 9| 9| 9| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 2|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 ENDOCRINE SYSTEM - cont                   |                                                                          |             
                                           |                                                                          |             
      Leukemia Mononuclear                 | X  X  X  X     X  X  X  X     X  X              X  X           X  X     X|             
                                            __________________________________________________________________________|             
   Adrenal Medulla                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X  X  X  X     X     X  X        X              X              X  X     X|             
      Pheochromocytoma Malignant           |                X                                                         |             
      Pheochromocytoma Benign              |          X     X                             X                          X|             
      Pheochromocytoma Benign, Multiple    | X                          X                                X            |             
                                            __________________________________________________________________________|             
   Islets, Pancreatic                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |                                                    X                     |             
                                            __________________________________________________________________________|             
   Parathyroid Gland                       | +  +  +  M  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  M  +  +  +  +|             
                                            __________________________________________________________________________|             
   Pituitary Gland                         | +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |    X           X  X           X                 X  X           X  X      |             
      Pars Distalis, Adenoma               |          X                          X        X     X  X  X     X         |             
      Pars Distalis, Carcinoma             |             X                                                            |             
                                            __________________________________________________________________________|             
   Thyroid Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      C-Cell, Adenoma                      |                                                             X            |             
      C-Cell, Carcinoma                    |                                                                          |             
      Follicular Cell, Adenoma             |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 GENERAL BODY SYSTEM                       |                                                                          |             
                                           |                                                                          |             
    None                                   |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 GENITAL SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Epididymis                              | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Preputial Gland                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |             X                                X              X            |             
      Carcinoma                            |                                           X                              |             
      Leukemia Mononuclear                 | X                             X                                   X      |             
                                            __________________________________________________________________________|             
   Prostate                                | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |                                        X                                 |             
      Leukemia Mononuclear                 |                   X           X                 X                 X      |             
                                            __________________________________________________________________________|             
   Seminal Vesicle                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leiomyosarcoma, Metastatic,          |                                                                          |             
          Intestine Large, Colon           |                                                       X                  |             
      Leukemia Mononuclear                 |                               X                 X                        |             
                                            __________________________________________________________________________|             
   Testes                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Bilateral, Interstitial Cell, Adenoma| X  X  X  X  X  X     X  X  X  X              X  X     X     X     X      |             
      Interstitial Cell, Adenoma           |                   X              X  X  X                             X  X|             
 _____________________________________________________________________________________________________________________|             
 HEMATOPOIETIC SYSTEM                      |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Bone Marrow                             | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X  X  X  X     X  X  X  X     X  X              X  X           X  X     X|             
                                            __________________________________________________________________________|             
   Lymph Node                              | +     +  +     +  +  +     +  +  +              +     +     +  +  +  +   |             
      Leukemia Mononuclear                 |                               X                                   X      |             
      Deep Cervical, Leukemia Mononuclear  |                      X        X                 X              X  X      |             
 _____________________________________________________________________________________________________________________|             

                                                             Page  80                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 7| 7| 8| 6| 7| 8| 5| 6| 6| 8| 7| 5| 7| 6| 4| 7| 7| 6| 8| 5| 8| 7| 6| 5| 6|             
                             DAY ON TEST   | 8| 8| 3| 7| 6| 1| 3| 8| 9| 5| 3| 4| 2| 1| 6| 6| 2| 9| 5| 6| 3| 6| 6| 5| 5|             
                                           | 6| 6| 0| 7| 6| 4| 5| 2| 7| 7| 0| 7| 5| 9| 7| 8| 2| 7| 2| 2| 1| 5| 6| 4| 6|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   FISCHER 344 RATS MALE                   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
                               ANIMAL ID   | 0| 0| 0| 0| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1|             
    0.125%                                 | 9| 9| 9| 9| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 2|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 HEMATOPOIETIC SYSTEM - cont               |                                                                          |             
                                           |                                                                          |             
      Iliac, Leukemia Mononuclear          |                               X                 X                 X      |             
      Inguinal, Leukemia Mononuclear       |                               X                                          |             
      Mediastinal, Leukemia Mononuclear    | X     X        X  X  X           X              X           X     X      |             
      Pancreatic, Leukemia Mononuclear     | X     X  X        X           X                 X                 X      |             
      Popliteal, Leukemia Mononuclear      |                                                                          |             
      Renal, Leukemia Mononuclear          |                X              X                             X     X      |             
                                            __________________________________________________________________________|             
   Lymph Node, Mandibular                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X  X  X  X     X  X  X  X     X  X              X  X        X  X  X     X|             
                                            __________________________________________________________________________|             
   Lymph Node, Mesenteric                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X  X  X  X     X  X  X  X     X  X              X  X        X     X     X|             
                                            __________________________________________________________________________|             
   Spleen                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Fibroma                              |                                                                          |             
      Leiomyosarcoma, Metastatic,          |                                                                          |             
          Intestine Large, Colon           |                                                       X                  |             
      Leukemia Mononuclear                 | X  X  X  X     X  X  X  X     X  X              X  X        X  X  X     X|             
                                            __________________________________________________________________________|             
   Thymus                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  M  +  +  +  M|             
      Leukemia Mononuclear                 |       X  X           X        X                 X                 X      |             
 _____________________________________________________________________________________________________________________|             
 INTEGUMENTARY SYSTEM                      |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Mammary Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +  +|             
      Fibroadenoma                         | X                                                     X                  |             
                                            __________________________________________________________________________|             
   Skin                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Keratoacanthoma                      |                X                             X                           |             
      Squamous Cell Papilloma              |                                                                          |             
      Squamous Cell Papilloma, Multiple    |                                                                          |             
      Trichoepithelioma                    |                                                                          |             
      Sebaceous Gland, Adenoma             |                                                                          |             
      Subcutaneous Tissue, Fibroma         |                         X              X                                 |             
      Subcutaneous Tissue, Fibrosarcoma    |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 MUSCULOSKELETAL SYSTEM                    |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Bone                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Skeletal Muscle                         |                                                       +                  |             
      Leiomyosarcoma, Metastatic,          |                                                                          |             
          Intestine Large, Colon           |                                                       X                  |             
      Leukemia Mononuclear                 |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 NERVOUS SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Brain                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Astrocytoma Malignant                |                                                                          |             
      Leukemia Mononuclear                 |                   X                             X                        |             
                                            __________________________________________________________________________|             
   Peripheral Nerve                        |                                                                   +      |             
                                            __________________________________________________________________________|             
   Spinal Cord                             |                                                                   +      |             
 _____________________________________________________________________________________________________________________|             
 RESPIRATORY SYSTEM                        |                                                                          |             
 _____________________________________________________________________________________________________________________|             

                                                             Page  81                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 7| 7| 8| 6| 7| 8| 5| 6| 6| 8| 7| 5| 7| 6| 4| 7| 7| 6| 8| 5| 8| 7| 6| 5| 6|             
                             DAY ON TEST   | 8| 8| 3| 7| 6| 1| 3| 8| 9| 5| 3| 4| 2| 1| 6| 6| 2| 9| 5| 6| 3| 6| 6| 5| 5|             
                                           | 6| 6| 0| 7| 6| 4| 5| 2| 7| 7| 0| 7| 5| 9| 7| 8| 2| 7| 2| 2| 1| 5| 6| 4| 6|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   FISCHER 344 RATS MALE                   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
                               ANIMAL ID   | 0| 0| 0| 0| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1|             
    0.125%                                 | 9| 9| 9| 9| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 2|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 RESPIRATORY SYSTEM - cont                 |                                                                          |             
                                           |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Lung                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Alveolar/Bronchiolar Adenoma         |                                                                X         |             
      Leukemia Mononuclear                 |    X     X     X  X     X     X                 X                 X      |             
                                            __________________________________________________________________________|             
   Nose                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                               X                                          |             
      Squamous Cell Carcinoma              |                                                                          |             
                                            __________________________________________________________________________|             
   Trachea                                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             
 SPECIAL SENSES SYSTEM                     |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Ear                                     |                                              +                           |             
      Squamous Cell Papilloma              |                                              X                           |             
                                            __________________________________________________________________________|             
   Eye                                     |                                                 +                        |             
                                            __________________________________________________________________________|             
   Zymbal's Gland                          |                                                                      +   |             
      Carcinoma                            |                                                                      X   |             
 _____________________________________________________________________________________________________________________|             
 URINARY SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Kidney                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X  X  X  X        X  X  X     X                 X           X  X  X     X|             
                                            __________________________________________________________________________|             
   Urethra                                 |                                        +                                 |             
                                            __________________________________________________________________________|             
   Urinary Bladder                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                               X                 X                 X      |             
 _____________________________________________________________________________________________________________________|             
 SYSTEMIC LESIONS                          |                                                                          |             
                                            __________________________________________________________________________|             
   Multiple Organs                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X  X  X  X     X  X  X  X     X  X              X  X        X  X  X     X|             
 _____________________________________________________________________________________________________________________|             

                                                             Page  82                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 6| 5| 5| 6| 6| 7| 6| 6| 8| 8|                                            |            |
                             DAY ON TEST   | 6| 3| 8| 5| 4| 7| 3| 6| 0| 5|                                            |            |
                                           | 7| 5| 3| 5| 7| 3| 4| 2| 8| 2|                                            |            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 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|                                            |     T      |
                               ANIMAL ID   | 1| 1| 1| 1| 1| 1| 1| 1| 1| 1|                                            |     A      |
    0.125%                                 | 2| 2| 2| 2| 2| 2| 2| 2| 2| 3|                                            |     L      |
                                           | 1| 2| 3| 4| 5| 6| 7| 8| 9| 0|                                            |            |
 __________________________________________________________________________________________________________________________________ 
 ALIMENTARY SYSTEM                         |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Esophagus                               | +  +  +  +  +  +  +  +  +  +                                             |  59        |
                                            __________________________________________________________________________|____________|
   Intestine Large, Colon                  | M  +  +  +  +  +  +  +  +  +                                             |  58        |
      Leiomyosarcoma                       |                                                                          |          1 |
      Leukemia Mononuclear                 |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Intestine Large, Rectum                 | +  +  +  +  +  +  +  +  +  +                                             |  60        |
                                            __________________________________________________________________________|____________|
   Intestine Large, Cecum                  | +  +  +  +  +  +  +  +  +  +                                             |  58        |
      Leukemia Mononuclear                 |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Intestine Small, Duodenum               | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Intestine Small, Jejunum                | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Intestine Small, Ileum                  | +  +  +  +  +  +  +  +  +  +                                             |  59        |
      Leiomyoma                            |                                                                          |          1 |
      Leukemia Mononuclear                 |                                                                          |          4 |
                                            __________________________________________________________________________|____________|
   Liver                                   | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Hepatocellular Adenoma               |                                                                          |          4 |
      Leiomyosarcoma, Metastatic,          |                                                                          |            |
          Intestine Large, Colon           |                                                                          |          1 |
      Leukemia Mononuclear                 | X  X  X  X  X  X  X  X  X                                                |         47 |
                                            __________________________________________________________________________|____________|
   Mesentery                               |          +     +                                                         |  11        |
      Leiomyosarcoma, Metastatic,          |                                                                          |            |
          Intestine Large, Colon           |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Oral Mucosa                             |                                                                          |   2        |
      Squamous Cell Carcinoma              |                                                                          |          1 |
      Squamous Cell Papilloma              |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Pancreas                                | +  +  +  +  +  +  +  +  +  +                                             |  59        |
      Leiomyosarcoma, Metastatic,          |                                                                          |            |
          Intestine Large, Colon           |                                                                          |          1 |
      Leukemia Mononuclear                 | X                                                                        |         10 |
                                            __________________________________________________________________________|____________|
   Salivary Glands                         | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 |                                                                          |          3 |
                                            __________________________________________________________________________|____________|
   Stomach, Forestomach                    | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 |                         X                                                |          7 |
                                            __________________________________________________________________________|____________|
   Stomach, Glandular                      | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 |                         X                                                |          7 |
                                            __________________________________________________________________________|____________|
   Tongue                                  |                                                                          |   2        |
 _____________________________________________________________________________________________________________________|            |
 CARDIOVASCULAR SYSTEM                     |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Blood Vessel                            | +  +  +  +  +  +  +  +  +  +                                             |  60        |
 __________________________________________________________________________________________________________________________________ 

                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  

                                                             Page  83                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 6| 5| 5| 6| 6| 7| 6| 6| 8| 8|                                            |            |
                             DAY ON TEST   | 6| 3| 8| 5| 4| 7| 3| 6| 0| 5|                                            |            |
                                           | 7| 5| 3| 5| 7| 3| 4| 2| 8| 2|                                            |            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 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|                                            |     T      |
                               ANIMAL ID   | 1| 1| 1| 1| 1| 1| 1| 1| 1| 1|                                            |     A      |
    0.125%                                 | 2| 2| 2| 2| 2| 2| 2| 2| 2| 3|                                            |     L      |
                                           | 1| 2| 3| 4| 5| 6| 7| 8| 9| 0|                                            |            |
 __________________________________________________________________________________________________________________________________ 
 CARDIOVASCULAR SYSTEM - cont              |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Heart                                   | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 | X  X                    X                                                |         14 |
 _____________________________________________________________________________________________________________________|            |
 ENDOCRINE SYSTEM                          |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Adrenal Cortex                          | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 | X        X  X        X  X                                                |         34 |
                                            __________________________________________________________________________|____________|
   Adrenal Medulla                         | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 | X        X  X        X  X                                                |         31 |
      Pheochromocytoma Malignant           |                                                                          |          3 |
      Pheochromocytoma Benign              | X        X           X                                                   |         16 |
      Pheochromocytoma Benign, Multiple    |                         X                                                |          4 |
                                            __________________________________________________________________________|____________|
   Islets, Pancreatic                      | +  +  +  +  +  +  +  +  +  +                                             |  59        |
      Adenoma                              |                                                                          |          2 |
                                            __________________________________________________________________________|____________|
   Parathyroid Gland                       | M  +  +  +  +  +  +  +  M  +                                             |  54        |
                                            __________________________________________________________________________|____________|
   Pituitary Gland                         | +  +  +  +  +  +  +  +  +  +                                             |  58        |
      Leukemia Mononuclear                 | X        X           X                                                   |         16 |
      Pars Distalis, Adenoma               | X                    X                                                   |         16 |
      Pars Distalis, Carcinoma             |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Thyroid Gland                           | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      C-Cell, Adenoma                      |                                                                          |          2 |
      C-Cell, Carcinoma                    | X                                                                        |          1 |
      Follicular Cell, Adenoma             |                                                                          |          1 |
 _____________________________________________________________________________________________________________________|            |
 GENERAL BODY SYSTEM                       |                                                                          |            |
                                           |                                                                          |            |
    None                                   |                                                                          |            |
 _____________________________________________________________________________________________________________________|            |
 GENITAL SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Epididymis                              | +  +  +  +  +  +  +  +  +  +                                             |  60        |
                                            __________________________________________________________________________|____________|
   Preputial Gland                         | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Adenoma                              |                                                                          |          3 |
      Carcinoma                            |                X                                                         |          2 |
      Leukemia Mononuclear                 |                         X                                                |          8 |
                                            __________________________________________________________________________|____________|
   Prostate                                | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Adenoma                              |                                                                          |          2 |
      Leukemia Mononuclear                 | X                                                                        |          9 |
                                            __________________________________________________________________________|____________|
   Seminal Vesicle                         | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leiomyosarcoma, Metastatic,          |                                                                          |            |
          Intestine Large, Colon           |                                                                          |          1 |
      Leukemia Mononuclear                 | X                                                                        |          3 |
 __________________________________________________________________________________________________________________________________ 

                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  

                                                             Page  84                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 6| 5| 5| 6| 6| 7| 6| 6| 8| 8|                                            |            |
                             DAY ON TEST   | 6| 3| 8| 5| 4| 7| 3| 6| 0| 5|                                            |            |
                                           | 7| 5| 3| 5| 7| 3| 4| 2| 8| 2|                                            |            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 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|                                            |     T      |
                               ANIMAL ID   | 1| 1| 1| 1| 1| 1| 1| 1| 1| 1|                                            |     A      |
    0.125%                                 | 2| 2| 2| 2| 2| 2| 2| 2| 2| 3|                                            |     L      |
                                           | 1| 2| 3| 4| 5| 6| 7| 8| 9| 0|                                            |            |
 __________________________________________________________________________________________________________________________________ 
 GENITAL SYSTEM - cont                     |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Testes                                  | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Bilateral, Interstitial Cell, Adenoma|             X  X  X     X  X                                             |         40 |
      Interstitial Cell, Adenoma           |    X  X  X                                                               |          9 |
 _____________________________________________________________________________________________________________________|            |
 HEMATOPOIETIC SYSTEM                      |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Bone Marrow                             | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 | X  X  X  X  X  X  X  X  X                                                |         40 |
                                            __________________________________________________________________________|____________|
   Lymph Node                              | +  +  +  +  +  +  +  +  +  +                                             |  36        |
      Leukemia Mononuclear                 |                                                                          |          2 |
      Deep Cervical, Leukemia Mononuclear  | X                                                                        |          8 |
      Iliac, Leukemia Mononuclear          |                         X                                                |          5 |
      Inguinal, Leukemia Mononuclear       |                         X                                                |          2 |
      Mediastinal, Leukemia Mononuclear    | X  X  X  X  X  X  X  X  X                                                |         27 |
      Pancreatic, Leukemia Mononuclear     | X     X        X  X                                                      |         18 |
      Popliteal, Leukemia Mononuclear      | X                                                                        |          1 |
      Renal, Leukemia Mononuclear          | X        X     X        X                                                |         13 |
                                            __________________________________________________________________________|____________|
   Lymph Node, Mandibular                  | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 | X  X     X  X     X  X  X                                                |         42 |
                                            __________________________________________________________________________|____________|
   Lymph Node, Mesenteric                  | +  +  +  +  M  +  +  +  +  +                                             |  58        |
      Leukemia Mononuclear                 | X  X  X  X        X  X  X                                                |         37 |
                                            __________________________________________________________________________|____________|
   Spleen                                  | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Fibroma                              |                                                                          |          1 |
      Leiomyosarcoma, Metastatic,          |                                                                          |            |
          Intestine Large, Colon           |                                                                          |          1 |
      Leukemia Mononuclear                 | X  X  X  X  X  X  X  X  X                                                |         47 |
                                            __________________________________________________________________________|____________|
   Thymus                                  | I  +  +  +  +  I  +  +  +  +                                             |  55        |
      Leukemia Mononuclear                 |             X           X                                                |         14 |
 _____________________________________________________________________________________________________________________|            |
 INTEGUMENTARY SYSTEM                      |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Mammary Gland                           | +  +  +  +  +  +  +  +  +  +                                             |  57        |
      Fibroadenoma                         |                                                                          |          4 |
                                            __________________________________________________________________________|____________|
   Skin                                    | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Keratoacanthoma                      |                   X                                                      |          4 |
      Squamous Cell Papilloma              |                                                                          |          1 |
      Squamous Cell Papilloma, Multiple    |                                                                          |          1 |
      Trichoepithelioma                    |                X                                                         |          1 |
      Sebaceous Gland, Adenoma             |                                                                          |          1 |
      Subcutaneous Tissue, Fibroma         |                                                                          |          8 |
      Subcutaneous Tissue, Fibrosarcoma    |                                                                          |          1 |
 __________________________________________________________________________________________________________________________________ 

                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  

                                                             Page  85                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 6| 5| 5| 6| 6| 7| 6| 6| 8| 8|                                            |            |
                             DAY ON TEST   | 6| 3| 8| 5| 4| 7| 3| 6| 0| 5|                                            |            |
                                           | 7| 5| 3| 5| 7| 3| 4| 2| 8| 2|                                            |            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 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|                                            |     T      |
                               ANIMAL ID   | 1| 1| 1| 1| 1| 1| 1| 1| 1| 1|                                            |     A      |
    0.125%                                 | 2| 2| 2| 2| 2| 2| 2| 2| 2| 3|                                            |     L      |
                                           | 1| 2| 3| 4| 5| 6| 7| 8| 9| 0|                                            |            |
 __________________________________________________________________________________________________________________________________ 
 INTEGUMENTARY SYSTEM - cont               |                                                                          |            |
                                           |                                                                          |            |
 _____________________________________________________________________________________________________________________|            |
 MUSCULOSKELETAL SYSTEM                    |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Bone                                    | +  +  +  +  +  +  +  +  +  +                                             |  60        |
                                            __________________________________________________________________________|____________|
   Skeletal Muscle                         |                                                                          |   2        |
      Leiomyosarcoma, Metastatic,          |                                                                          |            |
          Intestine Large, Colon           |                                                                          |          1 |
      Leukemia Mononuclear                 |                                                                          |          1 |
 _____________________________________________________________________________________________________________________|            |
 NERVOUS SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Brain                                   | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Astrocytoma Malignant                |                                                                          |          1 |
      Leukemia Mononuclear                 |                         X                                                |          4 |
                                            __________________________________________________________________________|____________|
   Peripheral Nerve                        |                                                                          |   3        |
                                            __________________________________________________________________________|____________|
   Spinal Cord                             |                                                                          |   3        |
 _____________________________________________________________________________________________________________________|            |
 RESPIRATORY SYSTEM                        |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Lung                                    | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Alveolar/Bronchiolar Adenoma         |                                                                          |          2 |
      Leukemia Mononuclear                 | X  X  X  X           X  X                                                |         26 |
                                            __________________________________________________________________________|____________|
   Nose                                    | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 |                                                                          |          3 |
      Squamous Cell Carcinoma              |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Trachea                                 | +  +  +  +  +  +  +  +  +  +                                             |  60        |
 _____________________________________________________________________________________________________________________|            |
 SPECIAL SENSES SYSTEM                     |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Ear                                     |                                                                          |   1        |
      Squamous Cell Papilloma              |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Eye                                     |                                                                          |   2        |
                                            __________________________________________________________________________|____________|
   Zymbal's Gland                          |                                                                          |   1        |
      Carcinoma                            |                                                                          |          1 |
 _____________________________________________________________________________________________________________________|            |
 URINARY SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Kidney                                  | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 | X  X  X  X     X  X     X                                                |         35 |
                                            __________________________________________________________________________|____________|
   Urethra                                 |                                                                          |   1        |
                                            __________________________________________________________________________|____________|
   Urinary Bladder                         | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 |                                                                          |          4 |
 __________________________________________________________________________________________________________________________________ 
 SYSTEMIC LESIONS                          |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Multiple Organs                         | +  +  +  +  +  +  +  +  +  +                                             |  60        |
 __________________________________________________________________________________________________________________________________ 

                         * : 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  86                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 6| 5| 5| 6| 6| 7| 6| 6| 8| 8|                                            |            |
                             DAY ON TEST   | 6| 3| 8| 5| 4| 7| 3| 6| 0| 5|                                            |            |
                                           | 7| 5| 3| 5| 7| 3| 4| 2| 8| 2|                                            |            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 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|                                            |     T      |
                               ANIMAL ID   | 1| 1| 1| 1| 1| 1| 1| 1| 1| 1|                                            |     A      |
    0.125%                                 | 2| 2| 2| 2| 2| 2| 2| 2| 2| 3|                                            |     L      |
                                           | 1| 2| 3| 4| 5| 6| 7| 8| 9| 0|                                            |            |
 __________________________________________________________________________________________________________________________________ 
 SYSTEMIC LESIONS - cont                   |                                                                          |            |
                                           |                                                                          |            |
      Leukemia Mononuclear                 | X  X  X  X  X  X  X  X  X                                                |         47 |
 __________________________________________________________________________________________________________________________________ 

                         * : 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  87                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 7| 7| 6| 6| 8| 7| 7| 5| 7| 6| 6| 6| 7| 8| 5| 8| 5| 4| 8| 7| 7| 6| 7| 8| 8|             
                             DAY ON TEST   | 6| 3| 7| 5| 0| 6| 2| 3| 9| 4| 2| 0| 7| 4| 3| 1| 6| 6| 5| 7| 9| 1| 6| 1| 5|             
                                           | 7| 8| 3| 5| 6| 1| 9| 5| 2| 2| 5| 4| 7| 5| 5| 5| 2| 4| 2| 3| 5| 9| 6| 0| 2|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   FISCHER 344 RATS MALE                   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
                               ANIMAL ID   | 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1|             
    0.25%                                  | 4| 4| 4| 4| 4| 4| 4| 4| 4| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 6| 6| 6| 6| 6| 6|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 ALIMENTARY SYSTEM                         |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Esophagus                               | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Large, Colon                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Intestine Large, Rectum                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Carcinoma                            |                                                                          |             
                                            __________________________________________________________________________|             
   Intestine Large, Cecum                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Small, Duodenum               | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                               X                                          |             
                                            __________________________________________________________________________|             
   Intestine Small, Jejunum                | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Carcinoma                            |                                                                          |             
                                            __________________________________________________________________________|             
   Intestine Small, Ileum                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                               X                                          |             
                                            __________________________________________________________________________|             
   Liver                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X  X  X     X     X  X        X     X     X        X     X  X     X  X  X|             
      Osteosarcoma, Metastatic, Mesentery  |                                                                          |             
                                            __________________________________________________________________________|             
   Mesentery                               |                +  +           +                                          |             
      Leukemia Mononuclear                 |                               X                                          |             
      Osteosarcoma                         |                                                                          |             
                                            __________________________________________________________________________|             
   Oral Mucosa                             |                                                                +         |             
      Squamous Cell Carcinoma              |                                                                X         |             
                                            __________________________________________________________________________|             
   Pancreas                                | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |       X                       X                                      X   |             
      Acinus, Adenoma                      |                                                                          |             
                                            __________________________________________________________________________|             
   Salivary Glands                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Carcinoma                            |                                                                          |             
      Fibrosarcoma, Metastatic, Skin       |                                                                          |             
                                            __________________________________________________________________________|             
   Stomach, Forestomach                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |    X        X                 X                                          |             
      Squamous Cell Papilloma              |                                                                          |             
                                            __________________________________________________________________________|             
   Stomach, Glandular                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |    X        X                 X                                          |             
                                            __________________________________________________________________________|             
   Tongue                                  |                                                       +                  |             
                                            __________________________________________________________________________|             
   Tooth                                   |                                                                          |             
      Odontoma                             |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 CARDIOVASCULAR SYSTEM                     |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Blood Vessel                            | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Heart                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                      X        X                    X     X               |             
 _____________________________________________________________________________________________________________________|             
 ENDOCRINE SYSTEM                          |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Adrenal Cortex                          | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X  X  X     X     X  X        X                    X     X        X  X  X|             
                                            __________________________________________________________________________|             
   Adrenal Medulla                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             

                                                             Page  88                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 7| 7| 6| 6| 8| 7| 7| 5| 7| 6| 6| 6| 7| 8| 5| 8| 5| 4| 8| 7| 7| 6| 7| 8| 8|             
                             DAY ON TEST   | 6| 3| 7| 5| 0| 6| 2| 3| 9| 4| 2| 0| 7| 4| 3| 1| 6| 6| 5| 7| 9| 1| 6| 1| 5|             
                                           | 7| 8| 3| 5| 6| 1| 9| 5| 2| 2| 5| 4| 7| 5| 5| 5| 2| 4| 2| 3| 5| 9| 6| 0| 2|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   FISCHER 344 RATS MALE                   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
                               ANIMAL ID   | 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1|             
    0.25%                                  | 4| 4| 4| 4| 4| 4| 4| 4| 4| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 6| 6| 6| 6| 6| 6|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 ENDOCRINE SYSTEM - cont                   |                                                                          |             
                                           |                                                                          |             
      Leukemia Mononuclear                 |    X  X           X  X        X                    X              X  X   |             
      Pheochromocytoma Malignant           |    X                                                                     |             
      Pheochromocytoma Benign              |             X     X                                      X  X        X  X|             
      Pheochromocytoma Benign, Multiple    |                                     X  X                                 |             
                                            __________________________________________________________________________|             
   Islets, Pancreatic                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |                                                                          |             
                                            __________________________________________________________________________|             
   Parathyroid Gland                       | +  +  +  +  M  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Pituitary Gland                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |    X  X                       X                                      X  X|             
      Pars Distalis, Adenoma               | X  X     X     X                       X     X  X                        |             
      Pars Distalis, Carcinoma             |                                                                          |             
                                            __________________________________________________________________________|             
   Thyroid Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                               X                                          |             
      C-Cell, Adenoma                      |                                                          X               |             
      Follicular Cell, Adenoma             |             X                                                            |             
 _____________________________________________________________________________________________________________________|             
 GENERAL BODY SYSTEM                       |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Peritoneum                              |                +                                                         |             
      Mesothelioma Malignant               |                X                                                         |             
 _____________________________________________________________________________________________________________________|             
 GENITAL SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Epididymis                              | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Preputial Gland                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |                            X     X     X                                 |             
      Carcinoma                            |                                  X                                       |             
      Carcinoma, Multiple                  |                                                                          |             
      Leukemia Mononuclear                 |                               X                                          |             
                                            __________________________________________________________________________|             
   Prostate                                | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |                                                                          |             
      Leukemia Mononuclear                 |             X                                            X           X   |             
                                            __________________________________________________________________________|             
   Seminal Vesicle                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |       X                       X                                          |             
                                            __________________________________________________________________________|             
   Testes                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Bilateral, Interstitial Cell, Adenoma| X  X  X     X  X  X     X  X     X  X  X  X     X     X  X  X  X  X  X  X|             
      Interstitial Cell, Adenoma           |          X           X        X              X     X                     |             
 _____________________________________________________________________________________________________________________|             
 HEMATOPOIETIC SYSTEM                      |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Bone Marrow                             | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X  X  X     X     X  X        X     X     X        X     X        X  X  X|             
                                            __________________________________________________________________________|             
   Lymph Node                              | +  +        +     +     +  +  +     +  +  +  +        +           +  +  +|             
      Leukemia Mononuclear                 |                                                                          |             
      Deep Cervical, Leukemia Mononuclear  |                   X                                                      |             
      Iliac, Leukemia Mononuclear          |    X                                                                     |             
      Mediastinal, Leukemia Mononuclear    | X  X              X                       X                       X      |             
 _____________________________________________________________________________________________________________________|             

                                                             Page  89                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 7| 7| 6| 6| 8| 7| 7| 5| 7| 6| 6| 6| 7| 8| 5| 8| 5| 4| 8| 7| 7| 6| 7| 8| 8|             
                             DAY ON TEST   | 6| 3| 7| 5| 0| 6| 2| 3| 9| 4| 2| 0| 7| 4| 3| 1| 6| 6| 5| 7| 9| 1| 6| 1| 5|             
                                           | 7| 8| 3| 5| 6| 1| 9| 5| 2| 2| 5| 4| 7| 5| 5| 5| 2| 4| 2| 3| 5| 9| 6| 0| 2|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   FISCHER 344 RATS MALE                   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
                               ANIMAL ID   | 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1|             
    0.25%                                  | 4| 4| 4| 4| 4| 4| 4| 4| 4| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 6| 6| 6| 6| 6| 6|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 HEMATOPOIETIC SYSTEM - cont               |                                                                          |             
                                           |                                                                          |             
      Mediastinal, Osteosarcoma,           |                                                                          |             
          Metastatic, Mesentery            |                                                                          |             
      Pancreatic, Leukemia Mononuclear     | X                 X           X     X                                X  X|             
      Renal, Leukemia Mononuclear          |             X     X                                                      |             
                                            __________________________________________________________________________|             
   Lymph Node, Mandibular                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Fibrosarcoma, Metastatic, Skin       |                                                                          |             
      Leukemia Mononuclear                 | X  X  X     X     X  X        X     X     X        X     X  X     X  X  X|             
                                            __________________________________________________________________________|             
   Lymph Node, Mesenteric                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  I  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X  X  X     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  X|             
      Osteosarcoma, Metastatic, Mesentery  |                                                                          |             
      Sarcoma                              |                                                                          |             
                                            __________________________________________________________________________|             
   Thymus                                  | +  +  +  +  +  +  +  +  +  M  +  +  +  I  +  +  +  +  +  +  +  +  +  +  M|             
      Leukemia Mononuclear                 |       X     X     X  X        X                                      X   |             
 _____________________________________________________________________________________________________________________|             
 INTEGUMENTARY SYSTEM                      |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Mammary Gland                           | +  +  I  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |                                                                         X|             
      Fibroadenoma                         |                         X                                   X  X         |             
                                            __________________________________________________________________________|             
   Skin                                    | +  +  I  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Keratoacanthoma                      |             X        X                                               X   |             
      Subcutaneous Tissue, Fibroma         | X                          X  X                             X  X         |             
      Subcutaneous Tissue, Fibrosarcoma    |                                                                          |             
      Subcutaneous Tissue, Schwannoma      |                                                                          |             
          Malignant                        |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 MUSCULOSKELETAL SYSTEM                    |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Bone                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Osteosarcoma                         |                                                                          |             
                                            __________________________________________________________________________|             
   Skeletal Muscle                         |                +                                                         |             
      Mesothelioma Malignant, Metastatic,  |                                                                          |             
           Peritoneum                      |                X                                                         |             
      Osteosarcoma, Metastatic, Mesentery  |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 NERVOUS SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Brain                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |       X                       X                    X                     |             
                                            __________________________________________________________________________|             
   Peripheral Nerve                        |                                                                          |             
                                            __________________________________________________________________________|             
   Spinal Cord                             |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 RESPIRATORY SYSTEM                        |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Lung                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Alveolar/Bronchiolar Adenoma         |                                  X                                       |             
 _____________________________________________________________________________________________________________________|             

                                                             Page  90                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 7| 7| 6| 6| 8| 7| 7| 5| 7| 6| 6| 6| 7| 8| 5| 8| 5| 4| 8| 7| 7| 6| 7| 8| 8|             
                             DAY ON TEST   | 6| 3| 7| 5| 0| 6| 2| 3| 9| 4| 2| 0| 7| 4| 3| 1| 6| 6| 5| 7| 9| 1| 6| 1| 5|             
                                           | 7| 8| 3| 5| 6| 1| 9| 5| 2| 2| 5| 4| 7| 5| 5| 5| 2| 4| 2| 3| 5| 9| 6| 0| 2|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   FISCHER 344 RATS MALE                   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
                               ANIMAL ID   | 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1|             
    0.25%                                  | 4| 4| 4| 4| 4| 4| 4| 4| 4| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 6| 6| 6| 6| 6| 6|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 RESPIRATORY SYSTEM - cont                 |                                                                          |             
                                           |                                                                          |             
      Carcinoma, Metastatic, Salivary      |                                                                          |             
          Glands                           |                                                                          |             
      Leukemia Mononuclear                 | X  X  X           X  X        X                    X                     |             
      Squamous Cell Carcinoma, Metastatic, |                                                                          |             
           Oral Mucosa                     |                                                                X         |             
                                            __________________________________________________________________________|             
   Nose                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Pleura                                  |                +                                                         |             
      Mesothelioma Malignant               |                X                                                         |             
                                            __________________________________________________________________________|             
   Trachea                                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             
 SPECIAL SENSES SYSTEM                     |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Ear                                     |                                                                          |             
                                            __________________________________________________________________________|             
   Eye                                     |                                                                          |             
      Carcinoma, Metastatic, Salivary      |                                                                          |             
          Glands                           |                                                                          |             
                                            __________________________________________________________________________|             
   Zymbal's Gland                          |                            +                                +            |             
      Carcinoma                            |                            X                                X            |             
 _____________________________________________________________________________________________________________________|             
 URINARY SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Kidney                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X  X  X     X     X  X        X           X        X     X           X  X|             
      Osteosarcoma, Metastatic, Mesentery  |                                                                          |             
      Renal Tubule, Adenoma                |                                                                          |             
                                            __________________________________________________________________________|             
   Urinary Bladder                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |    X  X     X                 X                                          |             
      Papilloma                            |          X                                                               |             
 _____________________________________________________________________________________________________________________|             
 SYSTEMIC LESIONS                          |                                                                          |             
                                            __________________________________________________________________________|             
   Multiple Organs                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X  X  X     X     X  X        X     X     X        X     X  X     X  X  X|             
      Mesothelioma Malignant               |                X                                                         |             
 _____________________________________________________________________________________________________________________|             

                                                             Page  91                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 5| 7| 7| 8| 5| 5| 5| 6| 5| 6| 6| 7| 4| 5| 6| 8| 5| 5| 7| 7| 7| 6| 7| 5| 6|             
                             DAY ON TEST   | 9| 4| 2| 5| 7| 2| 9| 8| 0| 7| 9| 8| 0| 6| 9| 5| 7| 9| 1| 3| 5| 1| 5| 5| 1|             
                                           | 1| 4| 9| 7| 8| 6| 1| 2| 1| 4| 5| 6| 8| 2| 4| 2| 0| 1| 0| 0| 7| 8| 7| 2| 4|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   FISCHER 344 RATS MALE                   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
                               ANIMAL ID   | 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1|             
    0.25%                                  | 6| 6| 6| 6| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 9|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 ALIMENTARY SYSTEM                         |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Esophagus                               | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Large, Colon                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Intestine Large, Rectum                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Carcinoma                            |       X                                                                  |             
                                            __________________________________________________________________________|             
   Intestine Large, Cecum                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Small, Duodenum               | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Intestine Small, Jejunum                | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Carcinoma                            |             X                                                            |             
                                            __________________________________________________________________________|             
   Intestine Small, Ileum                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Liver                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X  X  X  X     X  X  X  X  X  X           X  X     X  X  X  X  X  X  X   |             
      Osteosarcoma, Metastatic, Mesentery  |                                                                         X|             
                                            __________________________________________________________________________|             
   Mesentery                               |                                                 +        +              +|             
      Leukemia Mononuclear                 |                                                                          |             
      Osteosarcoma                         |                                                                         X|             
                                            __________________________________________________________________________|             
   Oral Mucosa                             |                                                          +               |             
      Squamous Cell Carcinoma              |                                                          X               |             
                                            __________________________________________________________________________|             
   Pancreas                                | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                   X                                               X  X   |             
      Acinus, Adenoma                      |                                              X                           |             
                                            __________________________________________________________________________|             
   Salivary Glands                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Carcinoma                            |                                                                          |             
      Fibrosarcoma, Metastatic, Skin       |                                        X                                 |             
                                            __________________________________________________________________________|             
   Stomach, Forestomach                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                          |             
      Squamous Cell Papilloma              |       X                                                                  |             
                                            __________________________________________________________________________|             
   Stomach, Glandular                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Tongue                                  |                                                                          |             
                                            __________________________________________________________________________|             
   Tooth                                   |                            +                                +            |             
      Odontoma                             |                                                             X            |             
 _____________________________________________________________________________________________________________________|             
 CARDIOVASCULAR SYSTEM                     |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Blood Vessel                            | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Heart                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                X  X      |             
 _____________________________________________________________________________________________________________________|             
 ENDOCRINE SYSTEM                          |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Adrenal Cortex                          | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X  X  X           X                       X  X           X  X  X  X  X   |             
                                            __________________________________________________________________________|             
   Adrenal Medulla                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             

                                                             Page  92                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 5| 7| 7| 8| 5| 5| 5| 6| 5| 6| 6| 7| 4| 5| 6| 8| 5| 5| 7| 7| 7| 6| 7| 5| 6|             
                             DAY ON TEST   | 9| 4| 2| 5| 7| 2| 9| 8| 0| 7| 9| 8| 0| 6| 9| 5| 7| 9| 1| 3| 5| 1| 5| 5| 1|             
                                           | 1| 4| 9| 7| 8| 6| 1| 2| 1| 4| 5| 6| 8| 2| 4| 2| 0| 1| 0| 0| 7| 8| 7| 2| 4|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   FISCHER 344 RATS MALE                   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
                               ANIMAL ID   | 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1|             
    0.25%                                  | 6| 6| 6| 6| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 9|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 ENDOCRINE SYSTEM - cont                   |                                                                          |             
                                           |                                                                          |             
      Leukemia Mononuclear                 |    X                                                     X  X  X  X      |             
      Pheochromocytoma Malignant           |                                                                          |             
      Pheochromocytoma Benign              |                                                          X  X            |             
      Pheochromocytoma Benign, Multiple    |          X                       X                                       |             
                                            __________________________________________________________________________|             
   Islets, Pancreatic                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |    X                                                                     |             
                                            __________________________________________________________________________|             
   Parathyroid Gland                       | M  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Pituitary Gland                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  M  +  +  +|             
      Leukemia Mononuclear                 |                   X                                                      |             
      Pars Distalis, Adenoma               |    X     X           X                          X  X        X           X|             
      Pars Distalis, Carcinoma             |                                                                          |             
                                            __________________________________________________________________________|             
   Thyroid Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |       X                                                                  |             
      C-Cell, Adenoma                      |                                                                          |             
      Follicular Cell, Adenoma             |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 GENERAL BODY SYSTEM                       |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Peritoneum                              |                                                                          |             
      Mesothelioma Malignant               |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 GENITAL SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Epididymis                              | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Preputial Gland                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |          X     X                                                         |             
      Carcinoma                            |                                                                          |             
      Carcinoma, Multiple                  |                               X                                          |             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Prostate                                | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |                                                                   X      |             
      Leukemia Mononuclear                 |       X                                                                  |             
                                            __________________________________________________________________________|             
   Seminal Vesicle                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Testes                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Bilateral, Interstitial Cell, Adenoma|       X  X  X  X  X  X     X  X  X     X     X  X  X  X  X  X  X  X  X  X|             
      Interstitial Cell, Adenoma           | X  X                    X                 X                              |             
 _____________________________________________________________________________________________________________________|             
 HEMATOPOIETIC SYSTEM                      |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Bone Marrow                             | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X  X  X        X  X  X                    X           X  X     X  X  X   |             
                                            __________________________________________________________________________|             
   Lymph Node                              | +  +  +        +  +  +                    +              +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                   X                                                      |             
      Deep Cervical, Leukemia Mononuclear  |                                                                          |             
      Iliac, Leukemia Mononuclear          |                                                                      X   |             
      Mediastinal, Leukemia Mononuclear    | X  X  X        X  X  X                    X              X  X  X  X      |             
 _____________________________________________________________________________________________________________________|             

                                                             Page  93                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 5| 7| 7| 8| 5| 5| 5| 6| 5| 6| 6| 7| 4| 5| 6| 8| 5| 5| 7| 7| 7| 6| 7| 5| 6|             
                             DAY ON TEST   | 9| 4| 2| 5| 7| 2| 9| 8| 0| 7| 9| 8| 0| 6| 9| 5| 7| 9| 1| 3| 5| 1| 5| 5| 1|             
                                           | 1| 4| 9| 7| 8| 6| 1| 2| 1| 4| 5| 6| 8| 2| 4| 2| 0| 1| 0| 0| 7| 8| 7| 2| 4|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   FISCHER 344 RATS MALE                   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
                               ANIMAL ID   | 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1|             
    0.25%                                  | 6| 6| 6| 6| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 9|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 HEMATOPOIETIC SYSTEM - cont               |                                                                          |             
                                           |                                                                          |             
      Mediastinal, Osteosarcoma,           |                                                                          |             
          Metastatic, Mesentery            |                                                                         X|             
      Pancreatic, Leukemia Mononuclear     | X     X           X                                      X     X  X      |             
      Renal, Leukemia Mononuclear          | X                 X                                                  X   |             
                                            __________________________________________________________________________|             
   Lymph Node, Mandibular                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Fibrosarcoma, Metastatic, Skin       |                                        X                                 |             
      Leukemia Mononuclear                 | X     X  X        X  X                    X              X  X  X  X  X   |             
                                            __________________________________________________________________________|             
   Lymph Node, Mesenteric                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      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  X  X  X  X  X   |             
      Osteosarcoma, Metastatic, Mesentery  |                                                                         X|             
      Sarcoma                              |                                                                          |             
                                            __________________________________________________________________________|             
   Thymus                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                   X                                            X         |             
 _____________________________________________________________________________________________________________________|             
 INTEGUMENTARY SYSTEM                      |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Mammary Gland                           | +  +  +  +  +  +  +  +  M  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |                                                                          |             
      Fibroadenoma                         |                                           X                              |             
                                            __________________________________________________________________________|             
   Skin                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Keratoacanthoma                      |                                              X                           |             
      Subcutaneous Tissue, Fibroma         |                               X                                          |             
      Subcutaneous Tissue, Fibrosarcoma    |                                        X                                 |             
      Subcutaneous Tissue, Schwannoma      |                                                                          |             
          Malignant                        |                                                 X                        |             
 _____________________________________________________________________________________________________________________|             
 MUSCULOSKELETAL SYSTEM                    |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Bone                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Osteosarcoma                         |                         X                                                |             
                                            __________________________________________________________________________|             
   Skeletal Muscle                         |                                                                         +|             
      Mesothelioma Malignant, Metastatic,  |                                                                          |             
           Peritoneum                      |                                                                          |             
      Osteosarcoma, Metastatic, Mesentery  |                                                                         X|             
 _____________________________________________________________________________________________________________________|             
 NERVOUS SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Brain                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                          X           X   |             
                                            __________________________________________________________________________|             
   Peripheral Nerve                        |                                  +                                       |             
                                            __________________________________________________________________________|             
   Spinal Cord                             |                                                                      +   |             
 _____________________________________________________________________________________________________________________|             
 RESPIRATORY SYSTEM                        |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Lung                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Alveolar/Bronchiolar Adenoma         |                                                                          |             
 _____________________________________________________________________________________________________________________|             

                                                             Page  94                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 5| 7| 7| 8| 5| 5| 5| 6| 5| 6| 6| 7| 4| 5| 6| 8| 5| 5| 7| 7| 7| 6| 7| 5| 6|             
                             DAY ON TEST   | 9| 4| 2| 5| 7| 2| 9| 8| 0| 7| 9| 8| 0| 6| 9| 5| 7| 9| 1| 3| 5| 1| 5| 5| 1|             
                                           | 1| 4| 9| 7| 8| 6| 1| 2| 1| 4| 5| 6| 8| 2| 4| 2| 0| 1| 0| 0| 7| 8| 7| 2| 4|             
 _____________________________________________________________________________________________________________________|             
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
   FISCHER 344 RATS MALE                   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
                               ANIMAL ID   | 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1|             
    0.25%                                  | 6| 6| 6| 6| 7| 7| 7| 7| 7| 7| 7| 7| 7| 7| 8| 8| 8| 8| 8| 8| 8| 8| 8| 8| 9|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 RESPIRATORY SYSTEM - cont                 |                                                                          |             
                                           |                                                                          |             
      Carcinoma, Metastatic, Salivary      |                                                                          |             
          Glands                           |                                                                          |             
      Leukemia Mononuclear                 | X     X  X        X                                      X     X  X      |             
      Squamous Cell Carcinoma, Metastatic, |                                                                          |             
           Oral Mucosa                     |                                                                          |             
                                            __________________________________________________________________________|             
   Nose                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Pleura                                  |                                                                          |             
      Mesothelioma Malignant               |                                                                          |             
                                            __________________________________________________________________________|             
   Trachea                                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             
 SPECIAL SENSES SYSTEM                     |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Ear                                     |                                                                      +   |             
                                            __________________________________________________________________________|             
   Eye                                     |                                                                          |             
      Carcinoma, Metastatic, Salivary      |                                                                          |             
          Glands                           |                                                                          |             
                                            __________________________________________________________________________|             
   Zymbal's Gland                          |                            +                                             |             
      Carcinoma                            |                            X                                             |             
 _____________________________________________________________________________________________________________________|             
 URINARY SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Kidney                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X     X           X                       X           X  X  X  X  X  X   |             
      Osteosarcoma, Metastatic, Mesentery  |                                                                         X|             
      Renal Tubule, Adenoma                |                                  X                                       |             
                                            __________________________________________________________________________|             
   Urinary Bladder                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                          |             
      Papilloma                            |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 SYSTEMIC LESIONS                          |                                                                          |             
                                            __________________________________________________________________________|             
   Multiple Organs                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X  X  X  X     X  X  X  X  X  X           X  X     X  X  X  X  X  X  X   |             
      Mesothelioma Malignant               |                                                                          |             
 _____________________________________________________________________________________________________________________|             

                                                             Page  95                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 6| 6| 4| 6| 6| 0| 7| 4| 0| 6|                                            |            |
                             DAY ON TEST   | 4| 6| 9| 7| 9| 2| 2| 7| 2| 9|                                            |            |
                                           | 0| 1| 3| 7| 5| 3| 5| 3| 3| 1|                                            |            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 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|                                            |     T      |
                               ANIMAL ID   | 1| 1| 1| 1| 1| 1| 1| 1| 1| 2|                                            |     A      |
    0.25%                                  | 9| 9| 9| 9| 9| 9| 9| 9| 9| 0|                                            |     L      |
                                           | 1| 2| 3| 4| 5| 6| 7| 8| 9| 0|                                            |            |
 __________________________________________________________________________________________________________________________________ 
 ALIMENTARY SYSTEM                         |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Esophagus                               | +  +  +  +  +     +  +     +                                             |  58        |
                                            __________________________________________________________________________|____________|
   Intestine Large, Colon                  | +  +  +  +  +     +  +     +                                             |  58        |
      Leukemia Mononuclear                 |    X                                                                     |          1 |
                                            __________________________________________________________________________|____________|
   Intestine Large, Rectum                 | +  +  +  +  +     +  +     +                                             |  58        |
      Carcinoma                            |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Intestine Large, Cecum                  | +  +  +  +  +     +  +     +                                             |  58        |
                                            __________________________________________________________________________|____________|
   Intestine Small, Duodenum               | +  +  +  +  +     +  +     +                                             |  58        |
      Leukemia Mononuclear                 |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Intestine Small, Jejunum                | +  +  +  A  +     +  +     +                                             |  57        |
      Carcinoma                            |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Intestine Small, Ileum                  | +  +  +  +  +     +  +     +                                             |  58        |
      Leukemia Mononuclear                 |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Liver                                   | +  +  +  +  +     +  +     +                                             |  58        |
      Leukemia Mononuclear                 |    X  X  X        X  X     X                                             |         40 |
      Osteosarcoma, Metastatic, Mesentery  |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Mesentery                               |    +                                                                     |   7        |
      Leukemia Mononuclear                 |                                                                          |          1 |
      Osteosarcoma                         |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Oral Mucosa                             |                                                                          |   2        |
      Squamous Cell Carcinoma              |                                                                          |          2 |
                                            __________________________________________________________________________|____________|
   Pancreas                                | +  +  +  +  +     +  +     +                                             |  58        |
      Leukemia Mononuclear                 |    X  X                                                                  |          8 |
      Acinus, Adenoma                      |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Salivary Glands                         | +  +  +  +  +     +  +     +                                             |  58        |
      Carcinoma                            | X                                                                        |          1 |
      Fibrosarcoma, Metastatic, Skin       |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Stomach, Forestomach                    | +  +  +  +  +     +  +     +                                             |  58        |
      Leukemia Mononuclear                 |    X                                                                     |          4 |
      Squamous Cell Papilloma              |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Stomach, Glandular                      | +  +  +  +  +     +  +     +                                             |  58        |
      Leukemia Mononuclear                 |    X                                                                     |          4 |
                                            __________________________________________________________________________|____________|
   Tongue                                  |                                                                          |   1        |
                                            __________________________________________________________________________|____________|
   Tooth                                   |                                                                          |   2        |
      Odontoma                             |                                                                          |          1 |
 _____________________________________________________________________________________________________________________|            |
 CARDIOVASCULAR SYSTEM                     |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Blood Vessel                            | +  +  +  +  +     +  +     +                                             |  58        |
                                            __________________________________________________________________________|____________|
   Heart                                   | +  +  +  +  +     +  +     +                                             |  58        |
      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  96                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 6| 6| 4| 6| 6| 0| 7| 4| 0| 6|                                            |            |
                             DAY ON TEST   | 4| 6| 9| 7| 9| 2| 2| 7| 2| 9|                                            |            |
                                           | 0| 1| 3| 7| 5| 3| 5| 3| 3| 1|                                            |            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 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|                                            |     T      |
                               ANIMAL ID   | 1| 1| 1| 1| 1| 1| 1| 1| 1| 2|                                            |     A      |
    0.25%                                  | 9| 9| 9| 9| 9| 9| 9| 9| 9| 0|                                            |     L      |
                                           | 1| 2| 3| 4| 5| 6| 7| 8| 9| 0|                                            |            |
 __________________________________________________________________________________________________________________________________ 
 CARDIOVASCULAR SYSTEM - cont              |                                                                          |            |
                                           |                                                                          |            |
 _____________________________________________________________________________________________________________________|            |
 ENDOCRINE SYSTEM                          |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Adrenal Cortex                          | +  +  +  +  +     +  +     +                                             |  58        |
      Leukemia Mononuclear                 |    X  X           X        X                                             |         27 |
                                            __________________________________________________________________________|____________|
   Adrenal Medulla                         | +  +  +  +  +     +  +     +                                             |  58        |
      Leukemia Mononuclear                 |       X                                                                  |         14 |
      Pheochromocytoma Malignant           |                                                                          |          1 |
      Pheochromocytoma Benign              |             X        X     X                                             |         11 |
      Pheochromocytoma Benign, Multiple    |                                                                          |          4 |
                                            __________________________________________________________________________|____________|
   Islets, Pancreatic                      | +  +  +  +  +     +  +     +                                             |  58        |
      Adenoma                              |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Parathyroid Gland                       | +  +  +  +  +     +  +     +                                             |  55        |
                                            __________________________________________________________________________|____________|
   Pituitary Gland                         | +  +  +  +  +     +  +     +                                             |  57        |
      Leukemia Mononuclear                 |    X                                                                     |          7 |
      Pars Distalis, Adenoma               | X           X              X                                             |         17 |
      Pars Distalis, Carcinoma             |                   X                                                      |          1 |
                                            __________________________________________________________________________|____________|
   Thyroid Gland                           | +  +  +  +  +     +  +     +                                             |  58        |
      Leukemia Mononuclear                 |                                                                          |          2 |
      C-Cell, Adenoma                      |                            X                                             |          2 |
      Follicular Cell, Adenoma             |                                                                          |          1 |
 _____________________________________________________________________________________________________________________|            |
 GENERAL BODY SYSTEM                       |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Peritoneum                              |                                                                          |   1        |
      Mesothelioma Malignant               |                                                                          |          1 |
 _____________________________________________________________________________________________________________________|            |
 GENITAL SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Epididymis                              | +  +  +  M  +     +  +     +                                             |  57        |
                                            __________________________________________________________________________|____________|
   Preputial Gland                         | +  +  +  +  +     +  +     +                                             |  58        |
      Adenoma                              |             X                                                            |          6 |
      Carcinoma                            |                                                                          |          1 |
      Carcinoma, Multiple                  |                                                                          |          1 |
      Leukemia Mononuclear                 |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Prostate                                | +  +  +  +  +     +  +     +                                             |  58        |
      Adenoma                              |                                                                          |          1 |
      Leukemia Mononuclear                 |    X                                                                     |          5 |
                                            __________________________________________________________________________|____________|
   Seminal Vesicle                         | +  +  +  +  +     +  +     +                                             |  58        |
      Leukemia Mononuclear                 |    X                                                                     |          3 |
                                            __________________________________________________________________________|____________|
   Testes                                  | +  +  +  M  +     +  +     +                                             |  57        |
      Bilateral, Interstitial Cell, Adenoma| X  X  X           X  X                                                   |         45 |
 __________________________________________________________________________________________________________________________________ 

                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  

                                                             Page  97                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 6| 6| 4| 6| 6| 0| 7| 4| 0| 6|                                            |            |
                             DAY ON TEST   | 4| 6| 9| 7| 9| 2| 2| 7| 2| 9|                                            |            |
                                           | 0| 1| 3| 7| 5| 3| 5| 3| 3| 1|                                            |            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 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|                                            |     T      |
                               ANIMAL ID   | 1| 1| 1| 1| 1| 1| 1| 1| 1| 2|                                            |     A      |
    0.25%                                  | 9| 9| 9| 9| 9| 9| 9| 9| 9| 0|                                            |     L      |
                                           | 1| 2| 3| 4| 5| 6| 7| 8| 9| 0|                                            |            |
 __________________________________________________________________________________________________________________________________ 
 GENITAL SYSTEM - cont                     |                                                                          |            |
                                           |                                                                          |            |
      Interstitial Cell, Adenoma           |             X              X                                             |         11 |
 _____________________________________________________________________________________________________________________|            |
 HEMATOPOIETIC SYSTEM                      |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Bone Marrow                             | +  +  +  +  +     +  +     +                                             |  58        |
      Leukemia Mononuclear                 |    X  X           X  X     X                                             |         31 |
                                            __________________________________________________________________________|____________|
   Lymph Node                              | +  +  +  +           +     +                                             |  34        |
      Leukemia Mononuclear                 |                                                                          |          1 |
      Deep Cervical, Leukemia Mononuclear  |                                                                          |          1 |
      Iliac, Leukemia Mononuclear          |                                                                          |          2 |
      Mediastinal, Leukemia Mononuclear    |    X  X  X           X     X                                             |         21 |
      Mediastinal, Osteosarcoma,           |                                                                          |            |
          Metastatic, Mesentery            |                                                                          |          1 |
      Pancreatic, Leukemia Mononuclear     |       X              X     X                                             |         15 |
      Renal, Leukemia Mononuclear          |    X                                                                     |          6 |
                                            __________________________________________________________________________|____________|
   Lymph Node, Mandibular                  | +  +  +  +  +     +  +     +                                             |  58        |
      Fibrosarcoma, Metastatic, Skin       |                                                                          |          1 |
      Leukemia Mononuclear                 |    X  X           X  X     X                                             |         31 |
                                            __________________________________________________________________________|____________|
   Lymph Node, Mesenteric                  | +  +  +  +  +     +  +     +                                             |  57        |
      Leukemia Mononuclear                 |    X  X  X           X     X                                             |         24 |
                                            __________________________________________________________________________|____________|
   Spleen                                  | +  +  +  +  +     +  +     +                                             |  58        |
      Leukemia Mononuclear                 |    X  X  X        X  X     X                                             |         40 |
      Osteosarcoma, Metastatic, Mesentery  |                                                                          |          1 |
      Sarcoma                              |             X                                                            |          1 |
                                            __________________________________________________________________________|____________|
   Thymus                                  | +  +  +  +  +     +  +     +                                             |  54        |
      Leukemia Mononuclear                 |                                                                          |          8 |
 _____________________________________________________________________________________________________________________|            |
 INTEGUMENTARY SYSTEM                      |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Mammary Gland                           | +  +  +  +  +     +  +     +                                             |  56        |
      Adenoma                              |                                                                          |          1 |
      Fibroadenoma                         |                                                                          |          4 |
                                            __________________________________________________________________________|____________|
   Skin                                    | +  +  +  +  +     +  +     +                                             |  57        |
      Keratoacanthoma                      |                                                                          |          4 |
      Subcutaneous Tissue, Fibroma         |                                                                          |          6 |
      Subcutaneous Tissue, Fibrosarcoma    |                                                                          |          1 |
      Subcutaneous Tissue, Schwannoma      |                                                                          |            |
          Malignant                        |                                                                          |          1 |
 _____________________________________________________________________________________________________________________|            |
 MUSCULOSKELETAL SYSTEM                    |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Bone                                    | +  +  +  +  +     +  +     +                                             |  58        |
 __________________________________________________________________________________________________________________________________ 

                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  

                                                             Page  98                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 6| 6| 4| 6| 6| 0| 7| 4| 0| 6|                                            |            |
                             DAY ON TEST   | 4| 6| 9| 7| 9| 2| 2| 7| 2| 9|                                            |            |
                                           | 0| 1| 3| 7| 5| 3| 5| 3| 3| 1|                                            |            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 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|                                            |     T      |
                               ANIMAL ID   | 1| 1| 1| 1| 1| 1| 1| 1| 1| 2|                                            |     A      |
    0.25%                                  | 9| 9| 9| 9| 9| 9| 9| 9| 9| 0|                                            |     L      |
                                           | 1| 2| 3| 4| 5| 6| 7| 8| 9| 0|                                            |            |
 __________________________________________________________________________________________________________________________________ 
 MUSCULOSKELETAL SYSTEM - cont             |                                                                          |            |
                                           |                                                                          |            |
      Osteosarcoma                         |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Skeletal Muscle                         |                                                                          |   2        |
      Mesothelioma Malignant, Metastatic,  |                                                                          |            |
           Peritoneum                      |                                                                          |          1 |
      Osteosarcoma, Metastatic, Mesentery  |                                                                          |          1 |
 _____________________________________________________________________________________________________________________|            |
 NERVOUS SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Brain                                   | +  +  +  +  +     +  +     +                                             |  58        |
      Leukemia Mononuclear                 |                                                                          |          5 |
                                            __________________________________________________________________________|____________|
   Peripheral Nerve                        |                                                                          |   1        |
                                            __________________________________________________________________________|____________|
   Spinal Cord                             |                                                                          |   1        |
 _____________________________________________________________________________________________________________________|            |
 RESPIRATORY SYSTEM                        |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Lung                                    | +  +  +  +  +     +  +     +                                             |  58        |
      Alveolar/Bronchiolar Adenoma         |                                                                          |          1 |
      Carcinoma, Metastatic, Salivary      |                                                                          |            |
          Glands                           | X                                                                        |          1 |
      Leukemia Mononuclear                 |    X  X              X     X                                             |         18 |
      Squamous Cell Carcinoma, Metastatic, |                                                                          |            |
           Oral Mucosa                     |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Nose                                    | +  +  +  +  +     +  +     +                                             |  58        |
                                            __________________________________________________________________________|____________|
   Pleura                                  |                                                                          |   1        |
      Mesothelioma Malignant               |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Trachea                                 | +  +  +  +  +     +  +     +                                             |  58        |
 _____________________________________________________________________________________________________________________|            |
 SPECIAL SENSES SYSTEM                     |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Ear                                     |                                                                          |   1        |
                                            __________________________________________________________________________|____________|
   Eye                                     | +                                                                        |   1        |
      Carcinoma, Metastatic, Salivary      |                                                                          |            |
          Glands                           | X                                                                        |          1 |
                                            __________________________________________________________________________|____________|
   Zymbal's Gland                          |                                                                          |   3        |
      Carcinoma                            |                                                                          |          3 |
 _____________________________________________________________________________________________________________________|            |
 URINARY SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Kidney                                  | +  +  +  +  +     +  +     +                                             |  58        |
      Leukemia Mononuclear                 |    X  X           X  X     X                                             |         27 |
      Osteosarcoma, Metastatic, Mesentery  |                                                                          |          1 |
      Renal Tubule, Adenoma                |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Urinary Bladder                         | +  +  +  +  +     +  +     +                                             |  58        |
 __________________________________________________________________________________________________________________________________ 

                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  

                                                             Page  99                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 6| 6| 4| 6| 6| 0| 7| 4| 0| 6|                                            |            |
                             DAY ON TEST   | 4| 6| 9| 7| 9| 2| 2| 7| 2| 9|                                            |            |
                                           | 0| 1| 3| 7| 5| 3| 5| 3| 3| 1|                                            |            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 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|                                            |     T      |
                               ANIMAL ID   | 1| 1| 1| 1| 1| 1| 1| 1| 1| 2|                                            |     A      |
    0.25%                                  | 9| 9| 9| 9| 9| 9| 9| 9| 9| 0|                                            |     L      |
                                           | 1| 2| 3| 4| 5| 6| 7| 8| 9| 0|                                            |            |
 __________________________________________________________________________________________________________________________________ 
      Papilloma                            |                                                                          |          1 |
 __________________________________________________________________________________________________________________________________ 
 SYSTEMIC LESIONS                          |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Multiple Organs                         | +  +  +  +  +     +  +     +                                             |  58        |
      Leukemia Mononuclear                 |    X  X  X        X  X     X                                             |         40 |
      Mesothelioma Malignant               |                                                                          |          1 |
 __________________________________________________________________________________________________________________________________ 

                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  

                                                             Page 100                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 7| 8| 8| 8| 8| 8| 5| 8| 8| 7| 7| 8| 8| 6| 6| 8| 7| 7| 6| 5| 7| 7| 8| 7| 6|             
                             DAY ON TEST   | 0| 5| 3| 5| 5| 5| 8| 5| 5| 8| 3| 5| 0| 2| 8| 5| 4| 4| 4| 2| 6| 5| 5| 7| 0|             
                                           | 8| 7| 9| 7| 7| 7| 9| 7| 7| 6| 0| 7| 6| 6| 2| 7| 5| 5| 2| 0| 7| 0| 7| 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                   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
                               ANIMAL ID   | 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2|             
    0.5%                                   | 1| 1| 1| 1| 1| 1| 1| 1| 1| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 3| 3| 3| 3| 3| 3|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 ALIMENTARY SYSTEM                         |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Esophagus                               | +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Large, Colon                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Large, Rectum                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Large, Cecum                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Small, Duodenum               | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Small, Jejunum                | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Intestine Small, Ileum                  | +  M  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Liver                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Hepatocellular Carcinoma             |                                                             X            |             
      Hepatocellular Adenoma               | X                                X                                       |             
      Leukemia Mononuclear                 | X  X  X     X     X           X  X  X  X  X     X  X        X     X  X   |             
      Mesothelioma Malignant, Metastatic,  |                                                                          |             
           Peritoneum                      |                                                                          |             
                                            __________________________________________________________________________|             
   Mesentery                               |       +  +                    +     +  +           +  +           +     +|             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Pancreas                                | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |       X                       X                                          |             
                                            __________________________________________________________________________|             
   Salivary Glands                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                               X                                          |             
                                            __________________________________________________________________________|             
   Stomach, Forestomach                    | +  +  I  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                               X                                          |             
      Squamous Cell Papilloma              |                                                                          |             
                                            __________________________________________________________________________|             
   Stomach, Glandular                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |       X                                                                  |             
                                            __________________________________________________________________________|             
   Tongue                                  |                               +                 +                        |             
      Squamous Cell Papilloma              |                                                                          |             
                                            __________________________________________________________________________|             
   Tooth                                   |                                                                +         |             
 _____________________________________________________________________________________________________________________|             
 CARDIOVASCULAR SYSTEM                     |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Blood Vessel                            | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Heart                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                               X     X     X     X                        |             
 _____________________________________________________________________________________________________________________|             
 ENDOCRINE SYSTEM                          |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Adrenal Cortex                          | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |                                                                          |             
      Leukemia Mononuclear                 |       X                       X  X  X     X        X                 X   |             
                                            __________________________________________________________________________|             
   Adrenal Medulla                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |       X                       X     X                                X   |             
      Pheochromocytoma Malignant           |             X           X                                                |             
      Pheochromocytoma Benign              |                X     X  X                          X                     |             
      Pheochromocytoma Benign, Multiple    |                                                                          |             
 _____________________________________________________________________________________________________________________|             

                                                             Page 101                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 7| 8| 8| 8| 8| 8| 5| 8| 8| 7| 7| 8| 8| 6| 6| 8| 7| 7| 6| 5| 7| 7| 8| 7| 6|             
                             DAY ON TEST   | 0| 5| 3| 5| 5| 5| 8| 5| 5| 8| 3| 5| 0| 2| 8| 5| 4| 4| 4| 2| 6| 5| 5| 7| 0|             
                                           | 8| 7| 9| 7| 7| 7| 9| 7| 7| 6| 0| 7| 6| 6| 2| 7| 5| 5| 2| 0| 7| 0| 7| 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                   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
                               ANIMAL ID   | 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2|             
    0.5%                                   | 1| 1| 1| 1| 1| 1| 1| 1| 1| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 3| 3| 3| 3| 3| 3|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 ENDOCRINE SYSTEM - cont                   |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Islets, Pancreatic                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              | X     X                                      X                           |             
                                            __________________________________________________________________________|             
   Parathyroid Gland                       | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Pituitary Gland                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |       X                       X     X     X     X  X                     |             
      Pars Distalis, Adenoma               |             X                                                            |             
      Pars Distalis, Carcinoma             |                                                                          |             
                                            __________________________________________________________________________|             
   Thyroid Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      C-Cell, Adenoma                      |             X                                                           X|             
      C-Cell, Carcinoma                    |                                                                          |             
      Follicular Cell, Carcinoma           |       X                                                                  |             
 _____________________________________________________________________________________________________________________|             
 GENERAL BODY SYSTEM                       |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Peritoneum                              |                                        +                                 |             
      Mesothelioma Malignant               |                                        X                                 |             
 _____________________________________________________________________________________________________________________|             
 GENITAL SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Epididymis                              | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Preputial Gland                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |          X                                                               |             
      Carcinoma                            |                X                                         X              X|             
      Leukemia Mononuclear                 |       X                       X                                          |             
                                            __________________________________________________________________________|             
   Prostate                                | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |                                                                          |             
      Leukemia Mononuclear                 |                               X                                          |             
                                            __________________________________________________________________________|             
   Seminal Vesicle                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                               X                                          |             
                                            __________________________________________________________________________|             
   Testes                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Bilateral, Interstitial Cell, Adenoma| X  X     X  X  X  X  X  X  X     X  X  X  X     X  X  X  X  X  X  X  X  X|             
      Interstitial Cell, Adenoma           |       X                       X              X                           |             
 _____________________________________________________________________________________________________________________|             
 HEMATOPOIETIC SYSTEM                      |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Bone Marrow                             | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X     X           X           X  X  X  X  X     X  X        X        X   |             
                                            __________________________________________________________________________|             
   Lymph Node                              | +     +     +     +           +  +  +  +        +  +     +  +  +     +   |             
      Leukemia Mononuclear                 |                               X                                          |             
      Deep Cervical, Leukemia Mononuclear  |                               X  X                                       |             
      Iliac, Leukemia Mononuclear          |                               X                                          |             
      Inguinal, Leukemia Mononuclear       |                               X                                          |             
      Mediastinal, Leukemia Mononuclear    | X     X           X           X     X  X                                 |             
      Pancreatic, Leukemia Mononuclear     |                               X  X              X  X        X            |             
      Popliteal, Leukemia Mononuclear      |                               X                                          |             
      Renal, Leukemia Mononuclear          |                               X  X  X              X                 X   |             
                                            __________________________________________________________________________|             
   Lymph Node, Mandibular                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             

                                                             Page 102                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 7| 8| 8| 8| 8| 8| 5| 8| 8| 7| 7| 8| 8| 6| 6| 8| 7| 7| 6| 5| 7| 7| 8| 7| 6|             
                             DAY ON TEST   | 0| 5| 3| 5| 5| 5| 8| 5| 5| 8| 3| 5| 0| 2| 8| 5| 4| 4| 4| 2| 6| 5| 5| 7| 0|             
                                           | 8| 7| 9| 7| 7| 7| 9| 7| 7| 6| 0| 7| 6| 6| 2| 7| 5| 5| 2| 0| 7| 0| 7| 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                   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
                               ANIMAL ID   | 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2|             
    0.5%                                   | 1| 1| 1| 1| 1| 1| 1| 1| 1| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 3| 3| 3| 3| 3| 3|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 HEMATOPOIETIC SYSTEM - cont               |                                                                          |             
                                           |                                                                          |             
      Carcinoma, Metastatic, Zymbal's Gland|                                                                          |             
      Leukemia Mononuclear                 | X  X  X           X           X  X  X  X  X     X  X        X        X   |             
                                            __________________________________________________________________________|             
   Lymph Node, Mesenteric                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Hemangioma                           |                                                                          |             
      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   |             
      Sarcoma                              |                                                                          |             
                                            __________________________________________________________________________|             
   Thymus                                  | +  +  +  +  +  M  +  +  +  +  +  M  +  +  +  M  +  +  +  +  +  +  M  +  +|             
      Leukemia Mononuclear                 |                               X     X                                    |             
      Thymoma Malignant                    |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 INTEGUMENTARY SYSTEM                      |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Mammary Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Fibroadenoma                         | X                    X           X                          X            |             
      Fibroadenoma, Multiple               |                                              X                           |             
                                            __________________________________________________________________________|             
   Skin                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Keratoacanthoma                      |                      X                                                   |             
      Squamous Cell Papilloma              |                X                                                         |             
      Trichoepithelioma                    |                                                                          |             
      Subcutaneous Tissue, Fibroma         |                            X     X                    X              X   |             
      Subcutaneous Tissue, Fibrosarcoma    |                                                 X                        |             
      Subcutaneous Tissue, Schwannoma      |                                                                          |             
          Malignant                        |    X                                                                     |             
 _____________________________________________________________________________________________________________________|             
 MUSCULOSKELETAL SYSTEM                    |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Bone                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             
 NERVOUS SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Brain                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Peripheral Nerve                        |       +                                                                  |             
                                            __________________________________________________________________________|             
   Spinal Cord                             |       +                                                                  |             
 _____________________________________________________________________________________________________________________|             
 RESPIRATORY SYSTEM                        |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Lung                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Alveolar/Bronchiolar Adenoma         |                                                                          |             
      Alveolar/Bronchiolar Carcinoma       |          X                                                               |             
      Leukemia Mononuclear                 |       X                       X  X        X     X  X        X            |             
                                            __________________________________________________________________________|             
   Nose                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                               X                                          |             
                                            __________________________________________________________________________|             
   Trachea                                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             
 SPECIAL SENSES SYSTEM                     |                                                                          |             
                                           |                                                                          |             
 _____________________________________________________________________________________________________________________|             

                                                             Page 103                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 7| 8| 8| 8| 8| 8| 5| 8| 8| 7| 7| 8| 8| 6| 6| 8| 7| 7| 6| 5| 7| 7| 8| 7| 6|             
                             DAY ON TEST   | 0| 5| 3| 5| 5| 5| 8| 5| 5| 8| 3| 5| 0| 2| 8| 5| 4| 4| 4| 2| 6| 5| 5| 7| 0|             
                                           | 8| 7| 9| 7| 7| 7| 9| 7| 7| 6| 0| 7| 6| 6| 2| 7| 5| 5| 2| 0| 7| 0| 7| 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                   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|             
                               ANIMAL ID   | 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2|             
    0.5%                                   | 1| 1| 1| 1| 1| 1| 1| 1| 1| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 3| 3| 3| 3| 3| 3|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 SPECIAL SENSES SYSTEM - cont              |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Eye                                     |                   +           +                                          |             
                                            __________________________________________________________________________|             
   Harderian Gland                         |                         +                                                |             
                                            __________________________________________________________________________|             
   Zymbal's Gland                          |                                                                +         |             
      Adenoma                              |                                                                          |             
      Carcinoma                            |                                                                X         |             
 _____________________________________________________________________________________________________________________|             
 URINARY SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Kidney                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |       X                       X     X  X  X     X  X                 X   |             
      Renal Tubule, Adenoma                |                                     X                                    |             
                                            __________________________________________________________________________|             
   Urinary Bladder                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                               X                                          |             
      Papilloma                            |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 SYSTEMIC LESIONS                          |                                                                          |             
                                            __________________________________________________________________________|             
   Multiple Organs                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X  X  X     X     X           X  X  X  X  X     X  X        X     X  X   |             
      Mesothelioma Malignant               |                                        X                                 |             
 _____________________________________________________________________________________________________________________|             

                                                             Page 104                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 6| 7| 8| 6| 7| 8| 4| 7| 6| 4| 6| 7| 8| 8| 6| 6| 7| 6| 6| 8| 7| 5| 5| 7| 8|             
                             DAY ON TEST   | 3| 8| 0| 4| 0| 5| 2| 3| 4| 8| 2| 0| 5| 5| 4| 6| 6| 2| 2| 5| 3| 0| 5| 1| 0|             
                                           | 2| 6| 7| 7| 2| 7| 3| 0| 7| 7| 6| 2| 7| 7| 7| 8| 6| 6| 7| 7| 0| 8| 1| 9| 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   | 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|             
    0.5%                                   | 3| 3| 3| 3| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 6|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 ALIMENTARY SYSTEM                         |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Esophagus                               | +  +  +  +  +  +  +  +  M  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Large, Colon                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Large, Rectum                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Large, Cecum                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Small, Duodenum               | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Intestine Small, Jejunum                | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Intestine Small, Ileum                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Liver                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Hepatocellular Carcinoma             |       X                                                                  |             
      Hepatocellular Adenoma               |                      X                                                   |             
      Leukemia Mononuclear                 | X     X           X  X        X  X     X                 X     X     X   |             
      Mesothelioma Malignant, Metastatic,  |                                                                          |             
           Peritoneum                      |                                                             X            |             
                                            __________________________________________________________________________|             
   Mesentery                               | +                                         +  +        +     +            |             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Pancreas                                | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Salivary Glands                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Stomach, Forestomach                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                               X                                          |             
      Squamous Cell Papilloma              |                                           X                              |             
                                            __________________________________________________________________________|             
   Stomach, Glandular                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                  X                                       |             
                                            __________________________________________________________________________|             
   Tongue                                  |                                           +                              |             
      Squamous Cell Papilloma              |                                           X                              |             
                                            __________________________________________________________________________|             
   Tooth                                   |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 CARDIOVASCULAR SYSTEM                     |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Blood Vessel                            | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Heart                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                   X           X  X                             X     X   |             
 _____________________________________________________________________________________________________________________|             
 ENDOCRINE SYSTEM                          |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Adrenal Cortex                          | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |    X                                                                     |             
      Leukemia Mononuclear                 | X                 X  X        X                                      X   |             
                                            __________________________________________________________________________|             
   Adrenal Medulla                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                   X  X        X                                          |             
      Pheochromocytoma Malignant           |                                     X                                    |             
      Pheochromocytoma Benign              |       X                             X        X                           |             
      Pheochromocytoma Benign, Multiple    |                X                                                         |             
 _____________________________________________________________________________________________________________________|             

                                                             Page 105                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 6| 7| 8| 6| 7| 8| 4| 7| 6| 4| 6| 7| 8| 8| 6| 6| 7| 6| 6| 8| 7| 5| 5| 7| 8|             
                             DAY ON TEST   | 3| 8| 0| 4| 0| 5| 2| 3| 4| 8| 2| 0| 5| 5| 4| 6| 6| 2| 2| 5| 3| 0| 5| 1| 0|             
                                           | 2| 6| 7| 7| 2| 7| 3| 0| 7| 7| 6| 2| 7| 7| 7| 8| 6| 6| 7| 7| 0| 8| 1| 9| 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   | 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|             
    0.5%                                   | 3| 3| 3| 3| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 6|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 ENDOCRINE SYSTEM - cont                   |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Islets, Pancreatic                      | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |                                                                          |             
                                            __________________________________________________________________________|             
   Parathyroid Gland                       | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  M  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Pituitary Gland                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |       X                          X                             X         |             
      Pars Distalis, Adenoma               |                X                             X           X  X           X|             
      Pars Distalis, Carcinoma             |                                                       X                  |             
                                            __________________________________________________________________________|             
   Thyroid Gland                           | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      C-Cell, Adenoma                      |                X                                                         |             
      C-Cell, Carcinoma                    |                                  X  X                                    |             
      Follicular Cell, Carcinoma           |                                                          X               |             
 _____________________________________________________________________________________________________________________|             
 GENERAL BODY SYSTEM                       |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Peritoneum                              |                         +                                   +            |             
      Mesothelioma Malignant               |                         X                                   X            |             
 _____________________________________________________________________________________________________________________|             
 GENITAL SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Epididymis                              | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
                                            __________________________________________________________________________|             
   Preputial Gland                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |    X                                                     X               |             
      Carcinoma                            |                                                                      X  X|             
      Leukemia Mononuclear                 |                               X                                          |             
                                            __________________________________________________________________________|             
   Prostate                                | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Adenoma                              |                                        X                                 |             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Seminal Vesicle                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Testes                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Bilateral, Interstitial Cell, Adenoma| X  X  X  X  X  X     X  X        X  X  X  X  X  X           X  X  X  X   |             
      Interstitial Cell, Adenoma           |                            X  X                    X  X  X              X|             
 _____________________________________________________________________________________________________________________|             
 HEMATOPOIETIC SYSTEM                      |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Bone Marrow                             | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X     X              X        X  X                             X     X   |             
                                            __________________________________________________________________________|             
   Lymph Node                              | +     +  +        +  +  +     +  +     +  +              +  +     +  +   |             
      Leukemia Mononuclear                 |                               X                                          |             
      Deep Cervical, Leukemia Mononuclear  |                               X                                          |             
      Iliac, Leukemia Mononuclear          |                               X                                          |             
      Inguinal, Leukemia Mononuclear       |                               X                                          |             
      Mediastinal, Leukemia Mononuclear    |       X           X           X  X                       X           X   |             
      Pancreatic, Leukemia Mononuclear     |                      X        X                                          |             
      Popliteal, Leukemia Mononuclear      |                                                                          |             
      Renal, Leukemia Mononuclear          |                                  X                                       |             
                                            __________________________________________________________________________|             
   Lymph Node, Mandibular                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             

                                                             Page 106                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 6| 7| 8| 6| 7| 8| 4| 7| 6| 4| 6| 7| 8| 8| 6| 6| 7| 6| 6| 8| 7| 5| 5| 7| 8|             
                             DAY ON TEST   | 3| 8| 0| 4| 0| 5| 2| 3| 4| 8| 2| 0| 5| 5| 4| 6| 6| 2| 2| 5| 3| 0| 5| 1| 0|             
                                           | 2| 6| 7| 7| 2| 7| 3| 0| 7| 7| 6| 2| 7| 7| 7| 8| 6| 6| 7| 7| 0| 8| 1| 9| 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   | 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|             
    0.5%                                   | 3| 3| 3| 3| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 6|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 HEMATOPOIETIC SYSTEM - cont               |                                                                          |             
                                           |                                                                          |             
      Carcinoma, Metastatic, Zymbal's Gland|                            X                                             |             
      Leukemia Mononuclear                 | X     X              X        X  X                       X     X     X   |             
                                            __________________________________________________________________________|             
   Lymph Node, Mesenteric                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Hemangioma                           |                                                          X               |             
      Leukemia Mononuclear                 | X                 X           X  X                       X     X         |             
                                            __________________________________________________________________________|             
   Spleen                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X     X           X  X        X  X     X                 X     X     X   |             
      Sarcoma                              |                                                    X                     |             
                                            __________________________________________________________________________|             
   Thymus                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |       X                          X                                       |             
      Thymoma Malignant                    |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 INTEGUMENTARY SYSTEM                      |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Mammary Gland                           | +  M  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  M  +  +  +|             
      Fibroadenoma                         |                X                                                         |             
      Fibroadenoma, Multiple               |                                                                          |             
                                            __________________________________________________________________________|             
   Skin                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Keratoacanthoma                      |          X                                      X                    X   |             
      Squamous Cell Papilloma              |             X                                                            |             
      Trichoepithelioma                    |                                                    X                     |             
      Subcutaneous Tissue, Fibroma         |                                                 X        X               |             
      Subcutaneous Tissue, Fibrosarcoma    |                                                                          |             
      Subcutaneous Tissue, Schwannoma      |                                                                          |             
          Malignant                        |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 MUSCULOSKELETAL SYSTEM                    |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Bone                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             
 NERVOUS SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Brain                                   | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Peripheral Nerve                        |                                                                          |             
                                            __________________________________________________________________________|             
   Spinal Cord                             |                                                                          |             
 _____________________________________________________________________________________________________________________|             
 RESPIRATORY SYSTEM                        |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Lung                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Alveolar/Bronchiolar Adenoma         |                                                                          |             
      Alveolar/Bronchiolar Carcinoma       |                                                                          |             
      Leukemia Mononuclear                 |                   X           X  X                             X     X   |             
                                            __________________________________________________________________________|             
   Nose                                    | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                          |             
                                            __________________________________________________________________________|             
   Trachea                                 | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
 _____________________________________________________________________________________________________________________|             
 SPECIAL SENSES SYSTEM                     |                                                                          |             
                                           |                                                                          |             
 _____________________________________________________________________________________________________________________|             

                                                             Page 107                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 _____________________________________________________________________________________________________________________              
                                           | 6| 7| 8| 6| 7| 8| 4| 7| 6| 4| 6| 7| 8| 8| 6| 6| 7| 6| 6| 8| 7| 5| 5| 7| 8|             
                             DAY ON TEST   | 3| 8| 0| 4| 0| 5| 2| 3| 4| 8| 2| 0| 5| 5| 4| 6| 6| 2| 2| 5| 3| 0| 5| 1| 0|             
                                           | 2| 6| 7| 7| 2| 7| 3| 0| 7| 7| 6| 2| 7| 7| 7| 8| 6| 6| 7| 7| 0| 8| 1| 9| 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   | 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|             
    0.5%                                   | 3| 3| 3| 3| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 5| 5| 5| 5| 5| 5| 5| 5| 5| 5| 6|             
                                           | 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|             
 _____________________________________________________________________________________________________________________|             
 SPECIAL SENSES SYSTEM - cont              |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Eye                                     |                                                                          |             
                                            __________________________________________________________________________|             
   Harderian Gland                         |                                                                          |             
                                            __________________________________________________________________________|             
   Zymbal's Gland                          |             +              +                 +                           |             
      Adenoma                              |             X                                                            |             
      Carcinoma                            |                            X                 X                           |             
 _____________________________________________________________________________________________________________________|             
 URINARY SYSTEM                            |                                                                          |             
                                           |                                                                          |             
                                            __________________________________________________________________________|             
   Kidney                                  | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |       X           X  X        X  X                             X     X   |             
      Renal Tubule, Adenoma                |                                                                          |             
                                            __________________________________________________________________________|             
   Urinary Bladder                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 |                                                                          |             
      Papilloma                            |                X                                                         |             
 _____________________________________________________________________________________________________________________|             
 SYSTEMIC LESIONS                          |                                                                          |             
                                            __________________________________________________________________________|             
   Multiple Organs                         | +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +  +|             
      Leukemia Mononuclear                 | X     X           X  X        X  X     X                 X     X     X   |             
      Mesothelioma Malignant               |                         X                                   X            |             
 _____________________________________________________________________________________________________________________|             

                                                             Page 108                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 8| 7| 6| 4| 6| 8| 6| 6| 7| 5|                                            |            |
                             DAY ON TEST   | 1| 3| 2| 8| 7| 5| 9| 5| 7| 3|                                            |            |
                                           | 0| 9| 1| 7| 5| 7| 1| 5| 3| 7|                                            |            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 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|                                            |     T      |
                               ANIMAL ID   | 2| 2| 2| 2| 2| 2| 2| 2| 2| 2|                                            |     A      |
    0.5%                                   | 6| 6| 6| 6| 6| 6| 6| 6| 6| 7|                                            |     L      |
                                           | 1| 2| 3| 4| 5| 6| 7| 8| 9| 0|                                            |            |
 __________________________________________________________________________________________________________________________________ 
 ALIMENTARY SYSTEM                         |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Esophagus                               | +  +  +  +  +  +  +  +  +  +                                             |  58        |
                                            __________________________________________________________________________|____________|
   Intestine Large, Colon                  | +  +  +  +  +  +  +  +  +  +                                             |  60        |
                                            __________________________________________________________________________|____________|
   Intestine Large, Rectum                 | +  +  +  +  M  +  +  +  +  +                                             |  59        |
                                            __________________________________________________________________________|____________|
   Intestine Large, Cecum                  | +  +  +  +  +  +  +  +  +  +                                             |  60        |
                                            __________________________________________________________________________|____________|
   Intestine Small, Duodenum               | +  +  +  +  +  +  +  +  +  +                                             |  60        |
                                            __________________________________________________________________________|____________|
   Intestine Small, Jejunum                | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 |    X                                                                     |          1 |
                                            __________________________________________________________________________|____________|
   Intestine Small, Ileum                  | +  +  +  +  +  +  +  +  +  +                                             |  59        |
      Leukemia Mononuclear                 |    X                                                                     |          1 |
                                            __________________________________________________________________________|____________|
   Liver                                   | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Hepatocellular Carcinoma             |                                                                          |          2 |
      Hepatocellular Adenoma               |                                                                          |          3 |
      Leukemia Mononuclear                 |    X  X  X  X     X  X  X                                                |         32 |
      Mesothelioma Malignant, Metastatic,  |                                                                          |            |
           Peritoneum                      |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Mesentery                               |    +                    +                                                |  16        |
      Leukemia Mononuclear                 |    X                                                                     |          1 |
                                            __________________________________________________________________________|____________|
   Pancreas                                | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 |    X  X                                                                  |          4 |
                                            __________________________________________________________________________|____________|
   Salivary Glands                         | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Stomach, Forestomach                    | +  +  +  +  +  +  +  +  +  +                                             |  59        |
      Leukemia Mononuclear                 |    X  X                                                                  |          4 |
      Squamous Cell Papilloma              |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Stomach, Glandular                      | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 |    X                                                                     |          3 |
                                            __________________________________________________________________________|____________|
   Tongue                                  |                +                                                         |   4        |
      Squamous Cell Papilloma              |                X                                                         |          2 |
                                            __________________________________________________________________________|____________|
   Tooth                                   |                                                                          |   1        |
 _____________________________________________________________________________________________________________________|            |
 CARDIOVASCULAR SYSTEM                     |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Blood Vessel                            | +  +  +  +  +  +  +  +  +  +                                             |  60        |
                                            __________________________________________________________________________|____________|
   Heart                                   | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 |       X           X                                                      |         11 |
 _____________________________________________________________________________________________________________________|            |
 ENDOCRINE SYSTEM                          |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Adrenal Cortex                          | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Adenoma                              |                                                                          |          1 |
      Leukemia Mononuclear                 |    X  X              X  X                                                |         16 |
 __________________________________________________________________________________________________________________________________ 

                         * : 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 109                                                               
NTP Experiment-Test: 05217-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                                        T-BUTYLHYDROQUINONE                                    Date: 03/17/97    
Route: DOSED FEED                                                                                                 Time: 18:00:35    
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 8| 7| 6| 4| 6| 8| 6| 6| 7| 5|                                            |            |
                             DAY ON TEST   | 1| 3| 2| 8| 7| 5| 9| 5| 7| 3|                                            |            |
                                           | 0| 9| 1| 7| 5| 7| 1| 5| 3| 7|                                            |            |
 _____________________________________________________________________________________________________________________|     T (*)  |
                                           | 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|                                            |     T      |
                               ANIMAL ID   | 2| 2| 2| 2| 2| 2| 2| 2| 2| 2|                                            |     A      |
    0.5%                                   | 6| 6| 6| 6| 6| 6| 6| 6| 6| 7|                                            |     L      |
                                           | 1| 2| 3| 4| 5| 6| 7| 8| 9| 0|                                            |            |
 __________________________________________________________________________________________________________________________________ 
 ENDOCRINE SYSTEM - cont                   |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Adrenal Medulla                         | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 |    X  X           X  X  X                                                |         12 |
      Pheochromocytoma Malignant           |                                                                          |          3 |
      Pheochromocytoma Benign              | X     X  X        X                                                      |         11 |
      Pheochromocytoma Benign, Multiple    |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Islets, Pancreatic                      | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Adenoma                              |                                                                          |          3 |
                                            __________________________________________________________________________|____________|
   Parathyroid Gland                       | +  +  +  +  +  +  +  M  +  +                                             |  58        |
                                            __________________________________________________________________________|____________|
   Pituitary Gland                         | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Leukemia Mononuclear                 |       X              X                                                   |         11 |
      Pars Distalis, Adenoma               |                                                                          |          6 |
      Pars Distalis, Carcinoma             |                                                                          |          1 |
                                            __________________________________________________________________________|____________|
   Thyroid Gland                           | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      C-Cell, Adenoma                      |       X                                                                  |          4 |
      C-Cell, Carcinoma                    |                                                                          |          2 |
      Follicular Cell, Carcinoma           | X                                                                        |          3 |
 _____________________________________________________________________________________________________________________|            |
 GENERAL BODY SYSTEM                       |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Peritoneum                              |                                                                          |   3        |
      Mesothelioma Malignant               |                                                                          |          3 |
 _____________________________________________________________________________________________________________________|            |
 GENITAL SYSTEM                            |                                                                          |            |
                                           |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Epididymis                              | +  +  +  +  +  +  +  +  +  +                                             |  60        |
                                            __________________________________________________________________________|____________|
   Preputial Gland                         | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Adenoma                              |                                                                          |          3 |
      Carcinoma                            |                                                                          |          5 |
      Leukemia Mononuclear                 |    X  X     X                                                            |          6 |
                                            __________________________________________________________________________|____________|
   Prostate                                | +  +  +  +  +  +  +  +  +  +                                             |  60        |
      Adenoma                              |                                                                          |          1 |
      Leukemia Mononuclear                 |    X        X                                                            |          3 |