https://ntp.niehs.nih.gov/go/2296

TDMS Study 05063-01 Pathology Tables

                              INCIDENCE RATES OF NEOPLASMS BY ANATOMIC SITE (SYSTEMIC LESIONS ABRIDGED) (a)
                                                           PHENYLBUTAZONE
NTP Experiment-Test: 05063-01                                                                                     Report: PEIRPT05
Study Type: CHRONIC                                                                                               Date: 09/08/94
Route: GAVAGE                                                                                                     Time: 19:21:04
       Facility:  TSI Mason Research
       Chemical CAS #:  50-33-9
       Lock Date:  None
       Cage Range:  All
       Reasons For Removal:    All
       Removal Date Range:     All
       Treatment Groups:       Include All
a  Number of animals examined microscopically at site and number of animals with lesion
                                                             Page   1
NTP Experiment-Test: 05063-01  INCIDENCE RATES OF NEOPLASMS BY ANATOMIC SITE (SYSTEMIC LESIONS ABRIDGED) (a)      Report: PEIRPT05
Study Type: CHRONIC                                           PHENYLBUTAZONE                                      Date: 09/08/94  
Route: GAVAGE                                                                                                     Time: 19:21:04  
____________________________________________________________________________________________________________________________________
         FISCHER 344 RATS FEMALE                   VEHICLE      0.05G/KG     0.1 G/KG                                               
____________________________________________________________________________________________________________________________________
DISPOSITION SUMMARY                                                                                                                 
  Animals Initially in Study                          50           50           50                                                  
  Early Deaths                                                                                                                      
    Moribund Sacrifice                                14            9           14                                                  
    Natural Death                                      5            5           14                                                  
    Accident                                                        1                                                               
  Survivors                                                                                                                         
    Terminal Sacrifice                                30           35           21                                                  
    Natural Death                                                                1                                                  
    Terminal Sacrifice                                 1                                                                            
  Animals Examined Microscopically                    50           50           50                                                  
____________________________________________________________________________________________________________________________________
 ALIMENTARY SYSTEM                                                                                                                  
   Intestine Small, Duodenum                          (50)         (9)          (50)                                                
      Adenocarcinoma                                                             1 (2%)                                             
      Leiomyosarcoma                                                1 (11%)                                                         
   Liver                                              (50)         (27)         (50)                                                
      Neoplastic Nodule                                1 (2%)       2 (7%)                                                          
   Mesentery                                          (2)          (5)          (10)                                                
      Sarcoma                                                       1 (20%)                                                         
   Pancreas                                           (50)         (9)          (50)                                                
      Adenoma                                          1 (2%)                                                                       
   Salivary Glands                                    (50)         (7)          (50)                                                
   Stomach, Forestomach                               (49)         (49)         (49)                                                
      Squamous Cell Papilloma                          1 (2%)                                                                       
   Stomach, Glandular                                 (50)         (49)         (50)                                                
____________________________________________________________________________________________________________________________________
 CARDIOVASCULAR SYSTEM                                                                                                              
   Heart                                              (50)         (7)          (50)                                                
____________________________________________________________________________________________________________________________________
 ENDOCRINE SYSTEM                                                                                                                   
   Adrenal Gland, Cortex                              (50)         (50)         (50)                                                
      Adenoma                                          1 (2%)       1 (2%)                                                          
      Carcinoma                                                     1 (2%)                                                          
   Adrenal Gland, Medulla                             (50)         (50)         (50)                                                
      Pheochromocytoma NOS                                                       1 (2%)                                             
      Pheochromocytoma Benign                          3 (6%)       1 (2%)       2 (4%)                                             
   Pituitary Gland                                    (48)         (49)         (50)                                                
      Pars Distalis, Adenoma                          30 (63%)     24 (49%)     21 (42%)                                            
                                                             Page   2                                                               
NTP Experiment-Test: 05063-01  INCIDENCE RATES OF NEOPLASMS BY ANATOMIC SITE (SYSTEMIC LESIONS ABRIDGED) (a)      Report: PEIRPT05
Study Type: CHRONIC                                           PHENYLBUTAZONE                                      Date: 09/08/94  
Route: GAVAGE                                                                                                     Time: 19:21:04  
____________________________________________________________________________________________________________________________________
         FISCHER 344 RATS FEMALE                   VEHICLE      0.05G/KG     0.1 G/KG                                               
____________________________________________________________________________________________________________________________________
ENDOCRINE SYSTEM - cont                                                                                                             
      Pars Distalis, Adenoma, Multiple                                           1 (2%)                                             
   Thyroid Gland                                      (50)         (49)         (50)                                                
      C-Cell, Adenoma                                  2 (4%)       4 (8%)                                                          
      C-Cell, Carcinoma                                1 (2%)       1 (2%)                                                          
____________________________________________________________________________________________________________________________________
 GENERAL BODY SYSTEM                                                                                                                
   None                                                                                                                             
____________________________________________________________________________________________________________________________________
 GENITAL SYSTEM                                                                                                                     
   Clitoral Gland                                     (36)         (11)         (41)                                                
      Adenoma                                          5 (14%)      4 (36%)                                                         
      Carcinoma                                                     2 (18%)      2 (5%)                                             
      Squamous Cell Carcinoma                                       1 (9%)                                                          
   Ovary                                              (50)         (14)         (50)                                                
      Granulosa Cell Tumor Malignant                                1 (7%)                                                          
      Granulosa Cell Tumor Benign                                                1 (2%)                                             
   Uterus                                             (50)         (17)         (50)                                                
      Basosquamous Tumor Malignant                                  1 (6%)                                                          
      Leiomyosarcoma                                   1 (2%)                                                                       
      Polyp Stromal                                   15 (30%)      7 (41%)     12 (24%)                                            
      Polyp Stromal, Multiple                          1 (2%)                                                                       
      Sarcoma Stromal                                  2 (4%)       3 (18%)                                                         
____________________________________________________________________________________________________________________________________
 HEMATOPOIETIC SYSTEM                                                                                                               
   Bone Marrow                                        (49)         (6)          (48)                                                
   Lymph Node                                         (50)         (15)         (49)                                                
   Lymph Node, Mandibular                             (42)         (5)          (37)                                                
      Squamous Cell Carcinoma, Metastatic,                                                                                          
          Zymbal's Gland                               1 (2%)                                                                       
   Lymph Node, Mesenteric                             (50)         (13)         (46)                                                
   Spleen                                             (50)         (50)         (50)                                                
   Thymus                                             (42)         (8)          (38)                                                
____________________________________________________________________________________________________________________________________
 INTEGUMENTARY SYSTEM                                                                                                               
   Mammary Gland                                      (46)         (18)         (40)                                                
      Adenocarcinoma                                   1 (2%)       1 (6%)                                                          
      Fibroadenoma                                    18 (39%)      8 (44%)      7 (18%)                                            
      Fibroadenoma, Multiple                           4 (9%)       7 (39%)                                                         
   Skin                                               (50)         (12)         (49)                                                
                                                             Page   3                                                               
NTP Experiment-Test: 05063-01  INCIDENCE RATES OF NEOPLASMS BY ANATOMIC SITE (SYSTEMIC LESIONS ABRIDGED) (a)      Report: PEIRPT05
Study Type: CHRONIC                                           PHENYLBUTAZONE                                      Date: 09/08/94  
Route: GAVAGE                                                                                                     Time: 19:21:04  
____________________________________________________________________________________________________________________________________
         FISCHER 344 RATS FEMALE                   VEHICLE      0.05G/KG     0.1 G/KG                                               
____________________________________________________________________________________________________________________________________
INTEGUMENTARY SYSTEM - cont                                                                                                         
      Carcinosarcoma                                                1 (8%)                                                          
      Squamous Cell Papilloma                                       1 (8%)                                                          
      Subcutaneous Tissue, Fibroma                     1 (2%)       1 (8%)       1 (2%)                                             
      Subcutaneous Tissue, Sarcoma                     1 (2%)                                                                       
____________________________________________________________________________________________________________________________________
 MUSCULOSKELETAL SYSTEM                                                                                                             
   Skeletal Muscle                                    (2)          (1)                                                              
      Sarcoma                                                       1 (100%)                                                        
____________________________________________________________________________________________________________________________________
 NERVOUS SYSTEM                                                                                                                     
   Brain                                              (50)         (10)         (50)                                                
      Glioma Benign                                                 1 (10%)                                                         
____________________________________________________________________________________________________________________________________
 RESPIRATORY SYSTEM                                                                                                                 
   Lung                                               (50)         (20)         (50)                                                
      Alveolar/Bronchiolar Adenoma                     1 (2%)                    2 (4%)                                             
      Alveolar/Bronchiolar Carcinoma                                             1 (2%)                                             
      Carcinoma, Metastatic, Adrenal Gland                          1 (5%)                                                          
      Sarcoma Stromal, Metastatic, Uterus              1 (2%)                                                                       
      Squamous Cell Carcinoma, Metastatic,                                                                                          
          Zymbal's Gland                               1 (2%)                                                                       
____________________________________________________________________________________________________________________________________
 SPECIAL SENSES SYSTEM                                                                                                              
   Zymbal's Gland                                     (1)                       (2)                                                 
      Carcinoma                                                                  2 (100%)                                           
      Squamous Cell Carcinoma                          1 (100%)                                                                     
____________________________________________________________________________________________________________________________________
 URINARY SYSTEM                                                                                                                     
   Kidney                                             (50)         (50)         (50)                                                
      Carcinoma                                                     1 (2%)                                                          
      Transitional Epithelium, Carcinoma                                         2 (4%)                                             
   Urinary Bladder                                    (50)         (49)         (49)                                                
                                                             Page   4                                                               
NTP Experiment-Test: 05063-01  INCIDENCE RATES OF NEOPLASMS BY ANATOMIC SITE (SYSTEMIC LESIONS ABRIDGED) (a)      Report: PEIRPT05
Study Type: CHRONIC                                           PHENYLBUTAZONE                                      Date: 09/08/94  
Route: GAVAGE                                                                                                     Time: 19:21:04  
____________________________________________________________________________________________________________________________________
         FISCHER 344 RATS FEMALE                   VEHICLE      0.05G/KG     0.1 G/KG                                               
____________________________________________________________________________________________________________________________________
URINARY SYSTEM - cont                                                                                                               
      Transitional Epithelium, Papilloma                            1 (2%)                                                          
____________________________________________________________________________________________________________________________________
 SYSTEMIC LESIONS                                                                                                                   
   Multiple Organs                                   *(50)        *(50)        *(50)                                                
      Leukemia Mononuclear                            11 (22%)      6 (12%)      4 (8%)                                             
      Mesothelioma Malignant                           1 (2%)                                                                       
____________________________________________________________________________________________________________________________________
     *   Number of animals with any tissue examined microscopically                                                                 
                                                             Page   5                                                               
NTP Experiment-Test: 05063-01  INCIDENCE RATES OF NEOPLASMS BY ANATOMIC SITE (SYSTEMIC LESIONS ABRIDGED) (a)      Report: PEIRPT05
Study Type: CHRONIC                                           PHENYLBUTAZONE                                      Date: 09/08/94  
Route: GAVAGE                                                                                                     Time: 19:21:04  
____________________________________________________________________________________________________________________________________
         FISCHER 344 RATS FEMALE                   VEHICLE      0.05G/KG     0.1 G/KG                                               
____________________________________________________________________________________________________________________________________
TUMOR SUMMARY                                                                                                                       
   Total Animals with Primary Neoplasms (b)            46          46          36                                                   
     Total Primary Neoplasms                          103          84          60                                                   
   Total Animals with Benign Neoplasms                 43          39          35                                                   
     Total Benign Neoplasms                            84          62          47                                                   
   Total Animals with Malignant Neoplasms              19          16          12                                                   
     Total Malignant Neoplasms                         19          22          12                                                   
   Total Animals with Metastatic Neoplasms              2           1                                                               
     Total Metastatic Neoplasm                          3           1                                                               
   Total Animals with Malignant Neoplasms                                                                                           
   Uncertain Primary Site                                                                                                           
   Total Animals with Neoplasms Uncertain-                                                                                          
   Benign or Malignant                                                          1                                                   
     Total Uncertain Neoplasms                                                  1                                                   
____________________________________________________________________________________________________________________________________
a  Number of animals examined microscopically at site and number of animals with lesion                                             
b  Primary tumors: all tumors except metastatic tumors                                                                              
                                                             Page   6                                                               
NTP Experiment-Test: 05063-01  INCIDENCE RATES OF NEOPLASMS BY ANATOMIC SITE (SYSTEMIC LESIONS ABRIDGED) (a)      Report: PEIRPT05
Study Type: CHRONIC                                           PHENYLBUTAZONE                                      Date: 09/08/94  
Route: GAVAGE                                                                                                     Time: 19:21:04  
____________________________________________________________________________________________________________________________________
         FISCHER 344 RATS MALE                     VEHICLE      0.05G/KG     0.1 G/KG                                               
____________________________________________________________________________________________________________________________________
DISPOSITION SUMMARY                                                                                                                 
  Animals Initially in Study                          50           50           50                                                  
  Early Deaths                                                                                                                      
    Moribund Sacrifice                                11           13           16                                                  
    Natural Death                                      6           16            7                                                  
    Accident                                                        1                                                               
  Survivors                                                                                                                         
    Terminal Sacrifice                                32           20           27                                                  
    Terminal Sacrifice                                 1                                                                            
  Animals Examined Microscopically                    50           50           50                                                  
____________________________________________________________________________________________________________________________________
 ALIMENTARY SYSTEM                                                                                                                  
   Intestine Large, Colon                             (50)         (21)         (49)                                                
      Serosa, Sarcoma, Metastatic, Spleen                           1 (5%)                                                          
   Intestine Small, Duodenum                          (50)         (23)         (49)                                                
      Serosa, Ileum, Sarcoma, Metastatic, Spleen                    1 (4%)                                                          
   Intestine Small, Ileum                             (50)         (21)         (49)                                                
      Lymphoid Nodule, Fibrosarcoma, Metastatic,                                                                                    
           Mammary Gland                               1 (2%)                                                                       
   Liver                                              (50)         (50)         (50)                                                
      Neoplastic Nodule                                             1 (2%)       1 (2%)                                             
      Osteosarcoma, Metastatic, Bone                                1 (2%)                                                          
      Serosa, Sarcoma, Metastatic, Spleen                           1 (2%)                                                          
      Serosa, Sarcoma, Metastatic, Uncertain                                                                                        
          Primary Site                                                           1 (2%)                                             
   Mesentery                                          (4)          (5)          (3)                                                 
      Sarcoma, Metastatic, Spleen                                   1 (20%)                                                         
      Sarcoma, Metastatic, Uncertain Primary Site                                1 (33%)                                            
   Pancreas                                           (50)         (27)         (50)                                                
      Adenoma                                          3 (6%)       3 (11%)      4 (8%)                                             
      Sarcoma, Metastatic, Spleen                                   1 (4%)                                                          
   Salivary Glands                                    (49)         (23)         (49)                                                
   Stomach                                            (50)         (50)         (50)                                                
   Stomach, Forestomach                               (50)         (50)         (50)                                                
      Serosa, Sarcoma, Metastatic, Spleen                           1 (2%)                                                          
      Serosa, Glandular, Sarcoma, Metastatic,                                                                                       
          Uncertain Primary Site                                                 1 (2%)                                             
____________________________________________________________________________________________________________________________________
                                                             Page   7                                                               
NTP Experiment-Test: 05063-01  INCIDENCE RATES OF NEOPLASMS BY ANATOMIC SITE (SYSTEMIC LESIONS ABRIDGED) (a)      Report: PEIRPT05
Study Type: CHRONIC                                           PHENYLBUTAZONE                                      Date: 09/08/94  
Route: GAVAGE                                                                                                     Time: 19:21:04  
____________________________________________________________________________________________________________________________________
         FISCHER 344 RATS MALE                     VEHICLE      0.05G/KG     0.1 G/KG                                               
____________________________________________________________________________________________________________________________________
 CARDIOVASCULAR SYSTEM                                                                                                              
   Heart                                              (50)         (20)         (50)                                                
____________________________________________________________________________________________________________________________________
 ENDOCRINE SYSTEM                                                                                                                   
   Adrenal Gland                                      (50)         (49)         (50)                                                
   Adrenal Gland, Cortex                              (50)         (49)         (50)                                                
      Medulla, Osteosarcoma, Metastatic, Bone                       1 (2%)                                                          
   Adrenal Gland, Medulla                             (50)         (48)         (49)                                                
      Pheochromocytoma Malignant                       4 (8%)       2 (4%)       2 (4%)                                             
      Pheochromocytoma Complex                         1 (2%)                    2 (4%)                                             
      Pheochromocytoma Benign                          9 (18%)     13 (27%)     12 (24%)                                            
      Pheochromocytoma Benign, Multiple                2 (4%)       1 (2%)                                                          
      Bilateral, Pheochromocytoma NOS                               1 (2%)                                                          
      Bilateral, Pheochromocytoma Benign               5 (10%)      4 (8%)       7 (14%)                                            
   Islets, Pancreatic                                 (50)         (22)         (50)                                                
      Adenoma                                          2 (4%)       1 (5%)                                                          
      Carcinoma                                        2 (4%)                                                                       
   Pituitary Gland                                    (48)         (26)         (47)                                                
      Pars Distalis, Adenoma                          13 (27%)      9 (35%)     20 (43%)                                            
      Pars Distalis, Adenoma, Multiple                 3 (6%)       1 (4%)       1 (2%)                                             
      Pars Intermedia, Adenoma                                                   1 (2%)                                             
   Thyroid Gland                                      (49)         (21)         (49)                                                
      C-Cell, Adenoma                                  6 (12%)      1 (5%)       2 (4%)                                             
      C-Cell, Carcinoma                                1 (2%)       1 (5%)                                                          
      Follicular Cell, Adenoma                         2 (4%)                    1 (2%)                                             
____________________________________________________________________________________________________________________________________
 GENERAL BODY SYSTEM                                                                                                                
   Tissue NOS                                         (1)                                                                           
      Lipoma                                           1 (100%)                                                                     
____________________________________________________________________________________________________________________________________
 GENITAL SYSTEM                                                                                                                     
   Epididymis                                         (50)         (49)         (50)                                                
      Serosa, Sarcoma, Metastatic, Spleen                           1 (2%)                                                          
      Serosa, Sarcoma, Metastatic, Uncertain                                                                                        
          Primary Site                                                           1 (2%)                                             
   Preputial Gland                                    (43)         (25)         (47)                                                
      Adenocarcinoma                                                1 (4%)       1 (2%)                                             
      Adenoma                                          2 (5%)       4 (16%)                                                         
      Carcinoma                                                                  1 (2%)                                             
      Sarcoma                                          1 (2%)                                                                       
   Prostate                                           (50)         (21)         (46)                                                
                                                             Page   8                                                               
NTP Experiment-Test: 05063-01  INCIDENCE RATES OF NEOPLASMS BY ANATOMIC SITE (SYSTEMIC LESIONS ABRIDGED) (a)      Report: PEIRPT05
Study Type: CHRONIC                                           PHENYLBUTAZONE                                      Date: 09/08/94  
Route: GAVAGE                                                                                                     Time: 19:21:04  
____________________________________________________________________________________________________________________________________
         FISCHER 344 RATS MALE                     VEHICLE      0.05G/KG     0.1 G/KG                                               
____________________________________________________________________________________________________________________________________
GENITAL SYSTEM - cont                                                                                                               
   Seminal Vesicle                                    (49)         (36)         (47)                                                
      Serosa, Sarcoma, Metastatic, Spleen                           1 (3%)                                                          
   Testes                                             (50)         (49)         (50)                                                
      Bilateral, Interstitial Cell, Adenoma           35 (70%)     32 (65%)     38 (76%)                                            
      Interstitial Cell, Adenoma                      11 (22%)      9 (18%)     10 (20%)                                            
      Tunic, Sarcoma, Metastatic, Spleen                            1 (2%)                                                          
____________________________________________________________________________________________________________________________________
 HEMATOPOIETIC SYSTEM                                                                                                               
   Bone Marrow                                        (50)         (20)         (50)                                                
   Lymph Node                                         (50)         (26)         (50)                                                
      Mediastinal, Sarcoma, Metastatic, Spleen                      1 (4%)                                                          
   Lymph Node, Mandibular                             (44)         (18)         (41)                                                
      Fibrosarcoma, Metastatic                         1 (2%)                                                                       
   Lymph Node, Mesenteric                             (47)         (19)         (49)                                                
   Spleen                                             (50)         (32)         (50)                                                
      Sarcoma                                                       1 (3%)       1 (2%)                                             
      Sarcoma, Metastatic, Uncertain Primary Site                                1 (2%)                                             
   Thymus                                             (42)         (18)         (42)                                                
____________________________________________________________________________________________________________________________________
 INTEGUMENTARY SYSTEM                                                                                                               
   Mammary Gland                                      (21)         (8)          (24)                                                
      Fibroadenoma                                     2 (10%)      5 (63%)      3 (13%)                                            
   Skin                                               (50)         (27)         (49)                                                
      Basal Cell Carcinoma                                                       1 (2%)                                             
      Basosquamous Tumor Malignant                                               1 (2%)                                             
      Keratoacanthoma                                  2 (4%)       1 (4%)       1 (2%)                                             
      Squamous Cell Papilloma                                       1 (4%)                                                          
      Sebaceous Gland, Adenoma                                      1 (4%)                                                          
      Subcutaneous Tissue, Fibroma                     3 (6%)       3 (11%)      4 (8%)                                             
      Subcutaneous Tissue, Fibrosarcoma                2 (4%)                                                                       
      Subcutaneous Tissue, Hemangiosarcoma                                       1 (2%)                                             
      Subcutaneous Tissue, Lipoma                                   1 (4%)                                                          
      Subcutaneous Tissue, Myxosarcoma                 1 (2%)                                                                       
      Subcutaneous Tissue, Schwannoma Malignant        1 (2%)                                                                       
____________________________________________________________________________________________________________________________________
 MUSCULOSKELETAL SYSTEM                                                                                                             
   Bone                                               (50)         (21)         (50)                                                
      Scapula, Osteosarcoma                                         1 (5%)                                                          
   Skeletal Muscle                                    (1)          (3)          (1)                                                 
      Osteosarcoma, Extension, Metastatic                           1 (33%)                                                         
      Diaphragm, Sarcoma, Metastatic, Uncertain                                                                                     
                                                             Page   9                                                               
NTP Experiment-Test: 05063-01  INCIDENCE RATES OF NEOPLASMS BY ANATOMIC SITE (SYSTEMIC LESIONS ABRIDGED) (a)      Report: PEIRPT05
Study Type: CHRONIC                                           PHENYLBUTAZONE                                      Date: 09/08/94  
Route: GAVAGE                                                                                                     Time: 19:21:04  
____________________________________________________________________________________________________________________________________
         FISCHER 344 RATS MALE                     VEHICLE      0.05G/KG     0.1 G/KG                                               
____________________________________________________________________________________________________________________________________
MUSCULOSKELETAL SYSTEM - cont                                                                                                       
          Primary Site                                                           1 (100%)                                           
____________________________________________________________________________________________________________________________________
 NERVOUS SYSTEM                                                                                                                     
   Brain                                              (50)         (20)         (50)                                                
      Astrocytoma Malignant                            1 (2%)       1 (5%)       1 (2%)                                             
      Granular Cell Tumor Benign                       1 (2%)                                                                       
____________________________________________________________________________________________________________________________________
 RESPIRATORY SYSTEM                                                                                                                 
   Lung                                               (50)         (34)         (50)                                                
      Alveolar/Bronchiolar Adenoma                                  3 (9%)                                                          
      Alveolar/Bronchiolar Carcinoma                   2 (4%)                                                                       
      Fibrosarcoma, Metastatic, Ear                    1 (2%)                                                                       
      Osteosarcoma, Metastatic, Bone                                1 (3%)                                                          
      Pheochromocytoma Malignant, Metastatic                        1 (3%)                                                          
____________________________________________________________________________________________________________________________________
 SPECIAL SENSES SYSTEM                                                                                                              
   Ear                                                (3)          (1)                                                              
      Pinna, Fibrosarcoma                              1 (33%)                                                                      
   Eye                                                (1)                       (3)                                                 
      Lids, Fibroma                                    1 (100%)                                                                     
   Harderian Gland                                    (1)                                                                           
      Adenoma                                          1 (100%)                                                                     
   Zymbal's Gland                                     (3)          (1)          (1)                                                 
      Carcinoma                                        2 (67%)      1 (100%)     1 (100%)                                           
____________________________________________________________________________________________________________________________________
 URINARY SYSTEM                                                                                                                     
   Kidney                                             (50)         (49)         (50)                                                
      Bilateral, Renal Tubule, Adenoma                                           1 (2%)                                             
      Renal Tubule, Adenoma                                                      2 (4%)                                             
      Renal Tubule, Carcinoma                                       1 (2%)                                                          
   Urinary Bladder                                    (45)         (22)         (48)                                                
      Transitional Epithelium, Papilloma                            2 (9%)                                                          
____________________________________________________________________________________________________________________________________
 SYSTEMIC LESIONS                                                                                                                   
   Multiple Organs                                   *(50)        *(50)        *(50)                                                
      Leukemia Mononuclear                             2 (4%)       2 (4%)       2 (4%)                                             
     *   Number of animals with any tissue examined microscopically                                                                 
                                                             Page  10                                                               
NTP Experiment-Test: 05063-01  INCIDENCE RATES OF NEOPLASMS BY ANATOMIC SITE (SYSTEMIC LESIONS ABRIDGED) (a)      Report: PEIRPT05
Study Type: CHRONIC                                           PHENYLBUTAZONE                                      Date: 09/08/94  
Route: GAVAGE                                                                                                     Time: 19:21:04  
____________________________________________________________________________________________________________________________________
         FISCHER 344 RATS MALE                     VEHICLE      0.05G/KG     0.1 G/KG                                               
____________________________________________________________________________________________________________________________________
 SYSTEMIC LESIONS - cont                                                                                                            
   Multiple Organs                                   *(50)        *(50)        *(50)                                                
      Lymphoma Malignant Lymphocytic                   1 (2%)                                                                       
      Mesothelioma Benign                              1 (2%)                                                                       
      Mesothelioma Malignant                           3 (6%)       4 (8%)       3 (6%)                                             
____________________________________________________________________________________________________________________________________
                                                             Page  11                                                               
NTP Experiment-Test: 05063-01  INCIDENCE RATES OF NEOPLASMS BY ANATOMIC SITE (SYSTEMIC LESIONS ABRIDGED) (a)      Report: PEIRPT05
Study Type: CHRONIC                                           PHENYLBUTAZONE                                      Date: 09/08/94  
Route: GAVAGE                                                                                                     Time: 19:21:04  
____________________________________________________________________________________________________________________________________
         FISCHER 344 RATS MALE                     VEHICLE      0.05G/KG     0.1 G/KG                                               
____________________________________________________________________________________________________________________________________
TUMOR SUMMARY                                                                                                                       
   Total Animals with Primary Neoplasms (b)            50          48          50                                                   
     Total Primary Neoplasms                          130         112         125                                                   
   Total Animals with Benign Neoplasms                 49          47          49                                                   
     Total Benign Neoplasms                           105          96         108                                                   
   Total Animals with Malignant Neoplasms              21          14          14                                                   
     Total Malignant Neoplasms                         25          15          17                                                   
   Total Animals with Metastatic Neoplasms              2           5           2                                                   
     Total Metastatic Neoplasm                          3          17           8                                                   
   Total Animals with Malignant Neoplasms                                       1                                                   
   Uncertain Primary Site                                                                                                           
   Total Animals with Neoplasms Uncertain-                                                                                          
   Benign or Malignant                                              1                                                               
     Total Uncertain Neoplasms                                      1                                                               
____________________________________________________________________________________________________________________________________
a  Number of animals examined microscopically at site and number of animals with lesion                                             
b  Primary tumors: all tumors except metastatic tumors                                                                              
                                                             Page  12                                                               
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