Skip to Main Navigation
Skip to Page Content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it's official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you're on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Share This:
https://ntp.niehs.nih.gov/go/4426

TDMS Study 88127-06 Pathology Tables

NTP Experiment-Test: 88127-06         INCIDENCE RATES OF NONNEOPLASTIC LESIONS BY ANATOMIC SITE (a)               Report: PEIRPT03
Study Type: SUBCHRON 26-WEEK                        PENTAERYTHRITOL TRIACRYLATE (PETA)                            Date: 07/12/02
Route: SKIN APPLICATION                                                                                           Time: 08:37:45

                                                            Final#2




       Facility:  Battelle Columbus Laboratory

       Chemical CAS #:  3524-68-3

       Lock Date:  06/16/99

       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: 88127-06         INCIDENCE RATES OF NONNEOPLASTIC LESIONS BY ANATOMIC SITE (a)               Report: PEIRPT03  
Study Type: SUBCHRON 26-WEEK                        PENTAERYTHRITOL TRIACRYLATE (PETA)                            Date: 07/12/02    
Route: SKIN APPLICATION                                                                                           Time: 08:37:45    
____________________________________________________________________________________________________________________________________
                                                                                                                                    
         MICE:TGAC (FVB/N) HEMIZYGOUS FEMALE       0 MG/KG      0.75         1.5          3 MG/KG      6 MG/KG      12 MG/KG        
                                                                MG/KG        MG/KG                                                  
____________________________________________________________________________________________________________________________________
                                                                                                                                    
DISPOSITION SUMMARY                                                                                                                 
                                                                                                                                    
  Animals Initially In Study                          15           15           15           15           15           15           
  Early Deaths                                                                                                                      
    Natural Death                                      2                         3            3            2            3           
    Moribund Sacrifice                                 1            1                                                   3           
  Survivors                                                                                                                         
    Terminal Sacrifice                                12           14           12           12           13            9           
                                                                                                                                    
  Animals Examined Microscopically                    15           15           15           15           15           15           
____________________________________________________________________________________________________________________________________
                                                                                                                                    
 ALIMENTARY SYSTEM                                                                                                                  
                                                                                                                                    
   Liver                                              (15)         (15)         (15)         (15)         (15)         (15)         
      Hematopoietic Cell Proliferation                                                        1 (7%)       1 (7%)       6 (40%)     
      Infiltration Cellular                                                                                3 (20%)      2 (13%)     
      Inflammation, Chronic Active                    12 (80%)     14 (93%)     11 (73%)     14 (93%)     13 (87%)     11 (73%)     
      Necrosis                                                                                                          1 (7%)      
      Pigmentation                                    11 (73%)     11 (73%)      9 (60%)     13 (87%)      5 (33%)      2 (13%)     
      Bile Duct, Hyperplasia                                                                               1 (7%)                   
      Hepatocyte, Necrosis                             2 (13%)      2 (13%)      2 (13%)      3 (20%)      4 (27%)      2 (13%)     
   Stomach, Forestomach                               (15)         (15)         (15)         (15)         (15)         (15)         
      Hyperkeratosis                                   1 (7%)                    3 (20%)      3 (20%)      4 (27%)      4 (27%)     
      Inflammation                                                                                         2 (13%)                  
      Epithelium, Hyperplasia                          1 (7%)                                              2 (13%)                  
      Epithelium, Ulcer                                                                                    1 (7%)                   
   Tooth                                              (4)                       (3)          (3)          (1)                       
      Inflammation, Chronic Active                                                            1 (33%)                               
____________________________________________________________________________________________________________________________________
                                                                                                                                    
 CARDIOVASCULAR SYSTEM                                                                                                              
                                                                                                                                    
   Heart                                              (15)         (15)         (15)         (15)         (15)         (15)         
      Infiltration Cellular                                                                                             1 (7%)      
      Inflammation, Chronic Active                                  1 (7%)                                              1 (7%)      
____________________________________________________________________________________________________________________________________
                                                                                                                                    
 ENDOCRINE SYSTEM                                                                                                                   
                                                                                                                                    
   Adrenal Cortex                                     (15)         (15)         (15)         (15)         (15)         (15)         
      Hematopoietic Cell Proliferation                                                                                  1 (7%)      
      Necrosis                                                                                                          1 (7%)      
      Capsule, Hyperplasia                             1 (7%)       4 (27%)      7 (47%)      2 (13%)      1 (7%)       2 (13%)     
                                                                                                                                    
a  Number of animals examined microscopically at site and number of animals with lesion                                             
                                                                                                                                    
                                                             Page    2                                                              
                                                                                                                                   
NTP Experiment-Test: 88127-06         INCIDENCE RATES OF NONNEOPLASTIC LESIONS BY ANATOMIC SITE (a)               Report: PEIRPT03  
Study Type: SUBCHRON 26-WEEK                        PENTAERYTHRITOL TRIACRYLATE (PETA)                            Date: 07/12/02    
Route: SKIN APPLICATION                                                                                           Time: 08:37:45    
____________________________________________________________________________________________________________________________________
                                                                                                                                    
         MICE:TGAC (FVB/N) HEMIZYGOUS FEMALE       0 MG/KG      0.75         1.5          3 MG/KG      6 MG/KG      12 MG/KG        
                                                                MG/KG        MG/KG                                                  
____________________________________________________________________________________________________________________________________
                                                                                                                                    
ENDOCRINE SYSTEM - CONT                                                                                                             
   Pituitary Gland                                    (15)         (15)         (14)         (15)         (15)         (15)         
      Pars Distalis, Cyst                              3 (20%)                   2 (14%)      2 (13%)      4 (27%)      2 (13%)     
____________________________________________________________________________________________________________________________________
                                                                                                                                    
 GENERAL BODY SYSTEM                                                                                                                
                                                                                                                                    
   None                                                                                                                             
____________________________________________________________________________________________________________________________________
                                                                                                                                    
 GENITAL SYSTEM                                                                                                                     
                                                                                                                                    
   Ovary                                              (15)         (15)         (15)         (15)         (15)         (15)         
      Cyst                                             1 (7%)                                 1 (7%)       2 (13%)                  
   Uterus                                             (15)         (15)         (15)         (15)         (15)         (15)         
      Hydrometra                                       1 (7%)                                                           2 (13%)     
      Endometrium, Hyperplasia, Cystic                11 (73%)      9 (60%)      7 (47%)     10 (67%)     11 (73%)      7 (47%)     
____________________________________________________________________________________________________________________________________
                                                                                                                                    
 HEMATOPOIETIC SYSTEM                                                                                                               
                                                                                                                                    
   Lymph Node                                         (15)         (14)         (13)         (12)         (15)         (14)         
      Hematopoietic Cell Proliferation                                                                                  2 (14%)     
      Inguinal, Hematopoietic Cell Proliferation                                                                        1 (7%)      
      Inguinal, Hyperplasia                                                                                             1 (7%)      
      Inguinal, Infiltration Cellular                                                                                   1 (7%)      
      Inguinal, Infiltration Cellular, Plasma Cell                                                                      1 (7%)      
      Mediastinal, Hematopoietic Cell Proliferation                                                                     1 (7%)      
      Mediastinal, Hyperplasia                                                                                          1 (7%)      
      Mediastinal, Infiltration Cellular                                                                   3 (20%)      1 (7%)      
      Mediastinal, Infiltration Cellular, Plasma                                                                                    
        Cell                                                                                                            1 (7%)      
      Mediastinal, Necrosis, Lymphoid                                            1 (8%)                                             
   Lymph Node, Mandibular                             (15)         (15)         (15)         (15)         (15)         (13)         
      Hematopoietic Cell Proliferation                                                                     1 (7%)       8 (62%)     
      Hyperplasia                                      3 (20%)                   1 (7%)       5 (33%)      3 (20%)      1 (8%)      
      Infiltration Cellular                                                                   1 (7%)       2 (13%)      2 (15%)     
      Infiltration Cellular, Plasma Cell                                                                   1 (7%)       1 (8%)      
      Necrosis, Lymphoid                                            1 (7%)       1 (7%)                                             
   Lymph Node, Mesenteric                             (14)         (15)         (15)         (14)         (15)         (15)         
      Infiltration Cellular                                                                                4 (27%)                  
      Necrosis, Lymphoid                                            1 (7%)                                                          
   Spleen                                             (15)         (15)         (15)         (15)         (15)         (15)         
      Depletion Cellular                               2 (13%)      1 (7%)       2 (13%)      1 (7%)       2 (13%)      3 (20%)     
                                                                                                                                    
a  Number of animals examined microscopically at site and number of animals with lesion                                             
                                                                                                                                    
                                                             Page    3                                                              
                                                                                                                                   
NTP Experiment-Test: 88127-06         INCIDENCE RATES OF NONNEOPLASTIC LESIONS BY ANATOMIC SITE (a)               Report: PEIRPT03  
Study Type: SUBCHRON 26-WEEK                        PENTAERYTHRITOL TRIACRYLATE (PETA)                            Date: 07/12/02    
Route: SKIN APPLICATION                                                                                           Time: 08:37:45    
____________________________________________________________________________________________________________________________________
                                                                                                                                    
         MICE:TGAC (FVB/N) HEMIZYGOUS FEMALE       0 MG/KG      0.75         1.5          3 MG/KG      6 MG/KG      12 MG/KG        
                                                                MG/KG        MG/KG                                                  
____________________________________________________________________________________________________________________________________
                                                                                                                                    
HEMATOPOIETIC SYSTEM - CONT                                                                                                         
      Hematopoietic Cell Proliferation                                                        2 (13%)     11 (73%)     11 (73%)     
      Infiltration Cellular                                                                                1 (7%)       1 (7%)      
      Necrosis, Lymphoid                                            1 (7%)       1 (7%)                    1 (7%)                   
   Thymus                                             (15)         (15)         (15)         (14)         (14)         (15)         
      Atrophy                                          3 (20%)                   2 (13%)      2 (14%)      3 (21%)      6 (40%)     
      Pigmentation                                                                            1 (7%)                                
      Thymocyte, Necrosis                                           1 (7%)       2 (13%)      2 (14%)                   5 (33%)     
____________________________________________________________________________________________________________________________________
                                                                                                                                    
 INTEGUMENTARY SYSTEM                                                                                                               
                                                                                                                                    
   Skin                                               (15)         (15)         (15)         (15)         (15)         (15)         
      Epidermis, Skin, Site of Application,                                                                                         
        Hyperplasia                                                              5 (33%)     14 (93%)     14 (93%)     14 (93%)     
      Epidermis, Skin, Site of Application, Ulcer                                                                       1 (7%)      
      Sebaceous Gland, Skin, Site of Application,                                                                                   
         Hyperplasia, Adenomatous                                                                          1 (7%)                   
      Skin, Site of Application, Cyst Epithelial                                                                                    
        Inclusion                                                                                          1 (7%)       1 (7%)      
      Skin, Site of Application, Hyperkeratosis        1 (7%)                    4 (27%)     14 (93%)     11 (73%)     13 (87%)     
      Skin, Site of Application, Inflammation,                                                                                      
         Chronic Active                                                          1 (7%)       9 (60%)     10 (67%)     15 (100%)    
      Subcutaneous Tissue, Hemorrhage                                                         1 (7%)                                
____________________________________________________________________________________________________________________________________
                                                                                                                                    
 MUSCULOSKELETAL SYSTEM                                                                                                             
                                                                                                                                    
   None                                                                                                                             
____________________________________________________________________________________________________________________________________
                                                                                                                                    
 NERVOUS SYSTEM                                                                                                                     
                                                                                                                                    
   None                                                                                                                             
____________________________________________________________________________________________________________________________________
                                                                                                                                    
 RESPIRATORY SYSTEM                                                                                                                 
                                                                                                                                    
   Lung                                               (15)         (15)         (15)         (15)         (15)         (15)         
      Infiltration Cellular                                                                                             1 (7%)      
      Infiltration Cellular, Mononuclear Cell                                    1 (7%)                                             
      Inflammation, Chronic Active                                                            1 (7%)                    1 (7%)      
      Alveolar Epithelium, Hyperplasia                                                                     1 (7%)                   
____________________________________________________________________________________________________________________________________
                                                                                                                                    
a  Number of animals examined microscopically at site and number of animals with lesion                                             
                                                                                                                                    
                                                             Page    4                                                              
                                                                                                                                   
NTP Experiment-Test: 88127-06         INCIDENCE RATES OF NONNEOPLASTIC LESIONS BY ANATOMIC SITE (a)               Report: PEIRPT03  
Study Type: SUBCHRON 26-WEEK                        PENTAERYTHRITOL TRIACRYLATE (PETA)                            Date: 07/12/02    
Route: SKIN APPLICATION                                                                                           Time: 08:37:45    
____________________________________________________________________________________________________________________________________
                                                                                                                                    
         MICE:TGAC (FVB/N) HEMIZYGOUS FEMALE       0 MG/KG      0.75         1.5          3 MG/KG      6 MG/KG      12 MG/KG        
                                                                MG/KG        MG/KG                                                  
____________________________________________________________________________________________________________________________________
                                                                                                                                    
                                                                                                                                    
 SPECIAL SENSES SYSTEM                                                                                                              
                                                                                                                                    
   None                                                                                                                             
____________________________________________________________________________________________________________________________________
                                                                                                                                    
 URINARY SYSTEM                                                                                                                     
                                                                                                                                    
   Kidney                                             (15)         (15)         (15)         (15)         (15)         (15)         
      Inflammation, Chronic Active                     1 (7%)       2 (13%)      1 (7%)       1 (7%)       1 (7%)       1 (7%)      
      Nephropathy                                      3 (20%)                                                          2 (13%)     
      Polyarteritis                                    1 (7%)                                                                       
      Cortex, Cyst                                                                                                      2 (13%)     
      Papilla, Necrosis                                                          1 (7%)                                             
      Renal Tubule, Degeneration                                                                                        1 (7%)      
      Renal Tubule, Hyperplasia                                                  1 (7%)       1 (7%)                                
      Renal Tubule, Necrosis                                                                                            2 (13%)     
      Renal Tubule, Regeneration                       1 (7%)       1 (7%)                    2 (13%)      1 (7%)                   
                                                                                                                                    
                                                                                                                                    
a  Number of animals examined microscopically at site and number of animals with lesion                                             
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                             Page    5                                                              
                                                                                                                                   
NTP Experiment-Test: 88127-06         INCIDENCE RATES OF NONNEOPLASTIC LESIONS BY ANATOMIC SITE (a)               Report: PEIRPT03  
Study Type: SUBCHRON 26-WEEK                        PENTAERYTHRITOL TRIACRYLATE (PETA)                            Date: 07/12/02    
Route: SKIN APPLICATION                                                                                           Time: 08:37:45    
____________________________________________________________________________________________________________________________________
                                                                                                                                    
         MICE:TGAC (FVB/N) HEMIZYGOUS MALE         0 MG/KG      0.75         1.5          3 MG/KG      6 MG/KG      12 MG/KG        
                                                                MG/KG        MG/KG                                                  
____________________________________________________________________________________________________________________________________
                                                                                                                                    
DISPOSITION SUMMARY                                                                                                                 
                                                                                                                                    
  Animals Initially In Study                          15           15           15           15           15           15           
  Early Deaths                                                                                                                      
    Natural Death                                      3                                                   2            5           
    Moribund Sacrifice                                              1                                      1                        
  Survivors                                                                                                                         
    Terminal Sacrifice                                12           14           15           15           12           10           
                                                                                                                                    
  Animals Examined Microscopically                    15           15           15           15           15           15           
____________________________________________________________________________________________________________________________________
                                                                                                                                    
 ALIMENTARY SYSTEM                                                                                                                  
                                                                                                                                    
   Liver                                              (15)         (15)         (15)         (15)         (15)         (15)         
      Atrophy                                          1 (7%)                                                                       
      Hematopoietic Cell Proliferation                                                                     2 (13%)                  
      Infiltration Cellular                                                                                5 (33%)      3 (20%)     
      Inflammation, Chronic Active                     5 (33%)     11 (73%)     10 (67%)     13 (87%)     13 (87%)      5 (33%)     
      Mineralization                                   1 (7%)                                                                       
      Myelodysplasia                                                                                                    5 (33%)     
      Pigmentation                                                  1 (7%)       1 (7%)                                             
      Hepatocyte, Necrosis                             1 (7%)                    1 (7%)                    1 (7%)       1 (7%)      
      Hepatocyte, Vacuolization Cytoplasmic                                      1 (7%)                                             
   Salivary Glands                                    (1)          (1)                       (1)                       (2)          
      Parotid Gland, Infiltration Cellular                                                                              1 (50%)     
   Stomach, Forestomach                               (15)         (15)         (15)         (15)         (15)         (15)         
      Hyperkeratosis                                   2 (13%)                   1 (7%)                    3 (20%)      4 (27%)     
      Epithelium, Hyperplasia                                                    1 (7%)                                             
____________________________________________________________________________________________________________________________________
                                                                                                                                    
 CARDIOVASCULAR SYSTEM                                                                                                              
                                                                                                                                    
   Heart                                              (15)         (15)         (15)         (15)         (15)         (15)         
      Infiltration Cellular                                                                                             3 (20%)     
      Inflammation, Chronic Active                                  3 (20%)                                1 (7%)                   
      Myelodysplasia                                                                                                    3 (20%)     
____________________________________________________________________________________________________________________________________
                                                                                                                                    
 ENDOCRINE SYSTEM                                                                                                                   
                                                                                                                                    
   Adrenal Cortex                                     (15)         (15)         (15)         (15)         (15)         (15)         
      Hypertrophy                                      7 (47%)     10 (67%)      3 (20%)      5 (33%)      1 (7%)       3 (20%)     
      Myelodysplasia                                                                                                    2 (13%)     
                                                                                                                                    
a  Number of animals examined microscopically at site and number of animals with lesion                                             
                                                                                                                                    
                                                             Page    6                                                              
                                                                                                                                   
NTP Experiment-Test: 88127-06         INCIDENCE RATES OF NONNEOPLASTIC LESIONS BY ANATOMIC SITE (a)               Report: PEIRPT03  
Study Type: SUBCHRON 26-WEEK                        PENTAERYTHRITOL TRIACRYLATE (PETA)                            Date: 07/12/02    
Route: SKIN APPLICATION                                                                                           Time: 08:37:45    
____________________________________________________________________________________________________________________________________
                                                                                                                                    
         MICE:TGAC (FVB/N) HEMIZYGOUS MALE         0 MG/KG      0.75         1.5          3 MG/KG      6 MG/KG      12 MG/KG        
                                                                MG/KG        MG/KG                                                  
____________________________________________________________________________________________________________________________________
                                                                                                                                    
ENDOCRINE SYSTEM - CONT                                                                                                             
   Adrenal Medulla                                    (15)         (15)         (15)         (15)         (15)         (15)         
      Infiltration Cellular                                                                                             2 (13%)     
      Myelodysplasia                                                                                                    2 (13%)     
   Pituitary Gland                                    (15)         (14)         (15)         (15)         (15)         (15)         
      Pars Distalis, Cyst                              1 (7%)                                              3 (20%)                  
   Thyroid Gland                                      (15)         (15)         (15)         (15)         (15)         (15)         
      Inflammation, Chronic Active                                                                         1 (7%)                   
      Myelodysplasia                                                                                                    1 (7%)      
____________________________________________________________________________________________________________________________________
                                                                                                                                    
 GENERAL BODY SYSTEM                                                                                                                
                                                                                                                                    
   None                                                                                                                             
____________________________________________________________________________________________________________________________________
                                                                                                                                    
 GENITAL SYSTEM                                                                                                                     
                                                                                                                                    
   Epididymis                                         (15)         (14)         (15)         (15)         (15)         (15)         
      Infiltration Cellular                                                                                5 (33%)      5 (33%)     
      Inflammation, Chronic Active                                  1 (7%)                                              4 (27%)     
      Myelodysplasia                                                                                                    5 (33%)     
      Bilateral, Hypospermia                                                                                            1 (7%)      
      Unilateral, Hypospermia                          1 (7%)       1 (7%)                                              2 (13%)     
   Preputial Gland                                                                                                     (1)          
      Duct, Ectasia                                                                                                     1 (100%)    
   Testes                                             (15)         (15)         (15)         (15)         (15)         (15)         
      Cyst                                             2 (13%)      1 (7%)                    1 (7%)       1 (7%)                   
      Bilateral, Germinal Epithelium, Degeneration                                                         1 (7%)                   
      Unilateral, Germinal Epithelium, Degeneration    1 (7%)       1 (7%)                    2 (13%)      1 (7%)       4 (27%)     
____________________________________________________________________________________________________________________________________
                                                                                                                                    
 HEMATOPOIETIC SYSTEM                                                                                                               
                                                                                                                                    
   Bone Marrow                                                                                                         (1)          
      Myeloid Cell, Hyperplasia                                                                                         1 (100%)    
   Lymph Node                                         (14)         (15)         (14)         (13)         (15)         (14)         
      Hyperplasia                                                                                          1 (7%)                   
      Infiltration Cellular, Plasma Cell                                                                   1 (7%)                   
      Inflammation, Chronic Active                                                                         1 (7%)                   
      Myelodysplasia                                                                                                    1 (7%)      
      Axillary, Hyperplasia, Lymphoid                                                                                   1 (7%)      
      Axillary, Infiltration Cellular                                                                      1 (7%)       1 (7%)      
      Axillary, Infiltration Cellular, Plasma Cell                                                         1 (7%)       1 (7%)      
                                                                                                                                    
a  Number of animals examined microscopically at site and number of animals with lesion                                             
                                                                                                                                    
                                                             Page    7                                                              
                                                                                                                                   
NTP Experiment-Test: 88127-06         INCIDENCE RATES OF NONNEOPLASTIC LESIONS BY ANATOMIC SITE (a)               Report: PEIRPT03  
Study Type: SUBCHRON 26-WEEK                        PENTAERYTHRITOL TRIACRYLATE (PETA)                            Date: 07/12/02    
Route: SKIN APPLICATION                                                                                           Time: 08:37:45    
____________________________________________________________________________________________________________________________________
                                                                                                                                    
         MICE:TGAC (FVB/N) HEMIZYGOUS MALE         0 MG/KG      0.75         1.5          3 MG/KG      6 MG/KG      12 MG/KG        
                                                                MG/KG        MG/KG                                                  
____________________________________________________________________________________________________________________________________
                                                                                                                                    
HEMATOPOIETIC SYSTEM - CONT                                                                                                         
      Axillary, Infiltration Cellular, Histiocyte                                                                       1 (7%)      
      Inguinal, Myelodysplasia                                                                                          1 (7%)      
      Mediastinal, Hyperplasia                                                                             1 (7%)                   
      Mediastinal, Infiltration Cellular                                                                   4 (27%)      2 (14%)     
      Mediastinal, Myelodysplasia                                                                                       1 (7%)      
   Lymph Node, Mandibular                             (15)         (15)         (15)         (15)         (15)         (15)         
      Hematopoietic Cell Proliferation                                                                     3 (20%)                  
      Hyperplasia                                                                2 (13%)      1 (7%)       2 (13%)                  
      Hyperplasia, Plasma Cell                                                                                          1 (7%)      
      Infiltration Cellular                                                                                5 (33%)      6 (40%)     
      Infiltration Cellular, Plasma Cell                                                                   1 (7%)       6 (40%)     
      Myelodysplasia                                                                                                    2 (13%)     
      Necrosis, Lymphoid                                                                                   2 (13%)                  
   Lymph Node, Mesenteric                             (12)         (15)         (15)         (15)         (15)         (14)         
      Hematopoietic Cell Proliferation                                                                     1 (7%)       1 (7%)      
      Infiltration Cellular                                                                                4 (27%)      2 (14%)     
      Myelodysplasia                                                                                                    3 (21%)     
      Necrosis, Lymphoid                                                                                   1 (7%)                   
   Spleen                                             (15)         (15)         (15)         (15)         (15)         (15)         
      Atrophy                                          1 (7%)                                                                       
      Depletion Cellular                                                                                   2 (13%)      2 (13%)     
      Hematopoietic Cell Proliferation                 1 (7%)       2 (13%)      1 (7%)       2 (13%)      9 (60%)      8 (53%)     
      Infiltration Cellular                                                                                1 (7%)       4 (27%)     
      Myelodysplasia                                                                                                    4 (27%)     
      Necrosis, Lymphoid                                                                                   2 (13%)      1 (7%)      
   Thymus                                             (15)         (15)         (15)         (15)         (14)         (14)         
      Atrophy                                          4 (27%)      1 (7%)       2 (13%)                   4 (29%)      5 (36%)     
      Myelodysplasia                                                                                                    3 (21%)     
      Thymocyte, Necrosis                                                                                  2 (14%)                  
____________________________________________________________________________________________________________________________________
                                                                                                                                    
 INTEGUMENTARY SYSTEM                                                                                                               
                                                                                                                                    
   Skin                                               (15)         (15)         (15)         (15)         (15)         (15)         
      Dermis, Skin, Site of Application, Necrosis                                                                       1 (7%)      
      Epidermis, Skin, Site of Application,                                                                                         
        Hyperplasia                                                              3 (20%)      8 (53%)     10 (67%)     14 (93%)     
      Epidermis, Skin, Site of Application, Ulcer                                                          1 (7%)                   
      Skin, Site of Application, Cyst Epithelial                                                                                    
        Inclusion                                                                                                       1 (7%)      
      Skin, Site of Application, Hyperkeratosis        1 (7%)                    2 (13%)      6 (40%)     10 (67%)     13 (87%)     
      Skin, Site of Application, Inflammation,                                                                                      
         Chronic Active                                                                       2 (13%)      5 (33%)     12 (80%)     
                                                                                                                                    
a  Number of animals examined microscopically at site and number of animals with lesion                                             
                                                                                                                                    
                                                             Page    8                                                              
                                                                                                                                   
NTP Experiment-Test: 88127-06         INCIDENCE RATES OF NONNEOPLASTIC LESIONS BY ANATOMIC SITE (a)               Report: PEIRPT03  
Study Type: SUBCHRON 26-WEEK                        PENTAERYTHRITOL TRIACRYLATE (PETA)                            Date: 07/12/02    
Route: SKIN APPLICATION                                                                                           Time: 08:37:45    
____________________________________________________________________________________________________________________________________
                                                                                                                                    
         MICE:TGAC (FVB/N) HEMIZYGOUS MALE         0 MG/KG      0.75         1.5          3 MG/KG      6 MG/KG      12 MG/KG        
                                                                MG/KG        MG/KG                                                  
____________________________________________________________________________________________________________________________________
                                                                                                                                    
                                                                                                                                    
 MUSCULOSKELETAL SYSTEM                                                                                                             
                                                                                                                                    
   None                                                                                                                             
____________________________________________________________________________________________________________________________________
                                                                                                                                    
 NERVOUS SYSTEM                                                                                                                     
                                                                                                                                    
   None                                                                                                                             
____________________________________________________________________________________________________________________________________
                                                                                                                                    
 RESPIRATORY SYSTEM                                                                                                                 
                                                                                                                                    
   Lung                                               (15)         (15)         (15)         (15)         (15)         (15)         
      Infiltration Cellular                                                                                1 (7%)       3 (20%)     
      Inflammation, Chronic Active                                                                         1 (7%)       2 (13%)     
      Myelodysplasia                                                                                                    3 (20%)     
      Alveolar Epithelium, Hyperplasia                                           1 (7%)                                             
      Mediastinum, Infiltration Cellular                                                                                1 (7%)      
____________________________________________________________________________________________________________________________________
                                                                                                                                    
 SPECIAL SENSES SYSTEM                                                                                                              
                                                                                                                                    
   None                                                                                                                             
____________________________________________________________________________________________________________________________________
                                                                                                                                    
 URINARY SYSTEM                                                                                                                     
                                                                                                                                    
   Kidney                                             (15)         (15)         (15)         (15)         (15)         (15)         
      Hydronephrosis                                                                                                    1 (7%)      
      Infarct                                                                    1 (7%)       2 (13%)                               
      Infiltration Cellular                                                                                2 (13%)      3 (20%)     
      Inflammation, Chronic Active                     1 (7%)                    4 (27%)      4 (27%)      3 (20%)                  
      Mineralization                                                                                       1 (7%)                   
      Myelodysplasia                                                                                                    4 (27%)     
      Nephropathy                                      6 (40%)      1 (7%)                                                          
      Pigmentation                                     1 (7%)                                                                       
      Cortex, Cyst                                                  1 (7%)                    1 (7%)       1 (7%)       1 (7%)      
      Renal Tubule, Dilatation                                                                1 (7%)                                
      Renal Tubule, Regeneration                       1 (7%)       2 (13%)                   3 (20%)                               
                                                                                                                                    
                                                                                                                                    
a  Number of animals examined microscopically at site and number of animals with lesion                                             
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                             Page    9                                                              
                                                                                                                                   
                             ------------------------------------------------------------                                           
                             ----------              END OF REPORT             ----------                                           
                             ------------------------------------------------------------