National Toxicology Program

National Toxicology Program
https://ntp.niehs.nih.gov/go/5254

TDMS Study 96007-03 Pathology Tables

NTP Experiment-Test: 96007-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04
Study Type: CHRONIC                             TOXIC EQUIVALENCY FACTOR EVALUATION (TCDD)                        Date: 11/25/02
Route: GAVAGE                                                                                                     Time: 11:41:30

                                                          14 WEEK SSAC




       Facility:  Battelle Columbus Laboratory

       Chemical CAS #:  1746-01-6

       Lock Date:  06/28/01

       Cage Range:  All

       Reasons For Removal:    25017 Scheduled Sacrifice

       Removal Date Range:     09/02/98 - 09/03/98

       Treatment Groups:       Include 001    0 NG/KG
                               Include 002    3 NG/KG
                               Include 003    10 NG/KG
                               Include 004    22 NG/KG
                               Include 005    46 NG/KG
                               Include 006    100     NG/KG





























Note:  Animals arranged according to CID number

                                                              Page   1


NTP Experiment-Test: 96007-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                             TOXIC EQUIVALENCY FACTOR EVALUATION (TCDD)                        Date: 11/25/02    
Route: GAVAGE                                                                                                     Time: 11:41:30    
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|                          |            |
                             DAY ON TEST   | 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9|                          |            |
                                           | 5| 5| 4| 4| 4| 4| 4| 5| 5| 4| 4| 4| 4| 4| 5| 5|                          |            |
 __________________________________________|__________________________________________________________________________|     T (*)  |
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|                          |     O      |
   SPRAGUE-DAWLEY RATS FEMALE              | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|                          |     T      |
                               ANIMAL ID   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|                          |     A      |
    0 NG/KG                                | 3| 5| 5| 5| 5| 5| 5| 5| 6| 7| 7| 7| 7| 8| 8| 9|                          |     L      |
                                           | 2| 0| 1| 2| 3| 4| 5| 9| 0| 6| 7| 8| 9| 0| 9| 5|                          |            |
 _____________________________________________________________________________________________________________________|____________|
 ALIMENTARY SYSTEM                         |                                                                          |            |
                                           |__________________________________________________________________________|____________|
   Liver                                   |       +  +  +  +  +        +  +  +  +  +                                 |  10        |
                                           |__________________________________________________________________________|____________|
   Pancreas                                |       +  +  +  +  +        +  +  +  +  +                                 |  10        |
                                           |__________________________________________________________________________|____________|
   Stomach, Forestomach                    |       +  +  +  +  +        +  +  +  +  +                                 |  10        |
                                           |__________________________________________________________________________|____________|
   Stomach, Glandular                      |       +  +  +  +  +        +  +  +  +  +                                 |  10        |
 _____________________________________________________________________________________________________________________|            |
 CARDIOVASCULAR SYSTEM                     |                                                                          |            |
    None                                   |                                                                          |            |
 _____________________________________________________________________________________________________________________|            |
 ENDOCRINE SYSTEM                          |                                                                          |            |
                                           |__________________________________________________________________________|____________|
   Adrenal Cortex                          |       +  +  +  +  +        +  +  +  +  +                                 |  10        |
                                           |__________________________________________________________________________|____________|
   Adrenal Medulla                         |       +  +  +  +  +        +  +  +  +  +                                 |  10        |
                                           |__________________________________________________________________________|____________|
   Islets, Pancreatic                      |       +  +  +  +  +        +  +  +  +  +                                 |  10        |
                                           |__________________________________________________________________________|____________|
   Pituitary Gland                         |       +  +  +  +  +        +  +  +  +  +                                 |  10        |
                                           |__________________________________________________________________________|____________|
   Thyroid Gland                           |       +  +  +  +  +        +  +  +  +  +                                 |  10        |
 _____________________________________________________________________________________________________________________|            |
 GENERAL BODY SYSTEM                       |                                                                          |            |
    None                                   |                                                                          |            |
 _____________________________________________________________________________________________________________________|            |
 GENITAL SYSTEM                            |                                                                          |            |
                                           |__________________________________________________________________________|____________|
   Ovary                                   |       +  +  +  +  +        +  +  +  +  +                                 |  10        |
                                           |__________________________________________________________________________|____________|
   Uterus                                  |       +  +  +  +  +        +  +  +  +  +                                 |  10        |
                                           |__________________________________________________________________________|____________|
 _____________________________________________________________________________________________________________________|____________|
                                                                                                                                    
                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  
                                                                                                                                    
                                                                                                                                    
                                                             Page   2                                                               
                                                                                                                                   
NTP Experiment-Test: 96007-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                             TOXIC EQUIVALENCY FACTOR EVALUATION (TCDD)                        Date: 11/25/02    
Route: GAVAGE                                                                                                     Time: 11:41:30    
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|                          |            |
                             DAY ON TEST   | 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9|                          |            |
                                           | 5| 5| 4| 4| 4| 4| 4| 5| 5| 4| 4| 4| 4| 4| 5| 5|                          |            |
 __________________________________________|__________________________________________________________________________|     T (*)  |
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|                          |     O      |
   SPRAGUE-DAWLEY RATS FEMALE              | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|                          |     T      |
                               ANIMAL ID   | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|                          |     A      |
    0 NG/KG                                | 3| 5| 5| 5| 5| 5| 5| 5| 6| 7| 7| 7| 7| 8| 8| 9|                          |     L      |
                                           | 2| 0| 1| 2| 3| 4| 5| 9| 0| 6| 7| 8| 9| 0| 9| 5|                          |            |
 _____________________________________________________________________________________________________________________|____________|
 GENITAL SYSTEM - cont                     |                                                                          |            |
                                           |                                                                          |            |
   Vagina                                  |       +  +  +  +  +        +  +  +  +  +                                 |  10        |
 _____________________________________________________________________________________________________________________|            |
 HEMATOPOIETIC SYSTEM                      |                                                                          |            |
                                           |__________________________________________________________________________|____________|
   Spleen                                  |       +  +  +  +  +        +  +  +  +  +                                 |  10        |
                                           |__________________________________________________________________________|____________|
   Thymus                                  |       +  +  +  +  +        +  +  +  +  +                                 |  10        |
 _____________________________________________________________________________________________________________________|            |
 INTEGUMENTARY SYSTEM                      |                                                                          |            |
                                           |__________________________________________________________________________|____________|
   Mammary Gland                           |       +  +  +  +  +        +  +  +  +  +                                 |  10        |
      Carcinoma                            |                   X                                                      |          1 |
 _____________________________________________________________________________________________________________________|            |
 MUSCULOSKELETAL SYSTEM                    |                                                                          |            |
    None                                   |                                                                          |            |
 _____________________________________________________________________________________________________________________|            |
 NERVOUS SYSTEM                            |                                                                          |            |
    None                                   |                                                                          |            |
 _____________________________________________________________________________________________________________________|            |
 RESPIRATORY SYSTEM                        |                                                                          |            |
                                           |__________________________________________________________________________|____________|
   Lung                                    |       +  +  +  +  +        +  +  +  +  +                                 |  10        |
 _____________________________________________________________________________________________________________________|            |
 SPECIAL SENSES SYSTEM                     |                                                                          |            |
    None                                   |                                                                          |            |
 _____________________________________________________________________________________________________________________|            |
 URINARY SYSTEM                            |                                                                          |            |
    None                                   |                                                                          |            |
 _____________________________________________________________________________________________________________________|____________|
                                           |__________________________________________________________________________|____________|
 __________________________________________________________________________________________________________________________________ 
 SYSTEMIC LESIONS                          |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Multiple Organs                         |       +  +  +  +  +        +  +  +  +  +                                 |  10        |
 __________________________________________________________________________________________________________________________________ 
                                                                                                                                    
                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  
                                                             Page   3                                                               
                                                                                                                                   
NTP Experiment-Test: 96007-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                             TOXIC EQUIVALENCY FACTOR EVALUATION (TCDD)                        Date: 11/25/02    
Route: GAVAGE                                                                                                     Time: 11:41:30    
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|                          |            |
                             DAY ON TEST   | 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9|                          |            |
                                           | 5| 4| 4| 4| 4| 4| 5| 5| 5| 4| 4| 4| 4| 4| 5| 5|                          |            |
 __________________________________________|__________________________________________________________________________|     T (*)  |
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|                          |     O      |
   SPRAGUE-DAWLEY RATS FEMALE              | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|                          |     T      |
                               ANIMAL ID   | 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1|                          |     A      |
    3 NG/KG                                | 2| 3| 3| 3| 3| 4| 4| 5| 6| 7| 7| 7| 7| 7| 8| 8|                          |     L      |
                                           | 7| 6| 7| 8| 9| 0| 3| 2| 9| 1| 2| 3| 4| 5| 0| 5|                          |            |
 _____________________________________________________________________________________________________________________|____________|
 ALIMENTARY SYSTEM                         |                                                                          |            |
                                           |__________________________________________________________________________|____________|
   Liver                                   |    +  +  +  +  +           +  +  +  +  +                                 |  10        |
                                           |__________________________________________________________________________|____________|
   Pancreas                                |    +  +  +  +  +           +  +  +  +  +                                 |  10        |
 _____________________________________________________________________________________________________________________|            |
 CARDIOVASCULAR SYSTEM                     |                                                                          |            |
    None                                   |                                                                          |            |
 _____________________________________________________________________________________________________________________|            |
 ENDOCRINE SYSTEM                          |                                                                          |            |
                                           |__________________________________________________________________________|____________|
   Adrenal Cortex                          |    +  +  +  +  +           +  +  +  +  +                                 |  10        |
                                           |__________________________________________________________________________|____________|
   Thyroid Gland                           |    +  +  +  +  +           +  +  +  +  +                                 |  10        |
 _____________________________________________________________________________________________________________________|            |
 GENERAL BODY SYSTEM                       |                                                                          |            |
    None                                   |                                                                          |            |
 _____________________________________________________________________________________________________________________|            |
 GENITAL SYSTEM                            |                                                                          |            |
                                           |__________________________________________________________________________|____________|
   Uterus                                  |                               +                                          |   1        |
      Deciduoma Benign                     |                               X                                          |          1 |
 _____________________________________________________________________________________________________________________|            |
 HEMATOPOIETIC SYSTEM                      |                                                                          |            |
                                           |__________________________________________________________________________|____________|
   Thymus                                  |    +  +  +  +  +           +  +  +  +  +                                 |  10        |
 _____________________________________________________________________________________________________________________|            |
 INTEGUMENTARY SYSTEM                      |                                                                          |            |
    None                                   |                                                                          |            |
 _____________________________________________________________________________________________________________________|            |
 MUSCULOSKELETAL SYSTEM                    |                                                                          |            |
    None                                   |                                                                          |            |
 _____________________________________________________________________________________________________________________|            |
 NERVOUS SYSTEM                            |                                                                          |            |
    None                                   |                                                                          |            |
 _____________________________________________________________________________________________________________________|____________|
                                                                                                                                    
                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  
                                                                                                                                    
                                                             Page   4                                                               
                                                                                                                                   
NTP Experiment-Test: 96007-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                             TOXIC EQUIVALENCY FACTOR EVALUATION (TCDD)                        Date: 11/25/02    
Route: GAVAGE                                                                                                     Time: 11:41:30    
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|                          |            |
                             DAY ON TEST   | 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9|                          |            |
                                           | 5| 4| 4| 4| 4| 4| 5| 5| 5| 4| 4| 4| 4| 4| 5| 5|                          |            |
 __________________________________________|__________________________________________________________________________|     T (*)  |
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|                          |     O      |
   SPRAGUE-DAWLEY RATS FEMALE              | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|                          |     T      |
                               ANIMAL ID   | 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1|                          |     A      |
    3 NG/KG                                | 2| 3| 3| 3| 3| 4| 4| 5| 6| 7| 7| 7| 7| 7| 8| 8|                          |     L      |
                                           | 7| 6| 7| 8| 9| 0| 3| 2| 9| 1| 2| 3| 4| 5| 0| 5|                          |            |
 _____________________________________________________________________________________________________________________|____________|
 RESPIRATORY SYSTEM                        |                                                                          |            |
                                           |__________________________________________________________________________|____________|
   Lung                                    |    +  +  +  +  +           +  +  +  +  +                                 |  10        |
 _____________________________________________________________________________________________________________________|            |
 SPECIAL SENSES SYSTEM                     |                                                                          |            |
    None                                   |                                                                          |            |
 _____________________________________________________________________________________________________________________|            |
 URINARY SYSTEM                            |                                                                          |            |
    None                                   |                                                                          |            |
 _____________________________________________________________________________________________________________________|____________|
                                           |__________________________________________________________________________|____________|
 __________________________________________________________________________________________________________________________________ 
 SYSTEMIC LESIONS                          |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Multiple Organs                         |    +  +  +  +  +           +  +  +  +  +                                 |  10        |
 __________________________________________________________________________________________________________________________________ 
                                                                                                                                    
                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                             Page   5                                                               
                                                                                                                                   
NTP Experiment-Test: 96007-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                             TOXIC EQUIVALENCY FACTOR EVALUATION (TCDD)                        Date: 11/25/02    
Route: GAVAGE                                                                                                     Time: 11:41:30    
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|                          |            |
                             DAY ON TEST   | 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9|                          |            |
                                           | 4| 4| 4| 4| 4| 5| 5| 5| 5| 5| 4| 4| 4| 4| 4| 5|                          |            |
 __________________________________________|__________________________________________________________________________|     T (*)  |
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|                          |     O      |
   SPRAGUE-DAWLEY RATS FEMALE              | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|                          |     T      |
                               ANIMAL ID   | 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2|                          |     A      |
    10 NG/KG                               | 2| 2| 2| 2| 3| 3| 4| 5| 6| 7| 7| 7| 7| 7| 8| 8|                          |     L      |
                                           | 6| 7| 8| 9| 0| 2| 3| 2| 9| 5| 6| 7| 8| 9| 0| 5|                          |            |
 _____________________________________________________________________________________________________________________|____________|
 ALIMENTARY SYSTEM                         |                                                                          |            |
                                           |__________________________________________________________________________|____________|
   Liver                                   | +  +  +  +  +                 +  +  +  +  +                              |  10        |
                                           |__________________________________________________________________________|____________|
   Pancreas                                | +  +  +  +  +                 +  +  +  +  +                              |  10        |
 _____________________________________________________________________________________________________________________|            |
 CARDIOVASCULAR SYSTEM                     |                                                                          |            |
    None                                   |                                                                          |            |
 _____________________________________________________________________________________________________________________|            |
 ENDOCRINE SYSTEM                          |                                                                          |            |
                                           |__________________________________________________________________________|____________|
   Adrenal Cortex                          | +  +  +  +  +                 +  +  +  +  +                              |  10        |
                                           |__________________________________________________________________________|____________|
   Thyroid Gland                           | +  +  +  +  +                 +  +  +  +  +                              |  10        |
 _____________________________________________________________________________________________________________________|            |
 GENERAL BODY SYSTEM                       |                                                                          |            |
    None                                   |                                                                          |            |
 _____________________________________________________________________________________________________________________|            |
 GENITAL SYSTEM                            |                                                                          |            |
    None                                   |                                                                          |            |
 _____________________________________________________________________________________________________________________|            |
 HEMATOPOIETIC SYSTEM                      |                                                                          |            |
                                           |__________________________________________________________________________|____________|
   Lymph Node                              | +                                +                                       |   2        |
                                           |__________________________________________________________________________|____________|
   Thymus                                  | +  +  +  +  +                 +  +  +  +  +                              |  10        |
 _____________________________________________________________________________________________________________________|            |
 INTEGUMENTARY SYSTEM                      |                                                                          |            |
    None                                   |                                                                          |            |
 _____________________________________________________________________________________________________________________|            |
 MUSCULOSKELETAL SYSTEM                    |                                                                          |            |
    None                                   |                                                                          |            |
 _____________________________________________________________________________________________________________________|            |
 NERVOUS SYSTEM                            |                                                                          |            |
    None                                   |                                                                          |            |
 _____________________________________________________________________________________________________________________|____________|
                                                                                                                                    
                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  
                                                                                                                                    
                                                             Page   6                                                               
                                                                                                                                   
NTP Experiment-Test: 96007-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                             TOXIC EQUIVALENCY FACTOR EVALUATION (TCDD)                        Date: 11/25/02    
Route: GAVAGE                                                                                                     Time: 11:41:30    
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|                          |            |
                             DAY ON TEST   | 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9|                          |            |
                                           | 4| 4| 4| 4| 4| 5| 5| 5| 5| 5| 4| 4| 4| 4| 4| 5|                          |            |
 __________________________________________|__________________________________________________________________________|     T (*)  |
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|                          |     O      |
   SPRAGUE-DAWLEY RATS FEMALE              | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|                          |     T      |
                               ANIMAL ID   | 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2| 2|                          |     A      |
    10 NG/KG                               | 2| 2| 2| 2| 3| 3| 4| 5| 6| 7| 7| 7| 7| 7| 8| 8|                          |     L      |
                                           | 6| 7| 8| 9| 0| 2| 3| 2| 9| 5| 6| 7| 8| 9| 0| 5|                          |            |
 _____________________________________________________________________________________________________________________|____________|
 RESPIRATORY SYSTEM                        |                                                                          |            |
                                           |__________________________________________________________________________|____________|
   Lung                                    | +  +  +  +  +                 +  +  +  +  +                              |  10        |
 _____________________________________________________________________________________________________________________|            |
 SPECIAL SENSES SYSTEM                     |                                                                          |            |
    None                                   |                                                                          |            |
 _____________________________________________________________________________________________________________________|            |
 URINARY SYSTEM                            |                                                                          |            |
    None                                   |                                                                          |            |
 _____________________________________________________________________________________________________________________|____________|
                                           |__________________________________________________________________________|____________|
 __________________________________________________________________________________________________________________________________ 
 SYSTEMIC LESIONS                          |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Multiple Organs                         | +  +  +  +  +                 +  +  +  +  +                              |  10        |
 __________________________________________________________________________________________________________________________________ 
                                                                                                                                    
                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                             Page   7                                                               
                                                                                                                                   
NTP Experiment-Test: 96007-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                             TOXIC EQUIVALENCY FACTOR EVALUATION (TCDD)                        Date: 11/25/02    
Route: GAVAGE                                                                                                     Time: 11:41:30    
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|                          |            |
                             DAY ON TEST   | 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9|                          |            |
                                           | 5| 5| 5| 4| 4| 4| 4| 4| 5| 5| 5| 4| 4| 4| 4| 4|                          |            |
 __________________________________________|__________________________________________________________________________|     T (*)  |
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|                          |     O      |
   SPRAGUE-DAWLEY RATS FEMALE              | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|                          |     T      |
                               ANIMAL ID   | 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3|                          |     A      |
    22 NG/KG                               | 1| 3| 4| 5| 5| 5| 5| 6| 7| 7| 8| 8| 8| 8| 8| 9|                          |     L      |
                                           | 0| 8| 7| 6| 7| 8| 9| 0| 7| 9| 5| 6| 7| 8| 9| 0|                          |            |
 _____________________________________________________________________________________________________________________|____________|
 ALIMENTARY SYSTEM                         |                                                                          |            |
                                           |__________________________________________________________________________|____________|
   Liver                                   |          +  +  +  +  +           +  +  +  +  +                           |  10        |
                                           |__________________________________________________________________________|____________|
   Pancreas                                |          +  +  +  +  +           +  +  +  +  +                           |  10        |
 _____________________________________________________________________________________________________________________|            |
 CARDIOVASCULAR SYSTEM                     |                                                                          |            |
    None                                   |                                                                          |            |
 _____________________________________________________________________________________________________________________|            |
 ENDOCRINE SYSTEM                          |                                                                          |            |
                                           |__________________________________________________________________________|____________|
   Adrenal Cortex                          |          +  +  +  +  +           +  +  +  +  +                           |  10        |
                                           |__________________________________________________________________________|____________|
   Thyroid Gland                           |          +  +  +  +  +           +  +  +  +  +                           |  10        |
 _____________________________________________________________________________________________________________________|            |
 GENERAL BODY SYSTEM                       |                                                                          |            |
    None                                   |                                                                          |            |
 _____________________________________________________________________________________________________________________|            |
 GENITAL SYSTEM                            |                                                                          |            |
    None                                   |                                                                          |            |
 _____________________________________________________________________________________________________________________|            |
 HEMATOPOIETIC SYSTEM                      |                                                                          |            |
                                           |__________________________________________________________________________|____________|
   Lymph Node                              |          +                                +  +                           |   3        |
                                           |__________________________________________________________________________|____________|
   Thymus                                  |          +  +  +  +  +           +  +  +  +  +                           |  10        |
 _____________________________________________________________________________________________________________________|            |
 INTEGUMENTARY SYSTEM                      |                                                                          |            |
    None                                   |                                                                          |            |
 _____________________________________________________________________________________________________________________|            |
 MUSCULOSKELETAL SYSTEM                    |                                                                          |            |
    None                                   |                                                                          |            |
 _____________________________________________________________________________________________________________________|            |
 NERVOUS SYSTEM                            |                                                                          |            |
    None                                   |                                                                          |            |
 _____________________________________________________________________________________________________________________|____________|
                                                                                                                                    
                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  
                                                                                                                                    
                                                             Page   8                                                               
                                                                                                                                   
NTP Experiment-Test: 96007-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                             TOXIC EQUIVALENCY FACTOR EVALUATION (TCDD)                        Date: 11/25/02    
Route: GAVAGE                                                                                                     Time: 11:41:30    
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|                          |            |
                             DAY ON TEST   | 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9|                          |            |
                                           | 5| 5| 5| 4| 4| 4| 4| 4| 5| 5| 5| 4| 4| 4| 4| 4|                          |            |
 __________________________________________|__________________________________________________________________________|     T (*)  |
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|                          |     O      |
   SPRAGUE-DAWLEY RATS FEMALE              | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|                          |     T      |
                               ANIMAL ID   | 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3| 3|                          |     A      |
    22 NG/KG                               | 1| 3| 4| 5| 5| 5| 5| 6| 7| 7| 8| 8| 8| 8| 8| 9|                          |     L      |
                                           | 0| 8| 7| 6| 7| 8| 9| 0| 7| 9| 5| 6| 7| 8| 9| 0|                          |            |
 _____________________________________________________________________________________________________________________|____________|
 RESPIRATORY SYSTEM                        |                                                                          |            |
                                           |__________________________________________________________________________|____________|
   Lung                                    |          +  +  +  +  +           +  +  +  +  +                           |  10        |
 _____________________________________________________________________________________________________________________|            |
 SPECIAL SENSES SYSTEM                     |                                                                          |            |
    None                                   |                                                                          |            |
 _____________________________________________________________________________________________________________________|            |
 URINARY SYSTEM                            |                                                                          |            |
    None                                   |                                                                          |            |
 _____________________________________________________________________________________________________________________|____________|
                                           |__________________________________________________________________________|____________|
 __________________________________________________________________________________________________________________________________ 
 SYSTEMIC LESIONS                          |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Multiple Organs                         |          +  +  +  +  +           +  +  +  +  +                           |  10        |
 __________________________________________________________________________________________________________________________________ 
                                                                                                                                    
                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                             Page   9                                                               
                                                                                                                                   
NTP Experiment-Test: 96007-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                             TOXIC EQUIVALENCY FACTOR EVALUATION (TCDD)                        Date: 11/25/02    
Route: GAVAGE                                                                                                     Time: 11:41:30    
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|                          |            |
                             DAY ON TEST   | 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9|                          |            |
                                           | 5| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 5| 5| 5| 5| 5|                          |            |
 __________________________________________|__________________________________________________________________________|     T (*)  |
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|                          |     O      |
   SPRAGUE-DAWLEY RATS FEMALE              | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|                          |     T      |
                               ANIMAL ID   | 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4|                          |     A      |
    46 NG/KG                               | 0| 2| 2| 2| 2| 2| 3| 3| 3| 3| 3| 5| 6| 6| 7| 8|                          |     L      |
                                           | 4| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 3| 1| 8| 3| 4|                          |            |
 _____________________________________________________________________________________________________________________|____________|
 ALIMENTARY SYSTEM                         |                                                                          |            |
                                           |__________________________________________________________________________|____________|
   Liver                                   |    +  +  +  +  +  +  +  +  +  +                                          |  10        |
                                           |__________________________________________________________________________|____________|
   Pancreas                                |    +  +  +  +  +  +  +  +  +  +                                          |  10        |
 _____________________________________________________________________________________________________________________|            |
 CARDIOVASCULAR SYSTEM                     |                                                                          |            |
    None                                   |                                                                          |            |
 _____________________________________________________________________________________________________________________|            |
 ENDOCRINE SYSTEM                          |                                                                          |            |
                                           |__________________________________________________________________________|____________|
   Adrenal Cortex                          |    +  +  +  +  +  +  +  +  +  +                                          |  10        |
                                           |__________________________________________________________________________|____________|
   Thyroid Gland                           |    +  +  +  +  +  +  +  +  +  +                                          |  10        |
 _____________________________________________________________________________________________________________________|            |
 GENERAL BODY SYSTEM                       |                                                                          |            |
    None                                   |                                                                          |            |
 _____________________________________________________________________________________________________________________|            |
 GENITAL SYSTEM                            |                                                                          |            |
    None                                   |                                                                          |            |
 _____________________________________________________________________________________________________________________|            |
 HEMATOPOIETIC SYSTEM                      |                                                                          |            |
                                           |__________________________________________________________________________|____________|
   Lymph Node                              |                   +  +                                                   |   2        |
                                           |__________________________________________________________________________|____________|
   Thymus                                  |    +  +  +  +  +  +  +  +  +  +                                          |  10        |
 _____________________________________________________________________________________________________________________|            |
 INTEGUMENTARY SYSTEM                      |                                                                          |            |
    None                                   |                                                                          |            |
 _____________________________________________________________________________________________________________________|            |
 MUSCULOSKELETAL SYSTEM                    |                                                                          |            |
    None                                   |                                                                          |            |
 _____________________________________________________________________________________________________________________|            |
 NERVOUS SYSTEM                            |                                                                          |            |
    None                                   |                                                                          |            |
 _____________________________________________________________________________________________________________________|____________|
                                                                                                                                    
                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  
                                                                                                                                    
                                                             Page  10                                                               
                                                                                                                                   
NTP Experiment-Test: 96007-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                             TOXIC EQUIVALENCY FACTOR EVALUATION (TCDD)                        Date: 11/25/02    
Route: GAVAGE                                                                                                     Time: 11:41:30    
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|                          |            |
                             DAY ON TEST   | 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9|                          |            |
                                           | 5| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 5| 5| 5| 5| 5|                          |            |
 __________________________________________|__________________________________________________________________________|     T (*)  |
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|                          |     O      |
   SPRAGUE-DAWLEY RATS FEMALE              | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|                          |     T      |
                               ANIMAL ID   | 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4| 4|                          |     A      |
    46 NG/KG                               | 0| 2| 2| 2| 2| 2| 3| 3| 3| 3| 3| 5| 6| 6| 7| 8|                          |     L      |
                                           | 4| 1| 2| 3| 4| 5| 1| 2| 3| 4| 5| 3| 1| 8| 3| 4|                          |            |
 _____________________________________________________________________________________________________________________|____________|
 RESPIRATORY SYSTEM                        |                                                                          |            |
                                           |__________________________________________________________________________|____________|
   Lung                                    |    +  +  +  +  +  +  +  +  +  +                                          |  10        |
 _____________________________________________________________________________________________________________________|            |
 SPECIAL SENSES SYSTEM                     |                                                                          |            |
    None                                   |                                                                          |            |
 _____________________________________________________________________________________________________________________|            |
 URINARY SYSTEM                            |                                                                          |            |
    None                                   |                                                                          |            |
 _____________________________________________________________________________________________________________________|____________|
                                           |__________________________________________________________________________|____________|
 __________________________________________________________________________________________________________________________________ 
 SYSTEMIC LESIONS                          |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Multiple Organs                         |    +  +  +  +  +  +  +  +  +  +                                          |  10        |
 __________________________________________________________________________________________________________________________________ 
                                                                                                                                    
                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                             Page  11                                                               
                                                                                                                                   
NTP Experiment-Test: 96007-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                             TOXIC EQUIVALENCY FACTOR EVALUATION (TCDD)                        Date: 11/25/02    
Route: GAVAGE                                                                                                     Time: 11:41:30    
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|                          |            |
                             DAY ON TEST   | 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9|                          |            |
                                           | 5| 4| 4| 4| 4| 4| 5| 5| 5| 4| 4| 4| 4| 4| 5| 5|                          |            |
 __________________________________________|__________________________________________________________________________|     T (*)  |
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|                          |     O      |
   SPRAGUE-DAWLEY RATS FEMALE              | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|                          |     T      |
                               ANIMAL ID   | 5| 5| 5| 5| 5| 5| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6|                          |     A      |
    100                                    | 8| 9| 9| 9| 9| 9| 0| 0| 1| 2| 2| 2| 2| 2| 3| 4|                          |     L      |
    NG/KG                                  | 2| 1| 2| 3| 4| 5| 5| 7| 0| 1| 2| 3| 4| 5| 9| 5|                          |            |
 _____________________________________________________________________________________________________________________|____________|
 ALIMENTARY SYSTEM                         |                                                                          |            |
                                           |__________________________________________________________________________|____________|
   Liver                                   |    +  +  +  +  +           +  +  +  +  +                                 |  10        |
                                           |__________________________________________________________________________|____________|
   Pancreas                                |    +  +  +  +  +           +  +  +  +  +                                 |  10        |
                                           |__________________________________________________________________________|____________|
   Stomach, Forestomach                    |    +  +  +  +  +           +  +  +  +  +                                 |  10        |
                                           |__________________________________________________________________________|____________|
   Stomach, Glandular                      |    +  +  +  +  +           +  +  +  +  +                                 |  10        |
 _____________________________________________________________________________________________________________________|            |
 CARDIOVASCULAR SYSTEM                     |                                                                          |            |
                                           |__________________________________________________________________________|____________|
   Blood Vessel                            |             +                                                            |   1        |
 _____________________________________________________________________________________________________________________|            |
 ENDOCRINE SYSTEM                          |                                                                          |            |
                                           |__________________________________________________________________________|____________|
   Adrenal Cortex                          |    +  +  +  +  +           +  +  +  +  +                                 |  10        |
                                           |__________________________________________________________________________|____________|
   Adrenal Medulla                         |    +  +  +  +  +           +  +  +  +  +                                 |  10        |
                                           |__________________________________________________________________________|____________|
   Islets, Pancreatic                      |    +  +  +  +  +           +  +  +  +  +                                 |  10        |
                                           |__________________________________________________________________________|____________|
   Pituitary Gland                         |    +  +  +  +  +           +  +  +  +  +                                 |  10        |
                                           |__________________________________________________________________________|____________|
   Thyroid Gland                           |    +  +  +  +  +           +  +  +  +  +                                 |  10        |
 _____________________________________________________________________________________________________________________|            |
 GENERAL BODY SYSTEM                       |                                                                          |            |
    None                                   |                                                                          |            |
 _____________________________________________________________________________________________________________________|            |
 GENITAL SYSTEM                            |                                                                          |            |
                                           |__________________________________________________________________________|____________|
   Ovary                                   |    +  +  +  +  +           +  +  +  +  +                                 |  10        |
                                           |__________________________________________________________________________|____________|
   Uterus                                  |    +  +  +  +  +           +  +  +  +  +                                 |  10        |
 _____________________________________________________________________________________________________________________|____________|
                                                                                                                                    
                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  
                                                                                                                                    
                                                                                                                                    
                                                             Page  12                                                               
                                                                                                                                   
NTP Experiment-Test: 96007-03                        NEOPLASMS BY INDIVIDUAL ANIMAL                               Report: PEIRPT04  
Study Type: CHRONIC                             TOXIC EQUIVALENCY FACTOR EVALUATION (TCDD)                        Date: 11/25/02    
Route: GAVAGE                                                                                                     Time: 11:41:30    
                                                                                                                                    
 __________________________________________________________________________________________________________________________________ 
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|                          |            |
                             DAY ON TEST   | 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9| 9|                          |            |
                                           | 5| 4| 4| 4| 4| 4| 5| 5| 5| 4| 4| 4| 4| 4| 5| 5|                          |            |
 __________________________________________|__________________________________________________________________________|     T (*)  |
                                           | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|                          |     O      |
   SPRAGUE-DAWLEY RATS FEMALE              | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|                          |     T      |
                               ANIMAL ID   | 5| 5| 5| 5| 5| 5| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6|                          |     A      |
    100                                    | 8| 9| 9| 9| 9| 9| 0| 0| 1| 2| 2| 2| 2| 2| 3| 4|                          |     L      |
    NG/KG                                  | 2| 1| 2| 3| 4| 5| 5| 7| 0| 1| 2| 3| 4| 5| 9| 5|                          |            |
 _____________________________________________________________________________________________________________________|____________|
 GENITAL SYSTEM - cont                     |                                                                          |            |
                                           |                                                                          |            |
                                           |__________________________________________________________________________|____________|
   Vagina                                  |    +  +  +  +  +           +  +  +  +  +                                 |  10        |
 _____________________________________________________________________________________________________________________|            |
 HEMATOPOIETIC SYSTEM                      |                                                                          |            |
                                           |__________________________________________________________________________|____________|
   Spleen                                  |    +  +  +  +  +           +  +  +  +  +                                 |  10        |
                                           |__________________________________________________________________________|____________|
   Thymus                                  |    +  +  +  +  +           +  +  +  +  +                                 |  10        |
 _____________________________________________________________________________________________________________________|            |
 INTEGUMENTARY SYSTEM                      |                                                                          |            |
                                           |__________________________________________________________________________|____________|
   Mammary Gland                           |    +  +  +  +  +           +  +  +  +  +                                 |  10        |
 _____________________________________________________________________________________________________________________|            |
 MUSCULOSKELETAL SYSTEM                    |                                                                          |            |
    None                                   |                                                                          |            |
 _____________________________________________________________________________________________________________________|            |
 NERVOUS SYSTEM                            |                                                                          |            |
    None                                   |                                                                          |            |
 _____________________________________________________________________________________________________________________|            |
 RESPIRATORY SYSTEM                        |                                                                          |            |
                                           |__________________________________________________________________________|____________|
   Lung                                    |    +  +  +  +  +           +  +  +  +  +                                 |  10        |
 _____________________________________________________________________________________________________________________|            |
 SPECIAL SENSES SYSTEM                     |                                                                          |            |
    None                                   |                                                                          |            |
 _____________________________________________________________________________________________________________________|            |
 URINARY SYSTEM                            |                                                                          |            |
    None                                   |                                                                          |            |
 _____________________________________________________________________________________________________________________|____________|
                                           |__________________________________________________________________________|____________|
 __________________________________________________________________________________________________________________________________ 
 SYSTEMIC LESIONS                          |                                                                          |            |
                                            __________________________________________________________________________|____________|
   Multiple Organs                         |    +  +  +  +  +           +  +  +  +  +                                 |  10        |
 __________________________________________________________________________________________________________________________________ 
                                                                                                                                    
                         * : Total animals with tissue examined microscopically; total animals with tumor                           
                         + : Tissue examined microscopically                      M : Missing tissue                                
                         X : Lesion present                                       A : Autolysis precludes evaluation                
                         I : Insufficient tissue                              BLANK : Not examined microscopically                  
                                                                                                                                    
                                                             Page  13                                                               
                                                                                                                                   
                                  ------------------------------------------------------------                                      
                                  ----------              END OF REPORT             ----------                                      
                                  ------------------------------------------------------------                                      
NTP is located at the National Institute of Environmental Health Sciences, part of the National Institutes of Health.