https://ntp.niehs.nih.gov/go/4518

TDMS Study 05184-06 Pathology Tables

NTP Experiment-Test: 05184-06  INCIDENCE RATES OF NEOPLASMS BY ANATOMIC SITE (SYSTEMIC LESIONS ABRIDGED) (a)      Report: PEIRPT05
Study Type: CHRONIC                                           GLUTARALDEHYDE                                      Date: 07/13/98
Route: RESPIRATORY EXPOSURE WHOLE BODY                                                                            Time: 08:36:10
                                                           CORE STUDY
       Facility:  Battelle Northwest
       Chemical CAS #:  111-30-8
       Lock Date:  07/01/97
       Cage Range:  All
       Reasons For Removal:    All
       Removal Date Range:     All
       Treatment Groups:       Include All
a  Number of animals examined microscopically at site and number of animals with lesion
                                                              Page   1
NTP Experiment-Test: 05184-06  INCIDENCE RATES OF NEOPLASMS BY ANATOMIC SITE (SYSTEMIC LESIONS ABRIDGED) (a)      Report: PEIRPT05
Study Type: CHRONIC                                           GLUTARALDEHYDE                                      Date: 07/13/98  
Route: RESPIRATORY EXPOSURE WHOLE BODY                                                                            Time: 08:36:10  
____________________________________________________________________________________________________________________________________
         B6C3F1 MICE FEMALE                        CONTROL      62.5 PPB     125 PPB      250 PPB                                   
____________________________________________________________________________________________________________________________________
DISPOSITION SUMMARY                                                                                                                 
  Animals Initially in Study                          50           50           50           50                                     
  Early Deaths                                                                                                                      
    Moribund Sacrifice                                11           10           10           12                                     
    Natural Death                                      5            3            4            6                                     
    Accidently Killed                                                            1                                                  
  Survivors                                                                                                                         
    Terminal Sacrifice                                34           37           35           32                                     
  Animals Examined Microscopically                    50           50           50           50                                     
____________________________________________________________________________________________________________________________________
 ALIMENTARY SYSTEM                                                                                                                  
   Gallbladder                                        (45)         (41)         (43)         (41)                                   
      Adenoma                                                                                 1 (2%)                                
      Hepatocholangiocarcinoma, Metastatic, Liver                                1 (2%)                                             
      Histiocytic Sarcoma                              1 (2%)                                                                       
   Intestine Large, Rectum                            (47)         (47)         (48)         (45)                                   
   Intestine Large, Cecum                             (47)         (47)         (47)         (46)                                   
      Leiomyosarcoma                                                                          1 (2%)                                
   Intestine Small, Duodenum                          (45)         (47)         (48)         (48)                                   
      Polyp Adenomatous                                                                       1 (2%)                                
   Intestine Small, Jejunum                           (46)         (47)         (47)         (45)                                   
      Carcinoma, Metastatic, Uterus                                              1 (2%)                                             
   Intestine Small, Ileum                             (46)         (48)         (47)         (46)                                   
      Polyp Adenomatous                                                                       1 (2%)                                
   Liver                                              (50)         (48)         (50)         (50)                                   
      Hemangiosarcoma                                               2 (4%)       1 (2%)       1 (2%)                                
      Hepatocellular Carcinoma                         3 (6%)       6 (13%)      5 (10%)      3 (6%)                                
      Hepatocellular Carcinoma, Multiple               1 (2%)       1 (2%)                    1 (2%)                                
      Hepatocellular Adenoma                           6 (12%)     11 (23%)      7 (14%)      3 (6%)                                
      Hepatocellular Adenoma, Multiple                 5 (10%)                                                                      
      Hepatocholangiocarcinoma                                                   1 (2%)                                             
      Histiocytic Sarcoma                                                        1 (2%)                                             
      Ito Cell Tumor Malignant                                                                1 (2%)                                
   Mesentery                                          (12)         (6)          (5)          (6)                                    
      Carcinoma, Metastatic, Uterus                                              1 (20%)                                            
      Histiocytic Sarcoma                                                        1 (20%)                                            
   Pancreas                                           (50)         (48)         (49)         (49)                                   
      Carcinoma, Metastatic, Uterus                                              1 (2%)                                             
      Histiocytic Sarcoma                                                        1 (2%)                                             
   Salivary Glands                                    (50)         (49)         (50)         (50)                                   
   Stomach, Forestomach                               (50)         (49)         (48)         (48)                                   
      Squamous Cell Carcinoma                                                    1 (2%)                                             
      Squamous Cell Papilloma                          1 (2%)       1 (2%)       1 (2%)                                             
NTP Experiment-Test: 05184-06  INCIDENCE RATES OF NEOPLASMS BY ANATOMIC SITE (SYSTEMIC LESIONS ABRIDGED) (a)      Report: PEIRPT05
Study Type: CHRONIC                                           GLUTARALDEHYDE                                      Date: 07/13/98  
Route: RESPIRATORY EXPOSURE WHOLE BODY                                                                            Time: 08:36:10  
____________________________________________________________________________________________________________________________________
         B6C3F1 MICE FEMALE                        CONTROL      62.5 PPB     125 PPB      250 PPB                                   
____________________________________________________________________________________________________________________________________
ALIMENTARY SYSTEM - cont                                                                                                            
   Stomach, Glandular                                 (50)         (48)         (48)         (48)                                   
____________________________________________________________________________________________________________________________________
 CARDIOVASCULAR SYSTEM                                                                                                              
   Heart                                              (50)         (49)         (50)         (50)                                   
____________________________________________________________________________________________________________________________________
 ENDOCRINE SYSTEM                                                                                                                   
   Adrenal Cortex                                     (50)         (49)         (49)         (50)                                   
      Carcinoma, Metastatic, Uterus                                              1 (2%)                                             
      Capsule, Adenoma                                              1 (2%)                                                          
      Capsule, Carcinoma                                            1 (2%)       1 (2%)                                             
   Adrenal Medulla                                    (50)         (49)         (48)         (49)                                   
      Pheochromocytoma Malignant                                    1 (2%)                                                          
      Pheochromocytoma Benign                          4 (8%)       1 (2%)       1 (2%)       2 (4%)                                
   Islets, Pancreatic                                 (50)         (48)         (49)         (49)                                   
      Adenoma                                                                    1 (2%)                                             
   Pituitary Gland                                    (49)         (49)         (49)         (50)                                   
      Pars Distalis, Adenoma                          20 (41%)     16 (33%)     20 (41%)     16 (32%)                               
      Pars Distalis, Carcinoma                         1 (2%)                                                                       
      Pars Intermedia, Adenoma                                      1 (2%)       1 (2%)                                             
   Thyroid Gland                                      (50)         (48)         (50)         (50)                                   
      Follicular Cell, Adenoma                         4 (8%)                    2 (4%)       3 (6%)                                
      Follicular Cell, Carcinoma                                                              1 (2%)                                
____________________________________________________________________________________________________________________________________
 GENERAL BODY SYSTEM                                                                                                                
   Peritoneum                                                                   (2)                                                 
      Carcinoma, Metastatic, Uterus                                              1 (50%)                                            
      Histiocytic Sarcoma                                                        1 (50%)                                            
____________________________________________________________________________________________________________________________________
 GENITAL SYSTEM                                                                                                                     
   Ovary                                              (49)         (47)         (49)         (50)                                   
      Carcinoma, Metastatic, Uterus                                              1 (2%)                                             
      Cystadenoma                                      1 (2%)       1 (2%)       1 (2%)       2 (4%)                                
      Hemangiosarcoma                                                            1 (2%)                                             
      Histiocytic Sarcoma                                                        1 (2%)                                             
      Luteoma                                          2 (4%)                                                                       
      Bilateral, Tubulostromal Adenoma                                           1 (2%)                                             
   Uterus                                             (50)         (48)         (49)         (49)                                   
      Adenoma                                                       1 (2%)                                                          
      Carcinoma                                                     1 (2%)       2 (4%)       2 (4%)                                
NTP Experiment-Test: 05184-06  INCIDENCE RATES OF NEOPLASMS BY ANATOMIC SITE (SYSTEMIC LESIONS ABRIDGED) (a)      Report: PEIRPT05
Study Type: CHRONIC                                           GLUTARALDEHYDE                                      Date: 07/13/98  
Route: RESPIRATORY EXPOSURE WHOLE BODY                                                                            Time: 08:36:10  
____________________________________________________________________________________________________________________________________
         B6C3F1 MICE FEMALE                        CONTROL      62.5 PPB     125 PPB      250 PPB                                   
____________________________________________________________________________________________________________________________________
GENITAL SYSTEM - cont                                                                                                               
      Granular Cell Tumor Benign                       1 (2%)                                                                       
      Hemangioma                                                    1 (2%)                                                          
      Leiomyoma                                                                  2 (4%)       1 (2%)                                
      Polyp Stromal                                    3 (6%)       4 (8%)       3 (6%)                                             
____________________________________________________________________________________________________________________________________
 HEMATOPOIETIC SYSTEM                                                                                                               
   Bone Marrow                                        (50)         (48)         (50)         (49)                                   
      Hemangiosarcoma                                  1 (2%)       3 (6%)       1 (2%)                                             
   Lymph Node                                         (7)          (4)          (3)          (1)                                    
      Pancreatic, Histiocytic Sarcoma                  1 (14%)                                                                      
   Lymph Node, Bronchial                              (29)         (32)         (37)         (36)                                   
      Histiocytic Sarcoma                              1 (3%)                    1 (3%)                                             
   Lymph Node, Mandibular                             (43)         (40)         (39)         (38)                                   
      Hemangiosarcoma                                               1 (3%)                                                          
   Lymph Node, Mesenteric                             (47)         (48)         (46)         (46)                                   
      Histiocytic Sarcoma                              1 (2%)                                 1 (2%)                                
   Lymph Node, Mediastinal                            (31)         (23)         (34)         (37)                                   
      Alveolar/Bronchiolar Carcinoma, Metastatic,                                                                                   
           Lung                                                     1 (4%)                                                          
      Carcinoma, Metastatic, Uncertain Primary Site    1 (3%)                                                                       
      Histiocytic Sarcoma                                                        1 (3%)                                             
   Spleen                                             (50)         (48)         (48)         (49)                                   
      Hemangiosarcoma                                  1 (2%)       3 (6%)       1 (2%)       1 (2%)                                
      Histiocytic Sarcoma                                                        1 (2%)                                             
   Thymus                                             (45)         (44)         (39)         (47)                                   
      Carcinoma, Metastatic, Uncertain Primary Site    1 (2%)                                                                       
____________________________________________________________________________________________________________________________________
 INTEGUMENTARY SYSTEM                                                                                                               
   Mammary Gland                                      (49)         (49)         (50)         (49)                                   
      Carcinoma                                        3 (6%)                    3 (6%)                                             
   Skin                                               (50)         (50)         (50)         (50)                                   
      Subcutaneous Tissue, Fibrosarcoma                1 (2%)       1 (2%)       3 (6%)                                             
      Subcutaneous Tissue, Hemangiosarcoma             1 (2%)       1 (2%)       1 (2%)                                             
      Subcutaneous Tissue, Sarcoma                                                            3 (6%)                                
      Subcutaneous Tissue, Sarcoma, Multiple           2 (4%)                                                                       
____________________________________________________________________________________________________________________________________
 MUSCULOSKELETAL SYSTEM                                                                                                             
   Bone                                               (50)         (49)         (50)         (50)                                   
      Hemangiosarcoma                                               1 (2%)                                                          
   Skeletal Muscle                                    (2)          (1)                                                              
      Hemangiosarcoma                                               1 (100%)                                                        
NTP Experiment-Test: 05184-06  INCIDENCE RATES OF NEOPLASMS BY ANATOMIC SITE (SYSTEMIC LESIONS ABRIDGED) (a)      Report: PEIRPT05
Study Type: CHRONIC                                           GLUTARALDEHYDE                                      Date: 07/13/98  
Route: RESPIRATORY EXPOSURE WHOLE BODY                                                                            Time: 08:36:10  
____________________________________________________________________________________________________________________________________
         B6C3F1 MICE FEMALE                        CONTROL      62.5 PPB     125 PPB      250 PPB                                   
____________________________________________________________________________________________________________________________________
____________________________________________________________________________________________________________________________________
 NERVOUS SYSTEM                                                                                                                     
   Brain                                              (50)         (49)         (50)         (50)                                   
      Carcinoma, Metastatic, Pituitary Gland           1 (2%)                                                                       
____________________________________________________________________________________________________________________________________
 RESPIRATORY SYSTEM                                                                                                                 
   Larynx                                             (50)         (49)         (50)         (48)                                   
   Lung                                               (50)         (49)         (50)         (50)                                   
      Alveolar/Bronchiolar Adenoma                     2 (4%)       3 (6%)       2 (4%)       2 (4%)                                
      Alveolar/Bronchiolar Adenoma, Multiple                        1 (2%)                                                          
      Alveolar/Bronchiolar Carcinoma                   1 (2%)       4 (8%)       5 (10%)      2 (4%)                                
      Carcinoma, Metastatic, Uncertain Primary Site    1 (2%)                                                                       
      Carcinoma, Metastatic, Uterus                                              1 (2%)                                             
      Hepatocellular Carcinoma, Metastatic, Liver      2 (4%)       5 (10%)      1 (2%)       2 (4%)                                
      Hepatocholangiocarcinoma, Metastatic, Liver                                1 (2%)                                             
      Histiocytic Sarcoma                                                        1 (2%)                                             
      Leiomyosarcoma, Metastatic, Intestine Large,                                                                                  
           Cecum                                                                              1 (2%)                                
      Osteosarcoma, Metastatic, Uncertain Primary                                                                                   
          Site                                                      1 (2%)                                                          
   Nose                                               (50)         (49)         (50)         (50)                                   
   Pleura                                             (1)          (1)          (1)                                                 
      Alveolar/Bronchiolar Carcinoma, Metastatic,                                                                                   
           Lung                                                     1 (100%)     1 (100%)                                           
      Carcinoma, Metastatic, Uncertain Primary Site    1 (100%)                                                                     
____________________________________________________________________________________________________________________________________
 SPECIAL SENSES SYSTEM                                                                                                              
   Harderian Gland                                    (3)                       (1)          (2)                                    
      Adenoma                                          1 (33%)                                                                      
      Carcinoma                                        2 (67%)                                1 (50%)                               
____________________________________________________________________________________________________________________________________
 URINARY SYSTEM                                                                                                                     
   Kidney                                             (50)         (49)         (49)         (49)                                   
      Hepatocholangiocarcinoma, Metastatic, Liver                                1 (2%)                                             
      Histiocytic Sarcoma                                                        1 (2%)                                             
      Capsule, Sarcoma                                 1 (2%)                                                                       
   Urinary Bladder                                    (48)         (48)         (48)         (47)                                   
      Carcinoma, Metastatic, Uterus                                              1 (2%)                                             
      Histiocytic Sarcoma                                                        1 (2%)                                             
NTP Experiment-Test: 05184-06  INCIDENCE RATES OF NEOPLASMS BY ANATOMIC SITE (SYSTEMIC LESIONS ABRIDGED) (a)      Report: PEIRPT05
Study Type: CHRONIC                                           GLUTARALDEHYDE                                      Date: 07/13/98  
Route: RESPIRATORY EXPOSURE WHOLE BODY                                                                            Time: 08:36:10  
____________________________________________________________________________________________________________________________________
         B6C3F1 MICE FEMALE                        CONTROL      62.5 PPB     125 PPB      250 PPB                                   
____________________________________________________________________________________________________________________________________
 SYSTEMIC LESIONS                                                                                                                   
   Multiple Organs                                   *(50)        *(50)        *(50)        *(50)                                   
      Histiocytic Sarcoma                              1 (2%)                    1 (2%)       1 (2%)                                
      Lymphoma Malignant                              12 (24%)     12 (24%)      8 (16%)     12 (24%)                               
____________________________________________________________________________________________________________________________________
     *   Number of animals with any tissue examined microscopically                                                                 
                                                             Page   6                                                               
NTP Experiment-Test: 05184-06  INCIDENCE RATES OF NEOPLASMS BY ANATOMIC SITE (SYSTEMIC LESIONS ABRIDGED) (a)      Report: PEIRPT05
Study Type: CHRONIC                                           GLUTARALDEHYDE                                      Date: 07/13/98  
Route: RESPIRATORY EXPOSURE WHOLE BODY                                                                            Time: 08:36:10  
____________________________________________________________________________________________________________________________________
         B6C3F1 MICE FEMALE                        CONTROL      62.5 PPB     125 PPB      250 PPB                                   
____________________________________________________________________________________________________________________________________
TUMOR SUMMARY                                                                                                                       
   Total Animals with Primary Neoplasms (b)            41          44          41          40                                       
     Total Primary Neoplasms                           81          81          77          62                                       
   Total Animals with Benign Neoplasms                 32          32          30          26                                       
     Total Benign Neoplasms                            50          42          42          32                                       
   Total Animals with Malignant Neoplasms              24          26          24          25                                       
     Total Malignant Neoplasms                         31          39          35          30                                       
   Total Animals with Metastatic Neoplasms              3           6           4           3                                       
     Total Metastatic Neoplasm                          7           8          13           3                                       
   Total Animals with Malignant Neoplasms               1           1                                                               
   Uncertain Primary Site                                                                                                           
   Total Animals with Neoplasms Uncertain-                                                                                          
   Benign or Malignant                                                                                                              
     Total Uncertain Neoplasms                                                                                                      
____________________________________________________________________________________________________________________________________
a  Number of animals examined microscopically at site and number of animals with lesion                                             
b  Primary tumors: all tumors except metastatic tumors                                                                              
NTP Experiment-Test: 05184-06  INCIDENCE RATES OF NEOPLASMS BY ANATOMIC SITE (SYSTEMIC LESIONS ABRIDGED) (a)      Report: PEIRPT05
Study Type: CHRONIC                                           GLUTARALDEHYDE                                      Date: 07/13/98  
Route: RESPIRATORY EXPOSURE WHOLE BODY                                                                            Time: 08:36:10  
____________________________________________________________________________________________________________________________________
         B6C3F1 MICE MALE                          CONTROL      62.5 PPB     125 PPB      250 PPB                                   
____________________________________________________________________________________________________________________________________
DISPOSITION SUMMARY                                                                                                                 
  Animals Initially in Study                          50           50           50           50                                     
  Early Deaths                                                                                                                      
    Moribund Sacrifice                                13           15            6            5                                     
    Natural Death                                      6            8            4            7                                     
  Survivors                                                                                                                         
    Terminal Sacrifice                                31           27           40           38                                     
  Animals Examined Microscopically                    50           50           50           50                                     
____________________________________________________________________________________________________________________________________
 ALIMENTARY SYSTEM                                                                                                                  
   Gallbladder                                        (42)         (36)         (41)         (46)                                   
      Sarcoma, Metastatic, Mesentery                                             1 (2%)                                             
   Intestine Large, Cecum                             (45)         (44)         (48)         (47)                                   
   Intestine Small, Duodenum                          (43)         (43)         (47)         (46)                                   
      Carcinoma                                                                  1 (2%)                                             
   Intestine Small, Jejunum                           (43)         (44)         (47)         (46)                                   
   Intestine Small, Ileum                             (44)         (46)         (48)         (47)                                   
   Liver                                              (49)         (50)         (50)         (49)                                   
      Hemangiosarcoma                                  2 (4%)                    3 (6%)       2 (4%)                                
      Hepatocellular Carcinoma                        15 (31%)      9 (18%)     10 (20%)     10 (20%)                               
      Hepatocellular Carcinoma, Multiple                            6 (12%)      2 (4%)       2 (4%)                                
      Hepatocellular Adenoma                          15 (31%)      7 (14%)     16 (32%)      9 (18%)                               
      Hepatocellular Adenoma, Multiple                 4 (8%)       3 (6%)       4 (8%)       2 (4%)                                
      Hepatocholangiocarcinoma                                      1 (2%)                    1 (2%)                                
      Histiocytic Sarcoma                              3 (6%)                                                                       
   Mesentery                                          (2)          (2)          (3)          (5)                                    
      Sarcoma                                                                    1 (33%)                                            
   Pancreas                                           (47)         (49)         (50)         (48)                                   
      Sarcoma, Metastatic, Mesentery                                             1 (2%)                                             
   Stomach, Forestomach                               (48)         (49)         (50)         (48)                                   
      Sarcoma, Metastatic, Mesentery                                             1 (2%)                                             
      Squamous Cell Carcinoma                                       1 (2%)                                                          
      Squamous Cell Papilloma                                       1 (2%)                                                          
   Stomach, Glandular                                 (46)         (47)         (50)         (48)                                   
   Tooth                                              (13)         (17)         (10)         (19)                                   
      Odontoma                                         1 (8%)                                                                       
____________________________________________________________________________________________________________________________________
NTP Experiment-Test: 05184-06  INCIDENCE RATES OF NEOPLASMS BY ANATOMIC SITE (SYSTEMIC LESIONS ABRIDGED) (a)      Report: PEIRPT05
Study Type: CHRONIC                                           GLUTARALDEHYDE                                      Date: 07/13/98  
Route: RESPIRATORY EXPOSURE WHOLE BODY                                                                            Time: 08:36:10  
____________________________________________________________________________________________________________________________________
         B6C3F1 MICE MALE                          CONTROL      62.5 PPB     125 PPB      250 PPB                                   
____________________________________________________________________________________________________________________________________
 CARDIOVASCULAR SYSTEM                                                                                                              
   Heart                                              (49)         (50)         (50)         (49)                                   
      Hemangiosarcoma                                                                         1 (2%)                                
      Hepatocholangiocarcinoma, Metastatic, Liver                   1 (2%)                                                          
      Sarcoma, Metastatic, Mesentery                                             1 (2%)                                             
____________________________________________________________________________________________________________________________________
 ENDOCRINE SYSTEM                                                                                                                   
   Adrenal Cortex                                     (47)         (49)         (50)         (49)                                   
      Capsule, Adenoma                                 2 (4%)                    3 (6%)       1 (2%)                                
   Pituitary Gland                                    (46)         (47)         (48)         (47)                                   
      Pars Distalis, Adenoma                           1 (2%)                                                                       
      Pars Intermedia, Adenoma                         1 (2%)                                                                       
   Thyroid Gland                                      (48)         (49)         (49)         (49)                                   
      Bilateral, Follicular Cell, Adenoma              1 (2%)                                                                       
      Follicular Cell, Adenoma                                      3 (6%)       2 (4%)       1 (2%)                                
      Follicular Cell, Carcinoma                       1 (2%)                                                                       
____________________________________________________________________________________________________________________________________
 GENERAL BODY SYSTEM                                                                                                                
   None                                                                                                                             
____________________________________________________________________________________________________________________________________
 GENITAL SYSTEM                                                                                                                     
   Epididymis                                         (48)         (50)         (50)         (49)                                   
      Histiocytic Sarcoma                              1 (2%)       1 (2%)                                                          
   Preputial Gland                                    (48)         (49)         (50)         (47)                                   
      Squamous Cell Carcinoma                                       1 (2%)                                                          
   Prostate                                           (49)         (48)         (50)         (47)                                   
   Seminal Vesicle                                    (47)         (49)         (50)         (49)                                   
      Granular Cell Tumor Benign                                                 1 (2%)                                             
   Testes                                             (48)         (50)         (50)         (50)                                   
      Interstitial Cell, Adenoma                                    1 (2%)       2 (4%)       2 (4%)                                
____________________________________________________________________________________________________________________________________
 HEMATOPOIETIC SYSTEM                                                                                                               
   Bone Marrow                                        (48)         (47)         (50)         (49)                                   
      Hemangiosarcoma                                  1 (2%)       1 (2%)                    1 (2%)                                
      Mast Cell Tumor Malignant                                                  1 (2%)                                             
   Lymph Node                                         (1)          (2)          (1)          (1)                                    
   Lymph Node, Bronchial                              (34)         (28)         (35)         (37)                                   
      Alveolar/Bronchiolar Carcinoma, Metastatic,                                                                                   
           Lung                                                                  1 (3%)                                             
NTP Experiment-Test: 05184-06  INCIDENCE RATES OF NEOPLASMS BY ANATOMIC SITE (SYSTEMIC LESIONS ABRIDGED) (a)      Report: PEIRPT05
Study Type: CHRONIC                                           GLUTARALDEHYDE                                      Date: 07/13/98  
Route: RESPIRATORY EXPOSURE WHOLE BODY                                                                            Time: 08:36:10  
____________________________________________________________________________________________________________________________________
         B6C3F1 MICE MALE                          CONTROL      62.5 PPB     125 PPB      250 PPB                                   
____________________________________________________________________________________________________________________________________
HEMATOPOIETIC SYSTEM - cont                                                                                                         
      Histiocytic Sarcoma                              1 (3%)                                                                       
   Lymph Node, Mandibular                             (36)         (22)         (30)         (33)                                   
   Lymph Node, Mesenteric                             (46)         (44)         (47)         (47)                                   
      Sarcoma, Metastatic, Mesentery                                             1 (2%)                                             
   Lymph Node, Mediastinal                            (29)         (27)         (33)         (30)                                   
      Histiocytic Sarcoma                              1 (3%)                                                                       
   Spleen                                             (48)         (48)         (50)         (48)                                   
      Hemangiosarcoma                                  1 (2%)       1 (2%)       1 (2%)       1 (2%)                                
      Histiocytic Sarcoma                                           1 (2%)                                                          
   Thymus                                             (39)         (34)         (43)         (44)                                   
____________________________________________________________________________________________________________________________________
 INTEGUMENTARY SYSTEM                                                                                                               
   Skin                                               (48)         (50)         (50)         (48)                                   
      Subcutaneous Tissue, Fibrosarcoma                1 (2%)       1 (2%)                                                          
      Subcutaneous Tissue, Sarcoma                                  1 (2%)                                                          
____________________________________________________________________________________________________________________________________
 MUSCULOSKELETAL SYSTEM                                                                                                             
   Skeletal Muscle                                                 (1)                                                              
      Hepatocholangiocarcinoma, Metastatic, Liver                   1 (100%)                                                        
____________________________________________________________________________________________________________________________________
 NERVOUS SYSTEM                                                                                                                     
   None                                                                                                                             
____________________________________________________________________________________________________________________________________
 RESPIRATORY SYSTEM                                                                                                                 
   Lung                                               (48)         (50)         (50)         (50)                                   
      Alveolar/Bronchiolar Adenoma                     8 (17%)     10 (20%)      9 (18%)      6 (12%)                               
      Alveolar/Bronchiolar Adenoma, Multiple                                                  1 (2%)                                
      Alveolar/Bronchiolar Carcinoma                   9 (19%)      6 (12%)      7 (14%)      6 (12%)                               
      Alveolar/Bronchiolar Carcinoma, Multiple         1 (2%)                                 1 (2%)                                
      Hepatocellular Carcinoma, Metastatic, Liver      6 (13%)      2 (4%)       6 (12%)      4 (8%)                                
      Hepatocholangiocarcinoma, Metastatic, Liver                   1 (2%)                                                          
      Histiocytic Sarcoma                              2 (4%)                                                                       
      Mediastinum, Alveolar/Bronchiolar Carcinoma,                                                                                  
           Metastatic, Lung                                                                   1 (2%)                                
   Pleura                                                          (1)                       (2)                                    
      Alveolar/Bronchiolar Carcinoma, Metastatic,                                                                                   
           Lung                                                     1 (100%)                  1 (50%)                               
____________________________________________________________________________________________________________________________________
NTP Experiment-Test: 05184-06  INCIDENCE RATES OF NEOPLASMS BY ANATOMIC SITE (SYSTEMIC LESIONS ABRIDGED) (a)      Report: PEIRPT05
Study Type: CHRONIC                                           GLUTARALDEHYDE                                      Date: 07/13/98  
Route: RESPIRATORY EXPOSURE WHOLE BODY                                                                            Time: 08:36:10  
____________________________________________________________________________________________________________________________________
         B6C3F1 MICE MALE                          CONTROL      62.5 PPB     125 PPB      250 PPB                                   
____________________________________________________________________________________________________________________________________
 SPECIAL SENSES SYSTEM                                                                                                              
   Harderian Gland                                    (4)          (5)          (2)          (2)                                    
      Adenoma                                          3 (75%)      3 (60%)      2 (100%)     1 (50%)                               
      Carcinoma                                        1 (25%)      2 (40%)                   1 (50%)                               
____________________________________________________________________________________________________________________________________
 URINARY SYSTEM                                                                                                                     
   Kidney                                             (48)         (49)         (50)         (49)                                   
      Alveolar/Bronchiolar Carcinoma, Metastatic,                                                                                   
           Lung                                                                  1 (2%)                                             
      Hepatocholangiocarcinoma, Metastatic, Liver                   1 (2%)                                                          
      Histiocytic Sarcoma                              1 (2%)                                                                       
      Mast Cell Tumor Malignant, Metastatic, Bone                                                                                   
          Marrow                                                                 1 (2%)                                             
____________________________________________________________________________________________________________________________________
 SYSTEMIC LESIONS                                                                                                                   
   Multiple Organs                                   *(50)        *(50)        *(50)        *(50)                                   
      Histiocytic Sarcoma                              3 (6%)       1 (2%)                                                          
      Lymphoma Malignant                               4 (8%)       5 (10%)      1 (2%)       5 (10%)                               
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     *   Number of animals with any tissue examined microscopically                                                                 
                                                             Page  11                                                               
NTP Experiment-Test: 05184-06  INCIDENCE RATES OF NEOPLASMS BY ANATOMIC SITE (SYSTEMIC LESIONS ABRIDGED) (a)      Report: PEIRPT05
Study Type: CHRONIC                                           GLUTARALDEHYDE                                      Date: 07/13/98  
Route: RESPIRATORY EXPOSURE WHOLE BODY                                                                            Time: 08:36:10  
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         B6C3F1 MICE MALE                          CONTROL      62.5 PPB     125 PPB      250 PPB                                   
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TUMOR SUMMARY                                                                                                                       
   Total Animals with Primary Neoplasms (b)            44          42          39          33                                       
     Total Primary Neoplasms                           75          64          66          54                                       
   Total Animals with Benign Neoplasms                 27          24          29          19                                       
     Total Benign Neoplasms                            36          28          39          23                                       
   Total Animals with Malignant Neoplasms              33          28          23          22                                       
     Total Malignant Neoplasms                         39          36          27          31                                       
   Total Animals with Metastatic Neoplasms              6           4           8           5                                       
     Total Metastatic Neoplasm                          6           7          14           6                                       
   Total Animals with Malignant Neoplasms                                                                                           
   Uncertain Primary Site                                                                                                           
   Total Animals with Neoplasms Uncertain-                                                                                          
   Benign or Malignant                                                                                                              
     Total Uncertain Neoplasms                                                                                                      
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a  Number of animals examined microscopically at site and number of animals with lesion                                             
b  Primary tumors: all tumors except metastatic tumors                                                                              
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                             ----------              END OF REPORT             ----------                                           
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