TDMS Study 05211-06 Pathology Tables
NTP Experiment-Test: 05211-06 INCIDENCE RATES OF NEOPLASMS BY ANATOMIC SITE (SYSTEMIC LESIONS ABRIDGED) (a) Report: PEIRPT05 Study Type: CHRONIC EMODIN Date: 12/02/98 Route: DOSED FEED Time: 10:33:41 CORE STUDY MICE Facility: Southern Research Institute Chemical CAS #: 518-82-1 Lock Date: 07/30/97 Cage Range: All Reasons For Removal: 25022 Accidently Killed 25019 Moribund Sacrifice 25020 Natural Death 25021 Terminal Sacrifice 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: 05211-06 INCIDENCE RATES OF NEOPLASMS BY ANATOMIC SITE (SYSTEMIC LESIONS ABRIDGED) (a) Report: PEIRPT05 Study Type: CHRONIC EMODIN Date: 12/02/98 Route: DOSED FEED Time: 10:33:41 ____________________________________________________________________________________________________________________________________ B6C3F1 MICE FEMALE 0 312 625 1250 PPM PPM PPM PPM ____________________________________________________________________________________________________________________________________ DISPOSITION SUMMARY Animals Initially in Study 60 60 60 60 Early Deaths Moribund Sacrifice 7 9 2 7 Natural Death 6 2 7 7 Accidently Killed 1 Survivors Terminal Sacrifice 37 39 40 36 Animals Examined Microscopically 50 50 50 50 ____________________________________________________________________________________________________________________________________ ALIMENTARY SYSTEM Gallbladder (47) (49) (48) (48) Leiomyosarcoma, Metastatic, Uterus 1 (2%) Intestine Large, Rectum (47) (49) (48) (47) Intestine Large, Cecum (47) (49) (47) (45) Leiomyosarcoma 1 (2%) Intestine Small, Jejunum (45) (48) (45) (46) Leiomyosarcoma 1 (2%) Intestine Small, Ileum (48) (49) (47) (46) Liver (50) (50) (50) (50) Hemangiosarcoma 1 (2%) Hepatocellular Carcinoma 3 (6%) 6 (12%) 8 (16%) 1 (2%) Hepatocellular Carcinoma, Multiple 1 (2%) 1 (2%) 1 (2%) 3 (6%) Hepatocellular Adenoma 8 (16%) 6 (12%) 10 (20%) 7 (14%) Hepatocellular Adenoma, Multiple 1 (2%) 1 (2%) 2 (4%) Histiocytic Sarcoma 1 (2%) 2 (4%) 4 (8%) 2 (4%) Leiomyosarcoma, Metastatic, Uterus 1 (2%) Mesentery (14) (16) (15) (11) Hemangiosarcoma 1 (7%) 1 (7%) 1 (9%) Histiocytic Sarcoma 1 (7%) 2 (13%) 1 (7%) 1 (9%) Leiomyosarcoma, Metastatic, Uterus 1 (7%) Leiomyosarcoma, Metastatic, Intestine Small, Jejunum 1 (9%) Sarcoma 1 (7%) Squamous Cell Carcinoma, Metastatic, Stomach, Forestomach 1 (7%) Pancreas (48) (49) (49) (48) Acinus, Adenoma 1 (2%) Salivary Glands (50) (50) (50) (49) Histiocytic Sarcoma 1 (2%) Stomach, Forestomach (50) (49) (48) (49) Squamous Cell Carcinoma 1 (2%) Squamous Cell Papilloma 1 (2%) NTP Experiment-Test: 05211-06 INCIDENCE RATES OF NEOPLASMS BY ANATOMIC SITE (SYSTEMIC LESIONS ABRIDGED) (a) Report: PEIRPT05 Study Type: CHRONIC EMODIN Date: 12/02/98 Route: DOSED FEED Time: 10:33:41 ____________________________________________________________________________________________________________________________________ B6C3F1 MICE FEMALE 0 312 625 1250 PPM PPM PPM PPM ____________________________________________________________________________________________________________________________________ ALIMENTARY SYSTEM - cont Stomach, Glandular (50) (49) (48) (48) Tooth (2) Adamantinoma Malignant 1 (50%) ____________________________________________________________________________________________________________________________________ CARDIOVASCULAR SYSTEM Heart (50) (50) (50) (50) Rhabdomyosarcoma 1 (2%) ____________________________________________________________________________________________________________________________________ ENDOCRINE SYSTEM Adrenal Cortex (50) (50) (50) (50) Adenoma 1 (2%) Histiocytic Sarcoma 1 (2%) Capsule, Adenoma 1 (2%) Adrenal Medulla (50) (50) (50) (50) Pheochromocytoma Malignant 1 (2%) Pituitary Gland (46) (45) (46) (44) Pars Distalis, Adenoma 4 (9%) 4 (9%) 9 (20%) 8 (18%) Pars Intermedia, Adenoma 1 (2%) Pars Intermedia, Carcinoma 1 (2%) Thyroid Gland (50) (50) (50) (48) C-Cell, Adenoma 1 (2%) Follicular Cell, Adenoma 2 (4%) 5 (10%) 2 (4%) 2 (4%) Follicular Cell, Adenoma, Multiple 1 (2%) ____________________________________________________________________________________________________________________________________ GENERAL BODY SYSTEM Peritoneum (2) Sarcoma, Metastatic, Mesentery 1 (50%) Tissue NOS (2) (3) (1) Abdominal, Leiomyosarcoma, Metastatic, Intestine Small, Jejunum 1 (100%) Abdominal, Rhabdomyosarcoma, Metastatic, Heart 1 (33%) Abdominal, Schwannoma Malignant 1 (33%) Pelvic, Fibrosarcoma 1 (50%) Thoracic, Rhabdomyosarcoma 1 (50%) 1 (33%) ____________________________________________________________________________________________________________________________________ NTP Experiment-Test: 05211-06 INCIDENCE RATES OF NEOPLASMS BY ANATOMIC SITE (SYSTEMIC LESIONS ABRIDGED) (a) Report: PEIRPT05 Study Type: CHRONIC EMODIN Date: 12/02/98 Route: DOSED FEED Time: 10:33:41 ____________________________________________________________________________________________________________________________________ B6C3F1 MICE FEMALE 0 312 625 1250 PPM PPM PPM PPM ____________________________________________________________________________________________________________________________________ GENITAL SYSTEM Ovary (45) (44) (48) (48) Cystadenoma 1 (2%) 2 (5%) 2 (4%) 1 (2%) Histiocytic Sarcoma 2 (5%) Leiomyosarcoma, Metastatic, Uterus 1 (2%) Luteoma 1 (2%) Oviduct (1) (1) (1) Uterus (50) (50) (49) (50) Hemangioma 1 (2%) Hemangiosarcoma 1 (2%) Histiocytic Sarcoma 1 (2%) 2 (4%) 2 (4%) 1 (2%) Leiomyoma 1 (2%) Leiomyosarcoma 1 (2%) Endometrium, Polyp Stromal 2 (4%) 2 (4%) 2 (4%) 2 (4%) Vagina (1) Histiocytic Sarcoma 1 (100%) ____________________________________________________________________________________________________________________________________ HEMATOPOIETIC SYSTEM Bone Marrow (48) (50) (49) (50) Hemangiosarcoma 1 (2%) Histiocytic Sarcoma 1 (2%) 1 (2%) 1 (2%) Lymph Node (8) (7) (9) (7) Histiocytic Sarcoma 1 (14%) Axillary, Histiocytic Sarcoma 1 (14%) Bronchial, Histiocytic Sarcoma 1 (14%) Deep Cervical, Histiocytic Sarcoma 1 (14%) Iliac, Histiocytic Sarcoma 1 (14%) 2 (22%) Inguinal, Histiocytic Sarcoma 1 (14%) Mediastinal, Histiocytic Sarcoma 1 (14%) 1 (11%) 1 (14%) Mediastinal, Leiomyosarcoma, Metastatic, Uterus 1 (13%) Mediastinal, Sarcoma, Metastatic, Peritoneum 1 (13%) Pancreatic, Histiocytic Sarcoma 1 (14%) 1 (11%) Popliteal, Histiocytic Sarcoma 1 (14%) Renal, Histiocytic Sarcoma 1 (11%) 1 (14%) Lymph Node, Mandibular (48) (46) (47) (47) Histiocytic Sarcoma 2 (4%) 1 (2%) Lymph Node, Mesenteric (49) (48) (50) (49) Hemangiosarcoma 1 (2%) Histiocytic Sarcoma 2 (4%) 4 (8%) 1 (2%) Rhabdomyosarcoma, Metastatic, Heart 1 (2%) Spleen (48) (49) (49) (49) Hemangiosarcoma 1 (2%) 1 (2%) Histiocytic Sarcoma 2 (4%) 2 (4%) 1 (2%) Thymus (49) (49) (46) (48) NTP Experiment-Test: 05211-06 INCIDENCE RATES OF NEOPLASMS BY ANATOMIC SITE (SYSTEMIC LESIONS ABRIDGED) (a) Report: PEIRPT05 Study Type: CHRONIC EMODIN Date: 12/02/98 Route: DOSED FEED Time: 10:33:41 ____________________________________________________________________________________________________________________________________ B6C3F1 MICE FEMALE 0 312 625 1250 PPM PPM PPM PPM ____________________________________________________________________________________________________________________________________ HEMATOPOIETIC SYSTEM - cont Histiocytic Sarcoma 1 (2%) 1 (2%) ____________________________________________________________________________________________________________________________________ INTEGUMENTARY SYSTEM Mammary Gland (49) (50) (49) (50) Carcinoma 1 (2%) Myoepithelioma 1 (2%) Skin (50) (50) (50) (50) Squamous Cell Papilloma 1 (2%) Sebaceous Gland, Carcinoma 1 (2%) Subcutaneous Tissue, Fibrosarcoma 2 (4%) 1 (2%) Subcutaneous Tissue, Hemangiosarcoma 1 (2%) Subcutaneous Tissue, Rhabdomyosarcoma, Metastatic, Heart 1 (2%) ____________________________________________________________________________________________________________________________________ MUSCULOSKELETAL SYSTEM Bone (50) (50) (50) (50) Osteosarcoma 1 (2%) 1 (2%) Skeletal Muscle (2) (2) (3) Alveolar/Bronchiolar Carcinoma, Metastatic, Lung 1 (33%) Hemangiosarcoma 1 (33%) Leiomyosarcoma, Metastatic, Uterus 1 (50%) Rhabdomyosarcoma 1 (50%) ____________________________________________________________________________________________________________________________________ NERVOUS SYSTEM Brain (50) (50) (49) (50) ____________________________________________________________________________________________________________________________________ RESPIRATORY SYSTEM Lung (50) (50) (50) (50) Alveolar/Bronchiolar Adenoma 4 (8%) 1 (2%) 2 (4%) 1 (2%) Alveolar/Bronchiolar Carcinoma 1 (2%) 1 (2%) 3 (6%) Alveolar/Bronchiolar Carcinoma, Multiple 1 (2%) 1 (2%) 1 (2%) Carcinoma, Metastatic, Harderian Gland 1 (2%) Hepatocellular Carcinoma, Metastatic, Liver 1 (2%) Histiocytic Sarcoma 2 (4%) 1 (2%) 2 (4%) Rhabdomyosarcoma, Metastatic, Heart 1 (2%) Schwannoma Malignant, Metastatic, Tissue NOS 1 (2%) Squamous Cell Carcinoma, Metastatic, Stomach, Forestomach 1 (2%) NTP Experiment-Test: 05211-06 INCIDENCE RATES OF NEOPLASMS BY ANATOMIC SITE (SYSTEMIC LESIONS ABRIDGED) (a) Report: PEIRPT05 Study Type: CHRONIC EMODIN Date: 12/02/98 Route: DOSED FEED Time: 10:33:41 ____________________________________________________________________________________________________________________________________ B6C3F1 MICE FEMALE 0 312 625 1250 PPM PPM PPM PPM ____________________________________________________________________________________________________________________________________ RESPIRATORY SYSTEM - cont Mediastinum, Alveolar/Bronchiolar Carcinoma, Metastatic, Lung 1 (2%) Mediastinum, Histiocytic Sarcoma 1 (2%) 2 (4%) Nose (50) (50) (50) (50) Histiocytic Sarcoma 1 (2%) Pleura (1) Sarcoma, Metastatic, Mesentery 1 (100%) ____________________________________________________________________________________________________________________________________ SPECIAL SENSES SYSTEM Harderian Gland (1) (3) (4) (3) Adenoma 3 (100%) 3 (75%) 1 (33%) Carcinoma 1 (100%) 2 (67%) Bilateral, Carcinoma 1 (25%) Zymbal's Gland (1) (1) Carcinoma 1 (100%) ____________________________________________________________________________________________________________________________________ URINARY SYSTEM Kidney (49) (50) (50) (49) Histiocytic Sarcoma 1 (2%) 2 (4%) 1 (2%) Leiomyosarcoma, Metastatic, Uterus 1 (2%) Urinary Bladder (49) (50) (49) (48) Histiocytic Sarcoma 1 (2%) ____________________________________________________________________________________________________________________________________ SYSTEMIC LESIONS Multiple Organs *(50) *(50) *(50) *(50) Histiocytic Sarcoma 1 (2%) 2 (4%) 5 (10%) 3 (6%) Lymphoma Malignant 9 (18%) 10 (20%) 8 (16%) 10 (20%) ____________________________________________________________________________________________________________________________________ * Number of animals with any tissue examined microscopically Page 6 NTP Experiment-Test: 05211-06 INCIDENCE RATES OF NEOPLASMS BY ANATOMIC SITE (SYSTEMIC LESIONS ABRIDGED) (a) Report: PEIRPT05 Study Type: CHRONIC EMODIN Date: 12/02/98 Route: DOSED FEED Time: 10:33:41 ____________________________________________________________________________________________________________________________________ B6C3F1 MICE FEMALE 0 312 625 1250 PPM PPM PPM PPM ____________________________________________________________________________________________________________________________________ TUMOR SUMMARY Total Animals with Primary Neoplasms (b) 34 33 43 37 Total Primary Neoplasms 54 52 64 59 Total Animals with Benign Neoplasms 21 23 25 19 Total Benign Neoplasms 25 27 34 26 Total Animals with Malignant Neoplasms 22 22 25 25 Total Malignant Neoplasms 29 25 30 33 Total Animals with Metastatic Neoplasms 3 2 4 Total Metastatic Neoplasm 12 5 6 Total Animals with Malignant Neoplasms 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: 05211-06 INCIDENCE RATES OF NEOPLASMS BY ANATOMIC SITE (SYSTEMIC LESIONS ABRIDGED) (a) Report: PEIRPT05 Study Type: CHRONIC EMODIN Date: 12/02/98 Route: DOSED FEED Time: 10:33:41 ____________________________________________________________________________________________________________________________________ B6C3F1 MICE MALE 0 160 312 625 PPM PPM PPM PPM ____________________________________________________________________________________________________________________________________ DISPOSITION SUMMARY Animals Initially in Study 60 60 60 60 Early Deaths Natural Death 5 7 4 Moribund Sacrifice 4 6 6 7 Survivors Terminal Sacrifice 41 37 40 43 Animals Examined Microscopically 50 50 50 50 ____________________________________________________________________________________________________________________________________ ALIMENTARY SYSTEM Gallbladder (48) (46) (50) (49) Adenoma 1 (2%) Intestine Large, Cecum (47) (49) (50) (50) Carcinoma 1 (2%) Intestine Small, Duodenum (47) (49) (50) (50) Polyp Adenomatous 1 (2%) Intestine Small, Jejunum (47) (46) (49) (50) Carcinoma 4 (8%) Leiomyosarcoma 1 (2%) 1 (2%) Intestine Small, Ileum (48) (49) (50) (50) Liver (50) (50) (50) (50) Alveolar/Bronchiolar Carcinoma, Metastatic, Lung 1 (2%) Hemangiosarcoma 2 (4%) 1 (2%) 1 (2%) Hemangiosarcoma, Multiple 1 (2%) Hepatoblastoma 1 (2%) Hepatocellular Carcinoma 13 (26%) 15 (30%) 17 (34%) 12 (24%) Hepatocellular Carcinoma, Multiple 7 (14%) 10 (20%) 5 (10%) 4 (8%) Hepatocellular Adenoma 7 (14%) 5 (10%) 5 (10%) 7 (14%) Hepatocellular Adenoma, Multiple 2 (4%) 5 (10%) 7 (14%) 4 (8%) Leiomyosarcoma, Metastatic, Intestine Small, Jejunum 1 (2%) Mesentery (2) (4) (6) (5) Alveolar/Bronchiolar Carcinoma, Metastatic, Lung 1 (25%) Carcinoma, Metastatic, Pancreas 1 (20%) Hepatocellular Carcinoma, Metastatic, Liver 1 (17%) 1 (20%) Leiomyosarcoma, Metastatic, Intestine Small, Jejunum 1 (17%) Pancreas (49) (50) (50) (50) Hemangioma 1 (2%) Hepatocellular Carcinoma, Metastatic, Liver 1 (2%) Leiomyosarcoma, Metastatic, Intestine Small, NTP Experiment-Test: 05211-06 INCIDENCE RATES OF NEOPLASMS BY ANATOMIC SITE (SYSTEMIC LESIONS ABRIDGED) (a) Report: PEIRPT05 Study Type: CHRONIC EMODIN Date: 12/02/98 Route: DOSED FEED Time: 10:33:41 ____________________________________________________________________________________________________________________________________ B6C3F1 MICE MALE 0 160 312 625 PPM PPM PPM PPM ____________________________________________________________________________________________________________________________________ ALIMENTARY SYSTEM - cont Jejunum 1 (2%) Duct, Carcinoma 1 (2%) Stomach, Forestomach (50) (50) (50) (50) Squamous Cell Carcinoma 1 (2%) Squamous Cell Papilloma 1 (2%) Stomach, Glandular (50) (50) (50) (50) Tongue (1) Squamous Cell Papilloma 1 (100%) ____________________________________________________________________________________________________________________________________ CARDIOVASCULAR SYSTEM Heart (50) (50) (50) (50) Alveolar/Bronchiolar Carcinoma, Metastatic, Lung 1 (2%) ____________________________________________________________________________________________________________________________________ ENDOCRINE SYSTEM Adrenal Cortex (50) (50) (50) (50) Adenoma 1 (2%) 1 (2%) Capsule, Adenoma 1 (2%) 5 (10%) 4 (8%) 2 (4%) Adrenal Medulla (50) (49) (50) (50) Pheochromocytoma Benign 1 (2%) 1 (2%) Islets, Pancreatic (49) (50) (50) (50) Adenoma 1 (2%) Parathyroid Gland (44) (47) (46) (45) Carcinoma 1 (2%) Thyroid Gland (50) (50) (50) (50) Follicular Cell, Adenoma 1 (2%) 4 (8%) Follicular Cell, Adenoma, Multiple 1 (2%) Follicular Cell, Carcinoma 1 (2%) ____________________________________________________________________________________________________________________________________ GENERAL BODY SYSTEM None ____________________________________________________________________________________________________________________________________ GENITAL SYSTEM Epididymis (50) (50) (50) (50) ____________________________________________________________________________________________________________________________________ NTP Experiment-Test: 05211-06 INCIDENCE RATES OF NEOPLASMS BY ANATOMIC SITE (SYSTEMIC LESIONS ABRIDGED) (a) Report: PEIRPT05 Study Type: CHRONIC EMODIN Date: 12/02/98 Route: DOSED FEED Time: 10:33:41 ____________________________________________________________________________________________________________________________________ B6C3F1 MICE MALE 0 160 312 625 PPM PPM PPM PPM ____________________________________________________________________________________________________________________________________ HEMATOPOIETIC SYSTEM Bone Marrow (50) (50) (50) (50) Mast Cell Tumor Malignant 1 (2%) Lymph Node (6) (3) (4) (1) Mediastinal, Hepatocellular Carcinoma, Metastatic, Liver 1 (33%) Pancreatic, Hepatocellular Carcinoma, Metastatic, Liver 1 (17%) Lymph Node, Mandibular (49) (49) (50) (48) Lymph Node, Mesenteric (49) (46) (50) (49) Spleen (50) (50) (50) (49) Hemangiosarcoma 1 (2%) 1 (2%) Thymus (42) (45) (46) (39) Alveolar/Bronchiolar Carcinoma, Metastatic, Lung 1 (2%) ____________________________________________________________________________________________________________________________________ INTEGUMENTARY SYSTEM Skin (50) (50) (50) (50) Mast Cell Tumor Malignant 1 (2%) Pinna, Fibrosarcoma 1 (2%) Sebaceous Gland, Adenoma 1 (2%) Subcutaneous Tissue, Hemangioma 1 (2%) Subcutaneous Tissue, Hemangiosarcoma 1 (2%) 1 (2%) Subcutaneous Tissue, Hepatocellular Carcinoma, Metastatic, Liver 1 (2%) Subcutaneous Tissue, Schwannoma Malignant 1 (2%) ____________________________________________________________________________________________________________________________________ MUSCULOSKELETAL SYSTEM Skeletal Muscle (3) (1) (2) Alveolar/Bronchiolar Carcinoma, Metastatic, Lung 1 (33%) Carcinoma, Metastatic, Pancreas 1 (50%) Hemangiosarcoma, Metastatic, Liver 1 (50%) Leiomyosarcoma, Metastatic, Intestine Small, Jejunum 1 (100%) ____________________________________________________________________________________________________________________________________ NERVOUS SYSTEM Brain (49) (50) (50) (50) ____________________________________________________________________________________________________________________________________ NTP Experiment-Test: 05211-06 INCIDENCE RATES OF NEOPLASMS BY ANATOMIC SITE (SYSTEMIC LESIONS ABRIDGED) (a) Report: PEIRPT05 Study Type: CHRONIC EMODIN Date: 12/02/98 Route: DOSED FEED Time: 10:33:41 ____________________________________________________________________________________________________________________________________ B6C3F1 MICE MALE 0 160 312 625 PPM PPM PPM PPM ____________________________________________________________________________________________________________________________________ RESPIRATORY SYSTEM Lung (50) (50) (50) (50) Alveolar/Bronchiolar Adenoma 9 (18%) 9 (18%) 5 (10%) 7 (14%) Alveolar/Bronchiolar Adenoma, Multiple 1 (2%) Alveolar/Bronchiolar Carcinoma 9 (18%) 6 (12%) 6 (12%) 5 (10%) Alveolar/Bronchiolar Carcinoma, Multiple 1 (2%) 3 (6%) Carcinoma, Metastatic, Pancreas 1 (2%) Hepatocellular Carcinoma, Metastatic, Liver 2 (4%) 3 (6%) 5 (10%) 3 (6%) Leiomyosarcoma, Metastatic, Intestine Small, Jejunum 1 (2%) Mediastinum, Alveolar/Bronchiolar Carcinoma, Metastatic, Lung 1 (2%) Mediastinum, Leiomyosarcoma, Metastatic, Intestine Small, Jejunum 1 (2%) Nose (50) (50) (50) (50) ____________________________________________________________________________________________________________________________________ SPECIAL SENSES SYSTEM Ear (1) External Ear, Histiocytic Sarcoma 1 (100%) Harderian Gland (4) (3) (4) (7) Adenoma 4 (100%) 2 (67%) 3 (75%) 4 (57%) Carcinoma 1 (33%) 1 (25%) 3 (43%) ____________________________________________________________________________________________________________________________________ URINARY SYSTEM Kidney (49) (50) (50) (50) Alveolar/Bronchiolar Carcinoma, Metastatic, Lung 1 (2%) Carcinoma, Metastatic, Pancreas 1 (2%) Renal Tubule, Adenoma 1 (2%) 1 (2%) Renal Tubule, Carcinoma 1 (2%) 1 (2%) Urethra (1) Urinary Bladder (49) (50) (50) (50) Hemangioma 1 (2%) ____________________________________________________________________________________________________________________________________ SYSTEMIC LESIONS Multiple Organs *(50) *(50) *(50) *(50) Histiocytic Sarcoma 1 (2%) Lymphoma Malignant 5 (10%) 3 (6%) 3 (6%) 1 (2%) ____________________________________________________________________________________________________________________________________ * Number of animals with any tissue examined microscopically Page 11 NTP Experiment-Test: 05211-06 INCIDENCE RATES OF NEOPLASMS BY ANATOMIC SITE (SYSTEMIC LESIONS ABRIDGED) (a) Report: PEIRPT05 Study Type: CHRONIC EMODIN Date: 12/02/98 Route: DOSED FEED Time: 10:33:41 ____________________________________________________________________________________________________________________________________ B6C3F1 MICE MALE 0 160 312 625 PPM PPM PPM PPM ____________________________________________________________________________________________________________________________________ TUMOR SUMMARY Total Animals with Primary Neoplasms (b) 43 46 43 37 Total Primary Neoplasms 74 76 71 56 Total Animals with Benign Neoplasms 24 27 24 22 Total Benign Neoplasms 29 36 30 24 Total Animals with Malignant Neoplasms 31 33 32 26 Total Malignant Neoplasms 45 40 41 32 Total Animals with Metastatic Neoplasms 3 4 6 5 Total Metastatic Neoplasm 5 11 11 10 Total Animals with Malignant Neoplasms 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 ------------------------------------------------------------ ---------- END OF REPORT ---------- ------------------------------------------------------------