neoplasm
• occurred in 2 out of 26 homozygous mice over 12 months of age
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• occurred in 3 out of 26 homozygous mice over 12 months of age
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• in mutants older than 12 months increased incidence of B cell lymphomas (6 out of 26) and lymphocyte infiltrations (2 out of 26) are seen
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• forestomach papillomas occurred in 6 out of 26 homozygous mice over 12 months of age
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digestive/alimentary system
• small intestinal lesions including polyps (7 out of 26), fused villi (3 out of 26) and swollen crypts (1 out of 26) are seen
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liver/biliary system
• occurred in 2 out of 26 homozygous mice over 12 months of age
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