title: Spontaneous neoplasms in aged CD-1 mice.
abstract: Spontaneous neoplasms in untreated control CD-1 mice (725 males and 725 females) used in carcinogenicity studies were evaluated and tabulated. The most common neoplasms in male mice were alveolar-bronchiolar adenomas (19.3%) followed by hepatocellular adenomas (11.0%), lymphoreticular neoplasms (6.8%), hepatocellular carcinomas (5.7%), Harderian gland adenomas (2.9%), alveolar-bronchiolar carcinomas (2.5%), and testicular interstitial cell tumors (1.9%). In the females, the most frequently occurring neoplasms were lymphoreticular neoplasms (16.4%) followed by alveolar-bronchiolar adenomas (12.3%), uterine endometrial polyps (4.3%), uterine leiomyomas (3.5%), mammary adenocarcinomas (2.5%), hepatocellular adenomas (1.8%), hemangiomas (1.7%), Harderian adenomas (1.7%), alveolar-bronchiolar carcinomas (1.5%), and pituitary adenomas (1.1%). Tumors in other various organs were found at a low incidence.
authors.affiliation: Experimental Pathology Department, American Cyanamid Company, Pearl River, NY 10965.
authors.forename: M
authors.initials: M
authors.lastname: Chandra
authors.forename: C H
authors.initials: CH
authors.lastname: Frith
mesh_terms: D000375:Aging; D000818:Animals; D005260:Female; D008297:Male; D051379:Mice; D009362:Neoplasm Metastasis; D009369:Neoplasms / Q000662:veterinary*; D012376:Rodent Diseases / Q000209:etiology* / Q000473:pathology