title: Spontaneous neoplasms in B6C3F1 mice.
abstract: Spontaneous neoplasms in untreated B6C3F1 mice (200 males and 200 females) used as controls in 4 carcinogenicity studies were evaluated and tabulated. The most common neoplasms in male mice were hepatocellular adenomas/carcinomas (24.5%) followed by alveolar-bronchiolar adenomas/carcinomas (10.0%), lymphoreticular neoplasms (7.0%) [malignant lymphomas mixed (4.5%), histiocytic sarcomas (3.5%)], harderian gland adenoma (6.5%), and hemangiomas/hemangiosarcomas (5.5%). In the females, the most frequently occurring neoplasms were lymphoreticular neoplasms (22.0%) [malignant lymphoma mixed (10.0%), malignant lymphoma lymphocytic (6.5%), histiocytic sarcomas (5.5%)] followed by pituitary adenomas (15.5%), alveolar-bronchial adenomas/carcinomas (11.5%), hepatocellular adenomas/carcinomas (7.0%), harderian gland adenomas, uterine stromal polyps (2.5%), and hemangiomas/hemangiosarcoma (2.0%). The incidence of tumors in various other organs was found to be low.
authors.affiliation: Department of Experimental Pathology, 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: D000818:Animals; D005260:Female; D015994:Incidence; D008297:Male; D051379:Mice; D008815:Mice, Inbred Strains; D009369:Neoplasms / Q000453:epidemiology / Q000662:veterinary*; D012376:Rodent Diseases / Q000453:epidemiology*; D012737:Sex Factors