title: Mammary adenocarcinoma in a male squirrel monkey (Saimiri sciureus).
abstract: A nodule was identified within the right mammary gland of a 16-year-old male squirrel monkey (Saimiri sciureus). The mass was excised and diagnosed as a mammary adenocarcinoma. The monkey developed congestive heart failure 1.5 years later and was euthanatized. At necropsy, a subcutaneous mass was found in the right axillary region. Histologically, the mass was identified as a lymph node whose architecture was effaced by neoplastic cells resembling those of the mammary tumor. Metastasis to internal organs was not observed. This is the first reported case of a mammary tumor in a New World primate and the only known case of mammary cancer in a male nonhuman primate.
authors.forename: K S
authors.initials: KS
authors.lastname: Waggie
authors.forename: R J
authors.initials: RJ
authors.lastname: Tolwani
authors.forename: D M
authors.initials: DM
authors.lastname: Lyons
mesh_terms: D000818:Animals; D008297:Male; D000230:Adenocarcinoma / Q000150:complications / Q000473:pathology / Q000662:veterinary; D005065:Euthanasia; D006333:Heart Failure / Q000150:complications / Q000662:veterinary; D008198:Lymph Nodes / Q000473:pathology; D008223:Lymphoma / Q000473:pathology / Q000662:veterinary; D008321:Mammary Glands, Animal / Q000473:pathology; D008992:Monkey Diseases / Q000473:pathology; D012453:Saimiri; D015674:Mammary Neoplasms, Animal / Q000150:complications / Q000473:pathology