title: Two distinct carcinomas of mammary gland origin in a California sea lion.
abstract: Two histologic types of mammary cancer were encountered in an aged captive California sea lion (Zalophus californianus). A cancer with myoepithelial cell proliferation, which had metastasized to distant viscera, was located in the left cranial mammary region. Another cancer without myoepithelial cell proliferation was located in the right posterior mammary region, formed secondary nodules, and had metastasized to a regional lymph node. The presence of two different neoplasms in this sea lion is unusual.
authors.affiliation: Department of Veterinary Pathology, School of Veterinary Medicine, Azabu University, 1-17-71 Fuchinobe, Sagamihara, Kanagawa 229-8501, Japan. matsuda@nval.go.jp
authors.forename: Michiko
authors.initials: M
authors.lastname: Matsuda
authors.forename: Shinichiro
authors.initials: S
authors.lastname: Hashiura
authors.forename: Yumi
authors.initials: Y
authors.lastname: Une
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Sirouzu
authors.forename: Yasuo
authors.initials: Y
authors.lastname: Nomura
mesh_terms: D000818:Animals; D000836:Animals, Zoo; D002277:Carcinoma / Q000175:diagnosis / Q000473:pathology / Q000662:veterinary*; D017809:Fatal Outcome; D005260:Female; D007150:Immunohistochemistry / Q000662:veterinary; D008207:Lymphatic Metastasis; D015674:Mammary Neoplasms, Animal / Q000175:diagnosis* / Q000473:pathology / Q000556:secondary; D009208:Myoepithelioma / Q000175:diagnosis / Q000473:pathology / Q000662:veterinary*; D009378:Neoplasms, Multiple Primary / Q000175:diagnosis / Q000473:pathology / Q000662:veterinary*; D046070:Sea Lions