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Journal of Veterinary Diagnostic Investigation, Vol 15, Issue 1, 77-81
Copyright © 2003 by American Association of Veterinary Laboratory Diagnosticians

Case Reports

Malignant ovarian teratoma in a red-eared slider (Trachemys scripta elegans)

SJ Newman, CJ Brown, and AK Patnaik

Department of Pathology, Animal Medical Center, 510 East 62nd Street, New York, NY 10021-8314, USA.

A 7-year-old intact female red-eared slider (Trachemys scripta elegans) presented with anorexia of 2-3-weeks duration. Coelomic radiographs demonstrated 3 shelled eggs in the right cavity. Hormone therapy failed to induce oviposition. Exploratory laparotomy revealed 3 calcified eggs in the right oviduct and a large mass obliterating the left ovary. The large, multilobulate mass had scattered, firm, white nodules and weighed 450 g. Histopathology revealed a malignant teratoma composed of immature embryonaland extraembryonal elements derived from all 3 germ layers with multifocal epithelial anaplasia. This is the first report of a teratoma in chelonian gonadal tissue. Teratomas and reptilian gonadal neoplasia are reviewed.




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