Canine ovarian tumours: A retrospective study of 49 cases

摘要

Primary ovarian tumours are relatively uncommon in domestic animals. They may be classified by histogenetic criteria into four major categories: (1) epithelial, (2) germ cell, (3) sex-cord stromal and (4) mesenchymal tumours. Bitch ovarian tumours are usually epithelial and bilateral, whereas in the cow and mare they are often unilateral and mostly of the sex-cord stromal type. In canine species, the incidence ranges from 1% to 6% and the age of affected animals varies from 5 to 15 years, although granulosa cell tumours (GCTs) and teratomas generally develop in younger animals. A breed predisposition has not been reported, but bulldogs and boxers seem to show a higher risk.