An ovarian teratoma in a cat

A 5-month-old, intact female, domestic short-haired cat was presented for e valuation of abdominal distension. Abdominal radiographs revealed a midabdo minal mass that contained multiple, irregular, mineralized opacities. The m ass was surgically removed, and an ovariohysterectomy performed. The mass w as located at the tip of the left uterine horn and was covered partially by haired skin. Histologically, the mass was diagnosed as a mature ovarian te ratoma based on the presence of well-differentiated somatic structures deri ved from three primary embryonal germ-cell layers. Germ-cell tumor classifi cation and feline ovarian teratomas are reviewed.