From Dog
Macroscopic appearance of a thecoma removed from a dog[1]

Thecoma are a benign sex cord stromal tumor of the canine ovary.

Thecomas are usually non-malignant and very rare in dogs[2].

Diagnosis is based on abdominal ultrasonography and histological examination of biopsied material, usually obtained during exploratory laparotomy.

A definitive diagnosis includes hydrosalpynx, cystadenoma, ovarian teratomas, ovarian carcinoma and dysgerminoma[3].

Treatment is usually curative with ovariectomy. Cases with metastatic spread to visceral organs have a guarded prognosis and may require adjunctive chemotherapy with drugs such as doxorubicin.


  1. University of Guelph
  2. Faulkner RT (1978) Removal of a thecoma in a Poodle. Vet Med Small Anim Clin 73(4):451-452
  3. Bertazzolo W et al (2004) Cytological features of canine ovarian tumours: a retrospective study of 19 cases. J Small Anim Pract 45(11):539-545