Purswell, B J Theriogenology question of the month. Persistent estrus caused by functional granulosa cell tumor of the left ovary. [electronic resource] - Journal of the American Veterinary Medical Association Jul 1999 - 193-5 p. digital Publication Type: Case Reports; Journal Article ISSN: 0003-1488 Subjects--Topical Terms: AnimalsDog Diseases--diagnostic imagingDogsEstrus--physiologyFemaleGranulosa Cell Tumor--complicationsOvarian Neoplasms--complicationsUltrasonography