Long‐term outcome in a dog with a unilateral ovarian granulosa cell tumour with a concurrent non‐neoplastic abdominal effusion following ovariohysterectomy

Abstract An 8‐year‐old, entire, female Boston terrier presented with chronic abdominal distention and acute anorexia. Physical examination identified a palpable abdominal mass and ascites. Results of haematological and serum biochemical investigations were within reference range. Fluid analysis from abdominocentesis was consistent with an exudate with abundant macrophages. Computed tomography and magnetic resonance imaging revealed that the mass was ovarian in origin without apparent metastasis. Ovariohysterectomy was performed. Thereafter, the patient's ascites did not reaccumulate. Histopathological diagnosis of the mass was a granulosa cell tumour. Repeated tumour staging with computed tomography was performed up to 36 months after surgery, which confirmed no local disease recurrence, metastasis or ascites.