A bilateral ovarian psammomatous papillary cystic adenocarcinoma in a German Shepherd bitch

A 14-year-old, 30-kg, intact female, German Shepherd was presented with a history of lethargy, anorexia, decreased body condition, dyspnoea, enlarged abdomen and abnormal oestral manifestation. The dog was then referred for further and complete clinical evaluation. On physical evaluation, the dog was depressed, dyspnoic, slightly dehydrated and the abdomen was distended with a positive succussion; an abdominal effusion was presumed. Disseminated peritoneal carcinomatosis with multi-organ metastasis and bilateral ovarian cystic papillary adenocarcinoma was diagnosed. Multiple psammoma bodies were also seen scattered throughout the examined tissue sections of ovarian tumours. Clinicians and pathologist should be alert to the occurrence of these uncommon tumour and its clinical pathological features and should be familiar with their diagnosis and management.