A case of canine malignant histiocytoma

Abstract

A 13 year-old mixed-breed male dog was presented for a second opinion at the veterinary clinic with a tumor of approximately 15 cm3 on its abdomen. Fine-needle aspiration and cytological examination revealed moderately and distinctly displastic mesenchymal cells. Abdominal radiographs showed the extent of the tumor, which had developed mostly inside the abdomen. Radiography and CT revealed possible metastasis to the lungs. A diagnosis of malignant histiocytoma was made. The tumor was surgically removed at the owner’s request, but the dog died 5 days later. We follow with a case discussion, as well as the treatment and prognosis for this type of tumor.