Carcinoid Tumor in the Small Intestine of a Dog

Abstract

An intestinal neoplasm with morphologic and histochemical characteristics of a carcinoid tumor caused clinical disease and death in a 9-year-old male Old English Sheepdog. Clinical findings over a 9-month period included intermittent diarrhea, intestinal bleeding, emaciation, anemia, and thrombocytopenia. The tumor was in the intestinal wall at the ileocecal junction and had metastasized to the liver. It was composed of densely populated nests and cords of round to polyhedral cells that were argentaffinic and argyrophilic. It was similar to ileocecal carcinoid tumors of man. © 1974, American College of Veterinary Pathologists. All rights reserved.