Gastric extramedullary plasmacytoma in a dog

Abstract

An eight-year-old, spayed female Shih-tzu, weighing 3.2 kg with a history of chronic intermittent vomiting and unknown pain for four months was referred. In ultrasonography, a small round hypoechoic mass was identified in the gastric wall. Gastric endoscopy showed a solitary raised mass with smooth surface in the pyloric antrum. Surgical resection was performed. Histopathologic findings with immunohistochemical studies showed extramedullary plasma-cytoma in the gastric submucosal and muscle wall layer. The patient recovered normally without any complications. The tumor has not been re-occurred after surgical removal, to date.