A case of ulcerating type of gastric schwannoma, histological diagnosis was established after surgery

A 50 year-old woman was found to have gastric submucosal tumor with central ulceration, was observed in the greater curvature by upper gastrointestinal endoscopy. Biopsy was done but pathological diagnosis was not obtained. A hypoechoic, partially non-echoic mass was observed by EUS and EUS-FNA was performed, but pathological diagnosis could not be made. Gastrointestinal stromal tumor was suspected, and Laparoscopy and Endoscopy Cooperative Surgery was done. Pathological examination was observed dense growth of spindle-shaped cells. Immunohistochemical staining were S100 (+) , CD117 (-) , CD34 (-) , desmin (-) , so it was diagnosed gastric schwannoma. We present a rare case of gastric schwannoma, whose diagnosis was established histologically after surgery.