Gangliocytic Paraganglioma with Carcinoma of the Ampulla of Vater.

The patient was a "73" -year-old woman who visited our hospital with the chief complaint of weight loss. Upper gastrointestinal endoscopy revealed an enlarged ampulla of Vater, and a biopsy led to a diagnosis of Group "4" gastric carcinoma; suspicious of adenocarcinoma. There were no findings suggesting invasion into the muscle layer of duodenum, despite tumor mass formation being observed in the sphincter of Oddi. We performed endoscopic papillectomy for both diagnostic and therapeutic purposes. Pathologically, a well-differentiated adenocarcinoma existed in the superficial layer of the mucous membrane of the papilla of Vater, and gangliocytic paraganglioma was present in the deep portion. The resected margins of both lesions were negative.