A Case of a Submucosal Ganglioneuroma of the Ampulla of Vater That Was Treated by Endoscopic Resection

Submucosal tumors in the gastrointestinal tract are covered with a mucous membrane such as the surrounding tissue. Therefore, the use of endoscopic biopsy to diagnose submucosal tumors is not as effective as that for epithelial tumors. Although imaging tools such as ultrasonography or computed tomography have made great advances, it is still difficult to diagnose submucosal tumors before resection. The surgical resection of tumors is the most accurate diagnostic method, yet less invasive endoscopic resection has been preferred in recent years. We report herein on a rare case of ganglionueroma arising from the Ampulla of Vater and this lesion was incidentally found during performance of routine esohagogastroduodenoscopy. The lesion was diagnosed as a ganglioneuroma, and it was successfully removed through endoscopic resection.