Additional gastrectomy after endoscopic mucosal resection for early gastric cancer.

The aim of this study was to examine the clinicopathological characteristics of cases undergoing additional gastrectomy after endoscopic mucosal resection (EMR) for early gastric cancer (EGC) and the appropriate strategy for treating those after incomplete EMR. We studied 16 patients who underwent additional gastrectomy after EMR for EGC. The reasons for additional gastrectomy were positive horizontal margin (8 cases), indeterminate horizontal margin (2 cases), positive vertical margin (4 cases), submucosal invasion (7 cases), lymphatic invasion (4 cases), venous invasion (1 case), and local recurrence (2 cases, including overlapped cases).