Short- and long-term outcomes of endoscopically treated superficial non-ampullary duodenal epithelial tumors

Figure 2 The endoscopic submucosal dissection method of superficial non-ampullary duodenal epithelial tumors. Type 0-IIa lesion, 25 mm × 25 mm, mucosal carcinoma, cut-end negative. A: Flat, elevated-type lesion was located in the second portion of the duodenum; B: Performing circumferential incision and submucosal dissection; C: Ulcer findings just after lesion removal. The lesion was resected en bloc, and there was no bleeding or perforation in the ulcer just after the procedure; D: After 2 mo of endoscopic submucosal dissection, the wound became a scar, and no residual tumor was found.