Short- and long-term outcomes after endoscopic resection of sporadic nonampullary duodenal tumors: An 11-year single-center retrospective study

Figure 4 Endoscopic submucosal dissection with snare for sporadic nonampullary duodenal tumor. 0-IIa lesion, 12 mm × 8 mm, high-grade intraepithelial neoplasia, vertical margin (-), horizontal margin (-). A: Lesion in the descending duodenum; B: Narrow band imaging abnormalities; C: Indigo carmine delineation; D: Submucosal dissection until most of the lesion was freed; E: Final snare excision; F: Post-endoscopic submucosal dissection with snare ulcer; G: Clip closure; H: En bloc specimen.