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![Cold snare polypectomy and underwater endoscopic mucosal resection for superficial nonampullary duodenal epithelial tumors](https://image.oaes.cc/0b1a6eec-d5e0-4281-83f2-e3a0d4c544cb/4812.fig.1.jpg)
Figure 1. (A) Endoscopic white light image showing adenoma, 2nd portion, 0-IIa, 6 mm; (B) endoscopic narrow band imaging; (C) endoscopic image with indigo carmine spraying; (D) snaring with 10 mm snare; (E) mucosal defect after CSP with a procedure time of 1 min; (F) complete prophylactic clipping with three clips; (G) resected specimen shown as a white light image; (H) resected specimen shown by narrow band imaging; and (I) histopathological image with hematoxylin and eosin stain. The histopathological diagnosis was tubular adenoma, pHM0, pVM0.