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The procedure of endoscopic submucosal dissection for a gastric neuroendocrine tumor. (a, b) A sessile polyp with a reddened surface of the gastric body. (c) Making. (d) Injection. (e, f) Dissection. (g) Resultant artificial ulcer. (h) Closure of the defect with metallic clips. (i) Completely resected specimen.
