Abstract
A 65-year-old man was diagnosed with intramucosal carcinoma by endoscopy and pathological biopsy; the tumor was 10 mm in size and located in the greater curvature of the gastric body ([Fig. 1 a]). It was difficult to perform endoscopic submucosal dissection (ESD) on the greater curvature of the gastric body. We therefore proposed a three-arm endoscopic mucosal resection (TA-EMR) technique in which two nasal oxygen tubes, about 80 cm in length, were taped to the outside of the endoscope to become a double additional working channel (AWC) ([Video 1]).
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