Abstract
Recently, underwater endoscopic mucosal resection (U-EMR) has become established for treating duodenal adenomas. However, it is difficult to completely resect a large duodenal adenoma with en bloc resection [1]. An appropriate U-EMR method is desirable because the resection margin on the oral side is sometimes positive [2]. We devised a method for en bloc resection of large duodenal adenomas, called clip-line-assisted underwater endoscopic mucosal resection (CLU-EMR).
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