A case of diminutive duodenal deep submucosal invasive adenocarcinoma resected by endoscopic mucosal resection

Abstract

A 50-year-old man underwent esophagogastroduodenoscopy, which revealed a tiny duodenal polypoid tumor 4 mm in diameter in the descending part of the duodenum. The tumor had no depressive area. Narrow-band imaging magnifying endoscopic findings revealed regular surface and vessel patterns.

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