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Endoscopic findings of non-invasive neoplasia. A: Macroscopic type:elevated (left), and depressed (right); B: Color:reddish (left), and discolored (right); C: Surface pattern: smooth (left) and nodular (right). List of abbreviations: ER: Endoscopic resection; QOL: Quality of life; EMR: Endoscopic mucosal resection; ESD: Endoscopic submucosal dissection.
