Department of Gastroenterology Shengjing Hospital of China Medical University Shenyang 110004 Liaoning Province China;
Department of Gastroenterology Shengjing Hospital of China Medical University Shenyang 110004 Liaoning Province China;
Department of Gastroenterology Shengjing Hospital of China Medical University Shenyang 110004 Liaoning Province China;
Department of Gastroenterology Shengjing Hospital of China Medical University Shenyang 110004 Liaoning Province China;
Department of Gastroenterology Shengjing Hospital of China Medical University Shenyang 110004 Liaoning Province China;
Department of Gastroenterology Shengjing Hospital of China Medical University Shenyang 110004 Liaoning Province China;
Department of Gastroenterology Shengjing Hospital of China Medical University Shenyang 110004 Liaoning Province China;
Department of Gastroenterology Shengjing Hospital of China Medical University Shenyang 110004 Liaoning Province China;
Endoscopic mucosal resection; Endoscopic submucosal dissection; Endoscopic piecemeal mucosal resection; Delayed perforation; Endoscopic closure; Case report;