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 Endoscopy Center Liaoyang Liaohua Hospital Liaoyang 111000 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;
Anastomotic stoma; Rectal cancer; Submucosal tumor; Endoscopic fenestration; Delayed postoperative abscess; Case report;