Fig. 1From: Long-term endoscopic submucosal dissection with postoperative lung injury: a case reportGastroscopy images in the surgery. a Before surgery, a 3.1 × 3.5 cm hypoechoic mass at the junction of antrum and body of stomach was seen. The center of the tumor was sunken and tough. b Intraoperative perforation. c The perforation was sutured at the end of the surgeryBack to article page