Figure 2.

A case of perforation. (A) A laterally spreading, granular type lesion about 30 mm located in the ascending colon. (B) Adequate floating of the lesion could not be achieved and, therefore, submucosal injection, using normal saline, was performed before snaring. (C) The lesion was snared, using a 33-mm snare, and the lesion was tightened-up. (D) En bloc resection was achieved but the muscularis propria was slightly injured at the center of the mucosal defect. (E) An obvious perforation was identified after gas insufflation in the lumen. (F) Endoscopic clipping was performed, and surgical intervention was not required.