Table 1. Characteristics and outcomes of patients treated with OTSC.

Patient	Sex	Age	Location of perforation	Cause	Perforation size	Use of twin grasper	Technical success	Clinical success
1	M	81	Rectosigmoid junction	Diagnostic colonoscopy	10 mm	No	Yes	No (surgical intervention)
2	F	73	Colorectal anastomoses	Therapeutic colonoscopy (EMR)	10 mm	Yes	Yes	Yes
3	F	73	Rectum	Therapeutic colonoscopy (ESD)	20 mm	Yes	Yes	Yes
4	F	63	Sigmoid	Therapeutic colonoscopy (EMR)	15 mm	Yes	Yes	Yes
5	F	71	Sigmoid	Therapeutic colonoscopy (EMR)	10 mm	No	Yes	Yes
6	F	43	Rectosigmoid junction	Diagnostic colonoscopy	10 mm	Yes	Yes	No (ureteral obstruction)
7	F	92	Sigmoid	Diagnostic colonoscopy	10 mm	No	Yes	Yes
8	F	78	Cardia	Therapeutic gastroscopy (EMR)	10 mm	No	Yes	Yes
9	F	56	Duodenal bulb	Diagnostic EUS	10 mm	No	Yes	Yes
10	F	78	Duodenal bulb	Diagnostic EUS	10 mm	No	Yes	Yes
11	F	93	Duodenum	Diagnostic EUS	10 mm	No	Yes	Yes

F = female, M = male

EMR, endoscopic mucosal resection; ESD, endoscopic submucosal dissection; EUS, endoscopic ultrasonography