. Author manuscript; available in PMC: 2022 Apr 1.

Published in final edited form as: J Clin Gastroenterol. 2021 Apr 1;55(4):e27–e36. doi: 10.1097/MCG.0000000000001410

Table 2:

Indications and site of lesions

	Indications								Locations
	Difficult Adenomas					Early Carcinoma	Subepithelial	Others	Proximal Colon			Distal Colon		Rectum	Others
Study	Recurrent nonlifitng adenomas	Resiudal nonlifitng adenomas	Primary nonlifting adenomas	Peri-appendicular adenomas	Peri-diverticular adenomas	Early Carcinoma	Subepithelial	Others	Cecum	Ascending Colon	Transverse	Descending	Sigmoid	Rectum
Aepli P et al., 2017¹⁸	19	0	4	2	1	2	1	4 (staging)	9	9	0	2	1	12	N/A
Andrisani et al.,2018⁶	39	26	12	2	2	16	10	3 (Diagnostic resection)	7	11	17	6	10	59	N/A
Schmidt et al., 2018⁵	53	19	32	34	5	15	23	N/A	55	35	22	8	30	30	N/A
Valli et al., 2018¹⁹	22	10	2	4	2	13	5	2 (Over endoloop)	9	15	1	16	N/A	14	5 (stomach)
Vitali et al., 2018²⁰	2	3	6	N/A	1	N/A	1	N/A	2	4	0	1	0	6	N/A
Van der Spek et al., 2018¹⁷	3	12	4	N/A	2	28	2	N/A	1	8	2	6	16	18	N/A
Velegraki et al., 2019²³	0	5	1	2	0	3	6	N/A	3	0	1	0	11	2	N/A
Rahman et al., 2016²²	5					4	2	N/A	Not reported	Not reported	Not reported	Not reported	Not reported	Not reported	N/A
Ichkhanian et al., 2019²¹	48					17	10	N/A	46			17		16	N/A
Total	384 (68.7%)					98 (17.5%)	60 (10.7%)		257 (47.3%)			124 (22.8%)		157 (28.9%)	5 (1%)