For “difficult” benign colorectal lesions referred to surgical resection a second opinion by an experienced endoscopist is mandatory: A single centre experience

Table 2 Characteristics of colorectal lesions resected

No. of lesions	69
Size (mm ± SD) (range)	33 ± 12 (20-80)
Shape (%)
0-Ip	11 (16)
0-Isp	1 (1.5)
0-Is	15 (22)
0–IIa	16 (23)
0–IIa + Is	15 (22)
0–IIa + IIc	8 (11.5)
0–IIb	3 (4)
Location (%)
Anorectal junction	4 (6)
Rectal	6 (8.5)
Rectosigmoid junction	13 (19)
Sigmoid	15 (22)
Descending colon	2 (3)
Splenic flexure	3 (4)
Transverse	1 (1.5)
Hepatic flexure	9 (13)
Ascending colon	6 (8.5)
Caecum only	8 (11.5)
Cecum with ileocecal valve involvement	2 (3)
Technique of endoscopic resection for the 57 sessile and non-polypoid lesions
En-bloc endoscopic mucosal resection	23
Piecemeal endoscopic mucosal resection	34
Resection with argon plasma coaugulation	15
Technique of endoscopic resection for the 12 pedunculated and semipedunculated lesions
Clips	9
Endoloop	3
Complications (%)	11 (16)
Bleeding	7
Perforation	2
Transmural burn syndrome	2
Histology (%)
Tubular adenoma	13 (19)
Villous adenoma	22 (32)
Tubulovillous adenoma	33 (47.5)
Serrated adenoma	1 (1.5)
Low-grade dysplasia	3 (4)
High-grade dysplasia	45 (65.5)
Intramucosal cancer	14 (20.5)
Invasive cancer	7 (10)

mm: Millimeters; 0-Ip: Pedunculated lesions; 0-Isp: Semi-pedunculated lesions; 0-Is: Sessile lesions; 0-IIa: Elevated non-polypoid lesions; 0-IIb: Barely perceptible elevated non-polypoid lesions; 0–IIc: Slightly depressed non-polypoid lesions.