Endoscopic mucosal resection of colorectal polyps in typical UK hospitals

Table 2 Characteristics of polyps according to histopathology n (%)

	Non-adenomas	Adenomas	Carcinoma-in-situ
Age (yr)1	61.3 ± 12.9	69.2 ± 9.9	76.2 ± 11.2
Sex
M	15	117	9
F	23	64	4
Polyp size (mm)1	13.9 ± 5.2	20.8 ± 13.1	22.7 ± 14.9
Polyp location
Cecum	13 (34.2)	31 (17.1)	2 (15.4)
Ascending colon	5 (13.2)	24 (13.3)	0
Transverse colon	9 (23.7)	15 (8.3)	1 (7.7)
Descending colon	4 (10.5)	29 (16.0)	0
Sigmoid colon	6 (15.8)	33 (18.2)	3 (2.3)
Rectum	1 (2.6)	49 (27.1)	7 (5.4)
Total	38	181	13
Resection method
En bloc	33 (86.8)	129 (71.3)	9 (69.2)
Piecemeal	5 (13.2)	50 (27.6)	4 (30.8)
Not recorded	0	2 (1.1)	0
Complete resection
Yes	36 (94.7)	154 (85.1)	10 (76.9)
No	2 (5.3)	26 (14.4)	3 (23.1)
Not recorded	0	1 (0.5)	0
Recurrence2
No		75 (48.8)	1 (10.0)
Yes		30 (19.4)	3 (30.0)
No follow up		49 (31.8)	6 (60.0)

¹Values are mean ± SD;

²Only completely resected lesions were assessed for recurrence. Values are number of patients with percentages in parentheses unless indicated otherwise.