Endoscopic submucosal dissection for small submucosal tumors of the rectum compared with endoscopic submucosal resection with a ligation device

Table 2 Clinical outcomes between endoscopic submucosal resection with a ligation device and endoscopic submucosal dissection n (%)

	ESMR-L (n = 21)	ESD (n = 18)	P value
En bloc resection	21 (100)	18 (100)
Endoscopic complete resection	20 (95.2)	18 (100)	0.462
Histological evaluation
Vertical margin involvement	1 (4.8)	0 (0)	0.717
Lymphovascular invasion	0 (0)	1 (5.6)
Pathological findings
Carcinoid	20 (95.2)	15 (83.3)	0.318
Others	1 (4.8)	3 (16.7)
Complication
Post-operative bleeding	1 (4.8)	0 (0)	0.462
Procedure time (min, mean ± SD)	5.4 ± 1.7	14.7 ± 6.4	< 0.001
Hospitalization (d, mean ± SD)	2.8 ± 1.5	3.7 ± 0.9	0.024
Local recurrence	0 (0)	0 (0)
Distant recurrence	0 (0)	0 (0)

ESMR-L: Endoscopic submucosal resection with a ligation device; ESD: Endoscopic submucosal dissection.