Treatment of gastric remnant cancer post distal gastrectomy by endoscopic submucosal dissection using an insulation-tipped diathermic knife

Table 1 Tumor characteristics of patients in the ESD and EMR groups

	ESD group	EMR group
n	17	15
Location of the tumor (%)
Posterior wall	4 (23.5)	3 (20)
Anterior wall	4 (23.5)	2 (13)
Lesser curvature	6 (35)	6 (40)
Greater curvature	3 (18)	4 (27)
Gross type of the tumor (%)
Superficial depressed type	11 (65)	10 (67)
Superficial elevated type	6 (35)	5 (33)

Table 2 Characteristics and results of clinical data of patients in the ESD and EMR groups

	ESD group (tumor size: 10-26 mm)	EMR group (tumor size: 10-18 mm)	P
n	17	15
Mean age (yr)	73.1 ± 5.4	68.3 ± 9.2	NS
Mean size of the lesion (mm)	15.5 ± 5.6	12.7 ± 2.9	NS
Frequency of the cardiopulmonary underlying disease (%)	12	13	NS
Frequency of the anticoagulant therapy (%)	5.9	6.7	NS
One piece resection rate (%)	100	73	NS
Complete resection rate (%)	82	40	< 0.05
Operation time (min)	57.6 ± 31.9	21.1 ± 12.2	< 0.001
Complications
Rate of bleeding (%)	18	6.7	NS
Rate of perforation (%)	0	0	NS
Depth of invasion (mucosa:submucosa)	15:2	14:1

NS: Not significant.