Thread-Traction with a Sheath of Polypectomy Snare Facilitates Endoscopic Submucosal Dissection of Early Gastric Cancers

Table 2

Characteristics of the tumors.

	Conventional ESD	ESD with TTSPS	p value
Number of lesions	34	54
Location (U : M : L)	4 : 16 : 14	6 : 26 : 22	NS
Histological type	Adenoma: 10; Diff.: 22; Undiff.: 2	Adenoma: 12; Diff.: 36; Undiff.: 6	NS
Depth; (mucosal : submucosal)	26 : 8	36 : 18	NS
Macroscopic type; (depressed : nondepressed)	14 : 20	26 : 28	NS
Mean resected size; (mm) (range)	30; (14–60)	34; (16–55)	NS
En bloc resection rate (%)	97.1; (33/34)	100; (54/54)	NS

ESD: endoscopic submucosal dissection; NS: not significant; TTSPS: thread-traction method using a sheath of polypectomy snare; U: fundus; M: corpus; L: antrum and pylorus; diff.: differentiated adenocarcinoma; and undiff.: undifferentiated adenocarcinoma.