Table 1.

Relationship between endoscopic performance and postoperative lesion depth [n (%)].

Item	Mucosal layer and mucosa (n = 116)	Submucosal layer even deeper (n = 5)
LGIN	8 (6.90)	0 (0)
HGIN	75 (64.65)	0 (0)
Adenocarcinoma	33 (28.45)	5 (100.00)
Concurrent ulcer	16 (13.79)	3 (60.00)
Spontaneous hemorrhage	17 (14.66)	3 (60.00)
Peripheral fold accumulation	3 (2.59)	2 (40.00)
nonextension sign positive	10 (8.62)	2 (40.00)
Mucosal bridge formation	0 (0)	2 (40.00)

LGIN = low-grade intraepithelial neoplasia, HGIN = high-grade intraepithelial neoplasia.