Table 1.

Criteria for endoscopic therapy (adapted from the Japanese Gastric Cancer Treatment Guidelines [20])

Absolute criteria (must fulfill all of the following)	Expanded criteria
Adenocarcinoma of differentiated histological type	cT1a plus one of the following:
No evidence of ulceration	Differentiated adenocarcinoma without evidence of ulceration ≤2 cm in diameter
Clinically assessed as T1a (cT1a) (confined to the mucosa)	Differentiated adenocarcinoma with evidence of ulceration but ≤3 cm in diameter
Diameter ≤2 cm	Undifferentiated type without evidence of ulceration and ≤2 cm in diameter.