Table 1.

Distinction between curative and noncurative endoscopic resection of early gastric cancers.

Main features	Low risk (curative)	High risk (noncurative)
R0, intramucosal, well to moderately differentiated	– any size without ulceration, or – ≤30 mm with ulceration	– >30 mm with ulceration
R0, SM1, well to moderately differentiated	– ≤30 mm and – no lymphovascular invasion and – no ulcers	– >30 mm or – lymphovascular invasion or – with ulceration
R0, intramucosal, poorly differentiated	– ≤ 20 mm and – no lymphovascular invasion and – no ulcers	– >20 mm or – lymphovascular invasion or – with ulceration