Table 2. Indications for gastric ESD according to Japanese Gastric Cancer Association guidelines.

	Absolute indications	Expanded indications
		A	B	C
Histologic type	Differentiated	Differentiated	Differentiated	Undifferentiated
Tumor size (mm)	≤20	>20	≤30	≤20
Ulceration	Negative	Negative	Positive	Negative
Depth of invasion	T1a	T1a	T1a	T1a

ESD, endoscopic submucosal dissection.