Table 1.

Indication criteria adopted for gastric cancer endoscopic submucosal resection.

INTRAMUCOSAL CANCER	SUBMUCOSAL CANCER
Differentiated adenocarcinoma - No lymphatic-vascular invasion - Irrespective of tumor size without ulcer findings - Tumor less than 3 cm in size with ulcer findings	- Superficial submucosal invasion, < 500 μm (Sm1) - Differentiated adenocarcinoma - No lymphatic-vascular invasion - Tumor less than 3 cm in size
Undifferentiated adenocarcinoma - No lymphatic-vascular invasion - No ulcer findings - Tumor less than 2 cm in size