Endoscopic submucosal dissection for stomach neoplasms

Table 1 Frequency of lymph node metastases in early gastric cancer[20]

Criteria	Frequency (No. with metastasis/total number)	95% CI
Intramucosal cancer differentiated adenocarcinoma, no lymphatic vascular invasion, irrespective of ulcer findings, tumor ≤ 3 cm	0/1230	0-0.3%
Intramucosal cancer differentiated adenocarcinoma, no lymphatic vascular invasion, without ulcer findings, irrespective of tumor size	0/929	0-0.4%
Intramucosal cancer undifferentiated adenocarcinoma, no lymphatic vascular invasion, without ulcer findings, tumor ≤ 2 cm	0/141	0-2.6%
Cancer with minute submucosal penetration (≤ 500 μm) differentiated adenocarcinoma, no lymphatic vascular invasion, irrespective of ulcer findings, tumor ≤ 3 cm	0/145	0-2.5%