Prediction of the indication criteria for endoscopic resection of early gastric cancer

Table 4 Lymph node metastasis according to the presence of ulcer, differentiation, lymphovascular invasion, and the depth of invasion in early gastric cancer patients

Ulcer	Differentiation	VI	LI	Size
				≤10 mm	> 10 mm	> 20 mm	> 30 mm
M
Ulcer negative	Differentiated	No	No	0/102	2/112	0/81	1/57
			Yes	0/5	0/2	0/1	0/5
		Yes	No	0	0	0	1/2
			Yes	0	1/2	0/0	1/2
	Undifferentiated	No	No	1/66	2/41	0/41	1/45
			Yes	0/3	0/3	0/1	0/2
		Yes	No	0	0	0	0
			Yes	0	0	0/1	3/3
Ulcer positive	Differentiated	No	No	1/59	1/104	0/67	1/47
			Yes	0/5	1/12	0/1	1/5
		Yes	No	0	0	0	0
			Yes	0/2	0/4	0/0	1/1
	Undifferentiated	No	No	0/40	0/50	1/42	0/46
			Yes	0/4	0/2	0/6	1/4
		Yes	No	0	0	0	0
			Yes	0/1	1/2	0/1	1/1
SM1
Ulcer negative	Differentiated	No	No	0/10	1/19	0/12	1/13
			Yes	0/3	0/3	1/2	0/1
		Yes	No	0	0	1/1	2/2
			Yes	0	1/3	0/0	1/3
	Undifferentiated	No	No	0/7	0/6	1/8	0/6
			Yes	0	0/2	0/0	0/1
		Yes	No	0	0	0	0
			Yes	0	0/1	0/1	2/3
Ulcer positive	Differentiated	No	No	0/14	2/24	0/19	1/13
			Yes	0/1	0/0	1/7	1/5
		Yes	No	0	0/1	0/0	0
			Yes	0	0/1	2/3	3/3
	Undifferentiated	No	No	0/6	2/12	2/7	1/6
			Yes	0/2	1/7	0/3	1/7
		Yes	No	0	0	0	1/1
			Yes	1/2	3/5	1/4	1/1
SM2
Ulcer negative	Differentiated	No	No	0/4	2/23	1/25	0/18
			Yes	0	1/12	2/5	11/27
		Yes	No	0/1	0/0	0/0	0
			Yes	0/1	1/3	0/1	6/8
	Undifferentiated	No	No	0/1	1/14	2/9	1/4
			Yes	0/2	1/1	0/2	3/7
		Yes	No	0/1	0/0	0/0	0
			Yes	0/1	0/0	5/6	1/3
Ulcer positive	Differentiated	No	No	3/16	2/33	1/31	3/31
			Yes	0/3	5/15	12/27	13/31
		Yes	No	0	0	1/3	0/3
			Yes	0/1	1/2	2/5	4/5
	Undifferentiated	No	No	0/4	2/14	1/19	4/18
			Yes	0/2	1/8	1/6	4/11
		Yes	No	0	0	0/1	1/1
			Yes	1/1	3/4	5/8	3/5