Treatment of early gastric cancer in the Western World

Table 1 Survey of the literature on the rate of lymph node metastasis in surgically resected mucosal or submucosal pT1 gastric cancer in Europe

Ref.	Year	Origin	pT1a		pT1b
			n	% LNM	n	% LNM
Folli et al[11]	1995	Italy	117	4	106	23
Hayes et al[12]	1996	Germany	14	21	14	64
Bösing et al[13]	1998	Germany	33	9	24	17
Popiela et al[14]	2002	Poland	113	6	125	21
Roviello et al[15]	2006	Italy	330	5	322	24
Hölscher et al[10]	2009	Germany	47	11	79	25
Nieminen et al[4]	2009	Finland	47	2	43	23
Saragoni et al[5]	2013	Italy	308	6	221	26
		Europe	1009	5.9	934	24.3

LNM: Lymph node metastasis.