Lymph Node Dissection in Curative Gastrectomy for Advanced Gastric Cancer

Table 3

Extent of lymph node metastasis (𝑁)—Japanese classification and TNN classification.

𝑁; category	Japanese classification (JC: 13th edition)	TNM classification (6th edition)	JC (14th edition)/TNM (7th edition)
N0	No evidence of LN metastasis	No evidence of LN metastasis	No evidence of LN metastasis
N1	Metastasis to only Group 1 LN	Metastasis in 1 to 6 regional LNs	Metastasis in 1 to 2 regional LNs
N2	Metastasis to Group 2 LN, but no metastasis to Group 3 LN	7–15 nodes	3–6 nodes
N3	Metastasis to Group 3 LN	16 or more nodes	7 or more nodes; N3a: 7–15 nodes; N3b: 16 or more nodes

LN: lymph node.