Table 4. Pooled lymph node metastasis rates (%) in lymph node subgroups defined by JSED.

Order of rates	TOC		Upper TOC		Middle TOC		Lower TOC
	Subgroup	%	Subgroup	%	Subgroup	%	Subgroup	%
1	Paratracheal	31.7	Paratracheal	43.3	Paraoesophageal	28.7	Perigastric	47.9
2	Perigastric	30.0	106recR	35.6	Perigastric	26.3	1+2	42.4
3	Paraoesophageal	28.4	101	23.3	108	23.6	7	36.3
4	106recR	24.3	105	20.5	106recR	23.0	Paraoesophageal	34.8
5	7	22.6	101R	18.5	Paratracheal	20.1	1	33.4
6	1	22.4	104	18.0	7	19.7	2	27.9
7	1+2	18.3	106recL	17.7	107	18.6	3	27.6
8	107	16.7	Paraoesophageal	16.9	1	17.6	110	22.6
9	2	16.4	106	15.2	1+2	16.6	Paratracheal	18.2
10	104	15.7	106pre	13.2	109	12.9	9	14.4
11	109	13.8	101L	13.0	106	12.0	108	12.7
12	3	13.0	107	11.5	2	11.8	10	12.6
13	110	11.8	109	11.4	3	10.8	107	12.4
14	106recL	11.5	108	11.2	110	10.4	106recR	12.1
15	101	11.0	106tbL	9.6	101	9.9	112	11.8
16	112	10.3	Perigastric	8.4	104	9.7	11	8.3
17	105	8.2	1+2	7.7	105	7.5	101	7.7
18	101R	7.4	104R	7.7	112	7.5	4	6.7
19	106pre	6.5	110	6.2	106recL	7.1	109	6.5
20	106tbL	6.5	1	5.3	101R	6.6	111	5.8
21	109R	5.8	104L	5.3	104R	5.6	104	5.6
22	11	5.6	10	5.3	101L	5.2	106tbL	5.1
23	101L	5.4	7	4.8	104L	5.1	101R	4.4
24	9	5.2	9	4.7	106pre	4.9	109R	4.4
25	104L	4.7	102L	4.3	11	4.8	106recL	3.9
26	104R	4.6	2	4.2	109L	4.2	105	3.8
27	106	4.4	112	3.9	106tbL	3.7	109L	3.7
28	109L	3.7	102R	3.4	9	3.7	104R	3.3
29	8	3.7	3	3.2	109R	3.7	106pre	3.2
30	102R	2.9	109R	3.0	8	3.2	101L	3.1
31	102L	2.8	11	2.7	102R	2.2	106	3.0
32	108	2.0	109L	2.6	102L	1.3	104L	3.0
33	111	1.8	111	2.5	111	1.2	102R	2.0
34	10	1.8	8	1.4	10	1.0	102L	1.7
35	4	0.9	4	0	4	0.6	8	0.8

JSED, Japanese Society for Esophageal Diseases; LNMR, lymph node metastasis rate; TOC, thoracic oesophageal cancer.