TABLE 2.
Occurrence and distribution of MLNM by lymph node stations and zones for the entire cohort stratified by tumor location (N = 1661)
| Stations/zones | Lymph node metastatic rate % (involved/resected) | p | |||
|---|---|---|---|---|---|
| Total | RUL | RML | RLL | ||
| Station 2R | 11.6 (176/1516) | 13.2 (108/817) | 13.0 (24/184) | 8.5 (44/515) | 0.028 |
| Station 3A | 11.3 (57/503) | 12.7 (33/259) | 17.7 (14/79) | 6.1 (10/165) | 0.016 |
| Station 4R | 17.1 (233/1365) | 21.6 (160/742) | 14.6 (25/171) | 10.6 (48/452) | <0.001 |
| Station 7 (SC zone) | 12.5 (208/1661) | 3.3 (29/878) | 22.0 (45/205) | 23.2 (134/578) | <0.001 |
| Station 8 | 3.7 (7/189) | 1.2 (1/86) | 0 (0/20) | 7.2 (6/83) | 0.045 a |
| Station 9 | 4.5 (35/780) | 0.8 (3/377) | 2.8 (2/72) | 9.1 (30/331) | <0.001 |
| Upper zone | 19.1 (316/1651) | 23.8 (208/873) | 20.5 (42/205) | 11.5 (66/573) | <0.001 |
| Lower zone | 4.6 (40/877) | 1.0 (4/420) | 2.3 (2/88) | 9.2 (34/369) | <0.001 |
Abbreviations: MLNM, mediastinal lymph node metastasis; RUL, right upper lobe; RML, right middle lobe; RLL, right lower lobe.
a
Fisher's exact test.