Stage grouping of the eighth edition of the TNM classification of lung cancer
| Stage | T | N | M |
| Occult carcinoma | TX | N0 | M0 |
| 0 | Tis | N0 | M0 |
| IA1 | T1mi | N0 | M0 |
| T1a | N0 | M0 | |
| IA2 | T1b | N0 | M0 |
| IA3 | T1c | N0 | M0 |
| IB | T2a | N0 | M0 |
| IIA | T2b | N0 | M0 |
| IIB | T1a, b, c | N1 | M0 |
| T2a, b | N1 | M0 | |
| T3 | N0 | M0 | |
| IIIA | T1a, b, c | N2 | M0 |
| T2a, b | N2 | M0 | |
| T3 | N1 | M0 | |
| T4 | N0 | M0 | |
| T4 | N1 | M0 | |
| IIIB | T1a, b, c | N3 | M0 |
| T2a, b | N3 | M0 | |
| T3 | N2 | M0 | |
| T4 | N2 | M0 | |
| IIIC | T3 | N3 | M0 |
| T4 | N3 | M0 | |
| IVA | Any T | Any N | M1a |
| Any T | Any N | M1b | |
| IVB | Any T | Any N | M1c |
Reproduced and adapted with permission from [13].