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Anatomic stage/prognostic groups for cancer of the lung.
| Stage | T | N | M |
| Occult | Tx | N0 | M0 |
| 0 | Tis | N0 | M0 |
| IA | T1a | N0 | M0 |
| T1b | N0 | M0 | |
| IB | T2a | N0 | M0 |
| IIA | T2b | N0 | M0 |
| T1a | N1 | M0 | |
| T1b | N1 | M0 | |
| T2a | N1 | M0 | |
| IIB | T2b | N1 | M0 |
| T3 | N0 | M0 | |
| IIIA | T1a | N2 | M0 |
| T1b | N2 | M0 | |
| T2a | N2 | M0 | |
| T2b | N2 | M0 | |
| T3 | N1 | M0 | |
| T3 | N2 | M0 | |
| T4 | N0 | M0 | |
| T4 | N1 | M0 | |
| IIIB | T1a | N3 | M0 |
| T1b | N3 | M0 | |
| T2a | N3 | M0 | |
| T2b | N3 | M0 | |
| T3 | N3 | M0 | |
| T4 | N2 | M0 | |
| T4 | N3 | M0 | |
| IV | Any T | Any N | M1a |
| Any T | Any N | M1b |
