Chest ImagingLung cancer stage grouping
refers to the recent revisions in grouping of the TNM subsets in the international system for staging
lung cancer to provide greater specifity for identifying patient groups with similar prognoses and treatment options (Table 1) (
lung cancer staging).
Lung cancer stage grouping, Table 1. TNM subsets. Mountain CF, Chest 1997; 111:1712
| Stage | TNM Subsets |
| 0 | Carcinoma in situ |
| IA | T1N0M0 |
| IB | T2N0M0 |
| IIA | T1N1M0 |
| IIB | T2N1M0 |
| T3N0M0 |
| IIIA | T3N1M0 |
| T1-T3N2M0 |
| IIIB | T1-T4N3M0 |
| T4N0-N2M0 |
| IV | Any T Any M1 |
PG