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American Joint Committee on Cancer (AJCC) staging system
| AJCC, 6th edition |
AJCC, 7th edition |
||||||
|---|---|---|---|---|---|---|---|
| Stage | T | N | M | Stage | T | N | M |
| 0 | is | 0 | 0 | 0 | is | 0 | 0 |
| Ia | 1 | 0 | 0 | I | 1 | 0 | 0 |
| Ib | 2 | 0 | 0 | – | |||
| IIa | 3 | 0 | 0 | II | 2 | 0 | 0 |
| IIb | 1–3 | 1 | 0 | – | |||
| III | 4 | Any | 0 | IIIa | 3 | 0 | 0 |
| – | – | IIIb | 1–3 | 1 | 0 | ||
| IV | Any | Any | 1 | IVa | 4 | Any | 0 |
| – | IVb | Any | 2 | 0 | |||
| – | Any | Any | 1 | ||||
