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Stage grouping for head and neck cancers excluding nasopharynx, thyroid and mucosal melanoma
| Stage 0 | Tis | N0 | M0 |
| Stage I | T1 | N0 | M0 |
| Stage II | T2 | N0 | M0 |
| Stage III | T1, T2, T3 | N1 | M0 |
| T3 | N0 | M0 | |
| Stage IVA | T1, T2, T3 | N2 | M0 |
| T4a | N0, N1, N2 | M0 | |
| Stage IVB | Any T | N3 | M0 |
| T4b | Any N | M0 | |
| Stage IVC | Any T | Any N | M1 |
