Tumor site and initial stage (patient level)
| Site/Stage | % (No.) |
|---|---|
| Primary site | |
| Oropharynx | 43.2% (124) |
| Larynx | 22.3% (64) |
| Oral cavity | 25.4% (73) |
| Hypopharynx | 4.2% (12) |
| Skin | 2.1% (6) |
| Unknown | 2.8% (8) |
| Primary stage | |
| Tx | 7.7% (22) |
| Tis | 0.3% (1) |
| T1 | 16.4% (47) |
| T2 | 25.4% (73) |
| T3 | 12.2% (35) |
| T4a | 32.8% (94) |
| T4b | 4.2% (12) |
| T4 | 0.8% (3) |
| Nodal stage | |
| Nx | 4.5% (13) |
| N0 | 28.9% (83) |
| N1 | 11.8% (34) |
| N2a | 3.1% (9) |
| N2b | 33.8% (97) |
| N2c | 16.4% (47) |
| N3 | 1.4% (4) |
| Distant stage | |
| M0 | 97.9% (281) |
| M1 | 2.1% (6) |