| Stage | n (%) |
| T stage | |
| Tis | 13 (7.8) |
| T1 | 19 (11.4) |
| T2 | 21 (12.7) |
| T3 | 89 (53.6) |
| T4 | 11 (6.6) |
| Tx | 13 (7.8) |
| Total | 166 (100.0) |
| N stage | |
| N0 | 102 (61.4) |
| N1 | 26 (15.7) |
| N2 | 29 (17.5) |
| Nx | 9 (5.4) |
| Total | 166 (100.0) |
| M Stage | |
| M0 | 103 (62.0) |
| M1 | 31 (18.7) |
| Mx | 32 (19.3) |
| Total | 166 (100.0) |
| AJCC stage | |
| 0 | 13 (7.8) |
| I | 34 (20.5) |
| II | 50 (30.1) |
| III | 33 (19.9) |
| IV | 31 (18.7) |
| Unknown | 5 (3.0) |
| Total | 166 (100.0) |
Five tumours were not classifiable under AJCC stage: two were TxN0M0, two were TxNxMx, and one was TxNxM0.
AJCC, American Joint Committee on Cancer.