| stage | before | after |
| tumour stage |
|
|
| T0 | 0 | 6 |
| T1 | 0 | 8 |
| T2 | 6 | 6 |
| T3 | 23 | 11 |
| T4A | 3 | 1 |
| Node stage |
|
|
| N0 | 0 | 15 |
| N1 | 16 | 12 |
| N2 | 12 | 5 |
| N3 | 4 | 0 |