| TNM | FIGO | |
| Tis | 0 | Carcinoma in Situ |
| T1 | I | confined to the vulva, 2cm or less |
| T1a | IA | stromal invasion no greater than 1mm |
| T1b | IB | stromal invasion over 1mm |
| T2 | II | confined to vulva more than 2 cm |
| T3 | III | spread to lower urethra, vagina or anus |
| T4 | IV | upper urethra, bladder mucosa, rectal mucosa, fixed to pubic bone |
| N0 | no nodes | |
| N1 | III | unilateral regional nodes |
| N2 | IVA | bilateral regional nodes |
| Stage O | Tis | N0 | M0 |
| Stage I | T1 | N0 | M0 |
| Stage IA | T1a | N0 | M0 |
| Stage IB | T1b | N0 | M0 |
| Stage II | T2 | N0 | M0 |
| Stage III | T3 | N1 | M0 |
| Stage IVA | T4 | N2 | M0 |
| Stage IVB | any T | any N | M1 |