Reclassification of the staging schema in vulvar cancer
| 2009 schema | 2021 schema | Stage change |
| IIIA1 (≥5 mm) | IIIB (>5 mm) | Upstaged |
| IIIA (5 mm) | No | |
| IIIA2 (<5 mm) | IIIA (<5 mm) | No |
| IIIB1 (≥5 mm) | IIIB (>5 mm) | No |
| IIIA (5 mm) | Downstaged | |
| IIIB2 (<5 mm) | IIIA (<5 mm) | Downstaged |
| IIIC | IIIC | No |
| IVA1 | IIIA (non-osseous*) | Downstaged |
| IVA (osseous†) | No | |
| IVA2 | IVA | No |
| IVB | IVB | No |
| Eleven substages | Eight substages | Reduced by three substages |
Synoptic description of the FIGO 2021 schema is shown in Online supplemental table S1.
*Upper urethral, vaginal mucosa, bladder mucosa, or rectal mucosal invasion.
†Fixed to pelvic bone.
FIGO, International Federation of Gynecology and Obstetrics.