Version July 2025
| Stage | Tumor size (cm) | Mitotic rate | Observed rate of progressive disease |
| Stage IA | ≤5 | Low | 0 to 4% |
| Stage II | >5 to 10 | Low | 24% |
| Stage IIIA | >10 | Low | 52% |
| ≤2 | High | 50% | |
| Stage IIIB | >2 to 5 | High | 73% |
| >5 to 10 | High | 85% | |
| >10 | High | 90% |
