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Point assignment and prognostic score.
| Variable | OS nomogram | CSS nomogram |
| Age, yr | ||
| ≤18 | 0.0 | 0.0 |
| >18 | 4.8 | 4.3 |
| Extent of disease | ||
| Localized | 0.0 | 0.0 |
| Regional | 5.0 | 5.0 |
| Distant | 10.0 | 10.0 |
| Tumor size, cm | ||
| <5 | 0.0 | 0.0 |
| 5–10 | 2.4 | 2.3 |
| >10 | 4.8 | 4.5 |
| Surgical treatment | ||
| Yes | 0.0 | 0.0 |
| No | 3.6 | 3.3 |
