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AGES classification system.
| Prognostic score = 0.05 × age (if age !40) |
| +1 (if grade 2) |
| +3 (if grade 3 or 4) |
| +1 (if extrathyroidal) |
| +3 (if distant spread) |
| +0.2 × tumor size (cm maximum diameter) |
| Survival by AGES score |
| 3.99 = 99% |
| 4–4.99 = 80% |
| 5–5.99 = 67% |
| 5–6 = 13% |
