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MACIS scoring and staging
| MACIS Score components | |
|---|---|
| Metastases | 3 if distant spread |
| Age | 3.1 (if age <40 years) or 0.08 × age (if age ≥ 40 year) |
| Completeness of Resection | 1 if incompletely resected, 0 otherwise |
| Invasion (local) | 1 if locally invasive, 0 otherwise |
| Size | 0.3 × tumor size (cm maximum diameter) |
| MACIS stage | MACIS score threshold |
| Stage 1 | <6 |
| Stage 2 | 6–6.99 |
| Stage 3 | 7–7.99 |
| Stage 4 | ≥8 |
