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Mayo staging
| Variables | I | II | III | IV |
|---|---|---|---|---|
| Mass lesion | Unicentric ≤3 cm | Unicentric≤3cm | Unicentric >3cm or multicentric | NA |
| Metastasis | - | - | + | Peritoneal (or another organ) metastasis |
| Vascular encasement | - | + | NA | NA |
| ECOG status | 0 | 1-2 | 0-2 | 3-4 |
| CA 19-9 level (U/ml) | <1000 | <1000 | ≥1000 | NA |
