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Musculoskeletal Tumour Society staging system
| Stage | Grade | Local extent | Metastases |
|---|---|---|---|
| IA | G1 | T1 | M0 |
| IB | G1 | T2 | M0 |
| IIA | G2 | T1 | M0 |
| IIB | G2 | T2 | M0 |
| III | G1 or G2 | T1 or T2 | M1 |
G1, low grade; G2, high grade; T1, tumour is intracompartmental; T2, extracompartmental; M0, no regional or distant metastases; M1, metastases
