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AJCC Staging for bone sarcomas
| Stage | Grade | Size | Metastases |
|---|---|---|---|
| IA | Low | < 8 cm | None |
| IB | Low | > 8 cm | None |
| IIA | High | < 8 cm | None |
| IIB | High | > 8 cm | None |
| III | Any grade | Any | Skip metastasis |
| IVA | Any grade | Any | Pulmonary metastases |
| IVB | Any grade | Any | Nonpulmonary metastases |
