Table 1. Characteristics of the study patients.
| Characteristic | No. |
| Follow up period (months) | 49.5 (6–190) |
| Age at diagnosis (y) | 22.1 (5–69) |
| <40 | 68 |
| ≥40 | 14 |
| Gender | |
| Male | 48 |
| Female | 34 |
| Primary tumor location | |
| Femur | 48 |
| Tibia | 21 |
| Humerus | 5 |
| Pelvis | 4 |
| Other | 4 |
| Pathologic subtype | |
| Osteoblastic | 58 |
| Chondroblastic | 16 |
| Fibroblastic | 4 |
| Other | 4 |
| Surgical approach | |
| Limb salvage | 78 |
| Amputation | 4 |
| Surgical stage | |
| IIA | 2 |
| IIB | 52 |
| IIIB | 28 |
| Huvos grade | |
| I (<50% necrosis) | 8 |
| II (50–89% necrosis) | 24 |
| III (≥90% necrosis) | 20 |
| IIIB (100% necrosis) | 30 |