Table 1. The demographical and clinical characteristics in patients with primary GCTB around the knee.
| Categories | Number | Percentage |
|---|---|---|
| Total, n (%) | 410 | — |
| Men | 217 | 52.9 |
| Women | 193 | 47.1 |
| Age, years, mean (SD) | 35.7 (13.4) | — |
| Age group, n (%) | ||
| <20 years | 39 | 9.5 |
| 20–39 years | 235 | 57.3 |
| ≥ 40 years | 136 | 33.2 |
| Side, n (%) | ||
| Left Knee | 191 | 46.6 |
| Right Knee | 219 | 53.4 |
| Location, n (%) | ||
| Distal femur | 213 | 52.0 |
| Proximal tibia | 183 | 44.6 |
| Proximal fibular | 11 | 2.7 |
| Patella | 3 | 0.7 |
| Campanacci grade, n (%) | ||
| I | 52 | 12.7 |
| II | 160 | 39.0 |
| III | 198 | 48.3 |
| Pathologic fracture, n (%) | ||
| No | 271 | 66.1 |
| Yes | 139 | 33.9 |
| Surgical approach, n (%) | ||
| Intralesional curettage | 98 | 23.9 |
| Curettage combined with resection | 189 | 46.1 |
| En bloc marginal resection | 123 | 30.0 |
| PMMA, n (%) | ||
| Yes | 102 | 24.9 |
| No | 308 | 75.1 |
PMMA indicated polymethylmethacrylate.