Table 1. Patient characteristics and outcomes in the two groups.
| Characteristics | Non-internal fixation group (n=18) |
Internal fixation group (n=19) |
P |
|---|---|---|---|
| Male | 14 (77.8) | 16 (84.2) | 0.693 |
| Age at diagnosis, years | 6.5±3.1 | 7.6±2.6 | 0.295 |
| Follow-up, years | 4.8±2.3 | 4.3±2.4 | 0.534 |
| Fracture at diagnosis | 6 (33.3) | 7 (36.8) | 1.000 |
| Active cyst (<5 mm from the physis) | 4 (22.2) | 4 (21.1) | 1.000 |
| Cyst area, mm2 | 936±597 | 1609±1131 | 0.031* |
| Healing time of fracture, months | 2.2±0.5 | 2.6±0.4 | 0.159 |
| Healing time of cyst, months | 5.5±1.9 | 5.7±1.8 | 0.863 |
| MSTS | 0.896† | ||
| Excellent | 10 (55.5) | 8 (42.1) | |
| Good | 3 (16.7) | 4 (21.1) | |
| Fair | 2 (11.1) | 4 (21.1) | |
| Poor | 3 (16.7) | 3 (15.7) | |
| Capanna classification | 0.657† | ||
| Healed | 10 (55.5) | 7 (36.8) | |
| Healed with residual | 3 (16.7) | 5 (26.3) | |
| Recurrence | 5 (27.8) | 6 (31.6) | |
| No response | 0 (0.0) | 1 (5.3) | |
| Time to activity, months | 7.7±1.7 | 5.9±1.2 | 0.006* |
| Complications | 1.000 | ||
| Malunion with coxa vara | 1 (5.6) | 1 (5.3) | |
| Leg length discrepancy | 1 (5.6) | 2 (10.5) | |
| Avascular necrosis | 0 (0.0) | 0 (0.0) | |
| Refracture | 1 (5.6) | 0 (0.0) |
Data were presented as mean±sd or n (%).
*
Statistically significant p<0.05.
†
Fisher’s exact tests.
MSTS, Musculoskeletal Tumor Society.