TABLE 2.
Characteristics of 27 OS patients with matched pre–neoadjuvant and post–neoadjuvant chemotherapy samples
| Variables | N (%) |
|---|---|
| Age at diagnosis, y | |
| <14 | 13 (48.1) |
| ≥14 | 14 (51.9) |
| Gender | |
| Male | 18 (66.7) |
| Female | 9 (33.3) |
| Enneking stage | |
| IIA | 1 (3.7) |
| IIB | 22 (81.5) |
| III | 4 (14.8) |
| Cycles of neoadjuvant chemotherapy | |
| 3 | 2 (7.4) |
| 4 | 16 (59.3) |
| 5 | 1 (3.7) |
| 6 | 8 (29.6) |
| Treatment response | |
| PR | 8 (29.7) |
| SD | 9 (33.3) |
| PD | 5 (18.5) |
| NA | 5 (18.5) |
Abbreviations: NA, not available; OS, osteosarcoma; PD, progressive disease; PR, partial response; SD, stable disease.