Table 1.
Baseline data of 115 cases of pelvic osteosarcoma
| Variables | Value |
|---|---|
| Gender [N (%)] | |
| Male | 63 (54.8%) |
| Female | 52 (45.2%) |
| Age (yr, mean ± SD) | 31.0 ± 14.8 |
| Height (cm, mean ± SD) | 168.6 ± 8.8 |
| Weight (kg, mean ± SD) | 61.3 ± 13.5 |
| BMI (kg/m2, mean ± SD) | 21.5 ± 3.9 |
| Onset duration (mo, mean ± SD) | 9.2 ± 14.9 |
| Histological subtype [N (%)] | |
| Chondroblastic | 34 (29.6%) |
| Well‐differentiated with dedifferentiation | 11 (9.6%) |
| Osteoblastic | 19 (16.5%) |
| Fibroblastic | 11 (9.6%) |
| Telangiectatic | 2 (1.7%) |
| Small cell | 6 (5.2%) |
| Epithelioid | 1 (0.9%) |
| Not otherwise specified | 31 (27.0%) |
| Enneking staging for primary tumor [N(%)] | |
| IIA | 5 (4.3%) |
| IIB | 83 (72.2%) |
| III | 27 (23.5%) |
| Classification of pelvic tumor [N(%)] | |
| Type I | 6 (5.2%) |
| Type II | 1 (0.9%) |
| Type III | 1 (0.9%) |
| Type II+III | 15 (13%) |
| Type II+III+proximal femur | 3 (2.6%) |
| Type I+II | 15 (13%) |
| Type I+II+proximal femur | 1 (0.9%) |
| Type I+II+III | 15 (13%) |
| Type I+II+III+poximal femur | 2 (1.7%) |
| Type I+IV | 23 (20%) |
| Type I+II+IV | 17 (14.8%) |
| Type I+II+III+IV | 15 (13%) |
| Type I+II+III+IV+proximal femur | 1 (0.9%) |
| Greatest diameter of the tumor (mm, mean ± SD) | 112.7 ± 36.6 |
| Metastasis at presentation [N (%)] | |
| Lung | 24 (20.9%) |
| Lymph node | 5 (4.3%) |
| Other sites | 3 (2.6%) |
| Venous tumor thrombus at presentation [N (%)] | 17 (14.8%) |