| Age (years) † |
62.5 (39-83) |
| Race |
|
| White |
13 (81.3) |
| Other/Unknown |
3 (18.8) |
| Sex |
|
| Male |
7 (43.8) |
| Female |
9 (56.3) |
| Location |
|
| Femur |
8 (50) |
| Pelvis |
4 (25) |
| Ribs |
1 (6.3) |
| Periscapula |
1 (6.3) |
| Tibia |
1 (6.3) |
| Initial metastasis |
3 (18.8) |
| Initial biopsy |
14 (87.5) |
| Neoadjuvant chemotherapy |
2 (12.5) |
| Neoadjuvant radiation |
2 (12.5) |
| Surgery |
14 (87.6) |
| Limb salvage/wide resection |
13 (81.3) |
| Intralesional |
1 (6.3) |
| Size (cm) ‡ |
9.77 (5.02) |
| Negative margins |
|
| Yes |
12 (75) |
| No |
2 (12.5) |
| Missing |
2 (12.5) |
| Dedifferentiated component |
|
| Osteosarcoma |
5 (31.3) |
| UPS |
6 (37.5) |
| Rhabdomyosarcoma |
1 (6.3) |
| Low-grade dedifferentiation |
1 (6.3) |
| Mixed |
1 (6.3) |
| Reoperation |
6 (37.5) |
| Adjuvant chemotherapy |
5 (31.3) |
| Adjuvant radiation |
7 (43.8) |
| Follow-up (months) † |
18.5 (1-140) |
| Disease relapse |
15 (93.8) |
| Mortality |
13 (81.3) |