Table 2 Treatment characteristics
Variable | Numbers |
|---|---|
Number of treated lesions | 75 |
Histology of lesions | |
Osteosarcoma | 43 (57.3%) |
Chondrosarcoma | 3 (4.0%) |
Ewing’s sarcoma | 2 (2.7%) |
Soft tissue sarcoma | 27 (36.0%) |
Spinal disease status | |
Primary | 6 (8.0%) |
Metastasis | 69 (92.0%) |
Prior local therapy | |
Any surgery | 16 (21.3%) |
External beam radiotherapy | 2 (2.7%) |
Site of lesions | |
Cervical | 11 (14.7%) |
Thoracic | 34 (45.3%) |
Lumbar | 18 (24.0%) |
Sacral | 12 (16.0%) |
Treated vertebral level | |
Single | 60 (80.0%) |
2–3 | 15 (20.0%) |
Extent of disease at the time of treatment | |
Solitary spine involvement | 15 (20.0%) |
Multiple bone metastases | 11 (14.7%) |
Visceral metastases | 49 (74.5%) |
Median dose, Gy (range) | 33 (18–45) |
Median BED, Gy5 (range) | 100 (60–180) |
Fractionation | |
Single | 12 (16.0%) |
2–5 fx | 63 (84.0%) |
Median PTV, cc (range) | 16.0 (1.3–163.6) |