Research Article
Evaluation of Risk Factors for Vertebral Compression Fracture after Carbon-Ion Radiotherapy for Primary Spinal and Paraspinal Sarcoma
Table 2
Baseline SINS classification according to VCF status.
| SINS component | VCF | No VCF |
| Location | | | Junctional | 3 | 4 | Mobile spine | 3 | 5 | Semi-rigid | 1 | 3 | Rigid | 0 | 11 | Pain | | | mechanical | 5 | 2 | occasional and nonmechanical | 2 | 13 | pain free | 0 | 8 | Bone lesion | | | lytic | 5 | 19 | mixed | 2 | 4 | blastic | 0 | 0 | Radiographic spinal alignment | | | subluxation or translation | 0 | 0 | kyphosis or scoliosis | 3 | 0 | normal | 4 | 23 | Vertebral body collapse | | | ≥50% | 0 | 0 | <50% | 2 | 1 | no collapse but >50% involved | 4 | 14 | none of the above | 1 | 8 | Posterolateral involvement of spinal element | | | bilateral | 0 | 2 | unilateral | 7 | 15 | none of the above | 0 | 6 | SINS classification | | | unstable (score of 13–16) | 1 | 0 | potentially unstable (7–12) | 5 | 6 | stable (0–6) | 1 | 17 |
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