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 componentVCF No VCF

Location
 Junctional34
 Mobile spine35
 Semi-rigid13
 Rigid011
Pain
 mechanical52
 occasional and nonmechanical213
 pain free08
Bone lesion
 lytic519
 mixed24
 blastic00
Radiographic spinal alignment
 subluxation or translation00
 kyphosis or scoliosis30
 normal423
Vertebral body collapse
 ≥50%00
 <50%21
 no collapse but >50% involved414
 none of the above18
Posterolateral involvement of spinal element
 bilateral02
 unilateral715
 none of the above06
SINS classification
 unstable (score of 13–16)10
 potentially unstable (7–12)56
 stable (0–6)117