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. 2022 Jun 7;95(1135):20211300. doi: 10.1259/bjr.20211300

Table 3.

Components of SINS

Components of SINS
Components SINS*
Location within the spine

  • Junctional (Occiput-C2, C7-T2, T11-L1 & L5-S1)

  • Mobile (C3-C6 & L2-L4)

  • Semi-rigid (T3-T10)

  • Rigid (S2-S5)

 3
2
1
0
Bone lesion quality

  • Lytic

  • Mixed lytic/Blastic

  • Blastic

 2
1
0
Vertebral body collapse

  • >50% collapse

  • <50% collapse

  • No collapse with >50% vertebral body involved

  • None of the above

 3
2
1
0
Pain relief with recumbence & pain with movement or loading of the spine

  • Yes

  • No (occasional pain not mechanical)

  • Pain free

 2
1
0
Radiographic spinal alignment

  • Subluxation or translation present

  • De novo deformity (kyphosis &/or scoliosis)

  • Normal alignment

 2
1
0
Posterolateral involvement of spinal elements (facet, pedicle or costovertebral joint fracture or replacement with tumor)

  • Bilateral

  • Unilateral

  • None of the above

 2
1
0

SINS, Spine Instability Neoplastic Score.