A concise summary table of the Spinal Instability Neoplastic Score (SINS), which is used to assess spinal stability in patients with spinal metastases.
| Category | Criteria | Score |
|---|---|---|
| Location | Junctional (occiput–C2, C7–T2, T11–L1, L5–S1) | 3 |
| Mobile spine (C3–C6, L2–L4) | 2 | |
| Semi-rigid (T3–T10) | 1 | |
| Rigid (S2–S5) | 0 | |
| Pain | Yes, mechanical (movement-related) | 3 |
| Yes, but not mechanical | 1 | |
| No pain | 0 | |
| Bone lesion quality | Lytic | 2 |
| Mixed (lytic/blastic) | 1 | |
| Blastic | 0 | |
| Radiographic alignment | Subluxation or translation | 4 |
| Deformity (kyphosis/scoliosis) | 2 | |
| Normal alignment | 0 | |
| Vertebral body collapse | > 50% collapse | 3 |
| < 50% collapse | 2 | |
| No collapse, but > 50% vertebral body involved | 1 | |
| No collapse | 0 | |
| Posterolateral involvement | Bilateral pedicle/lamina involvement | 3 |
| Unilateral involvement | 1 | |
| None | 0 |
Interpretation: 0–6 points: stable; 7–12 points: indeterminate (possibly unstable); 13–18 points: unstable.
OA: Conceptualization, Investigation, Formal analysis, Writing—original draft, Data curation, Writing—review & editing. M Subih: Conceptualization, Investigation, Formal analysis, Writing—original draft, Data curation, Writing—review & editing. LS: Conceptualization, Investigation, Formal analysis, Writing—original draft. M Stublla: Conceptualization, Investigation, Formal analysis, Writing—original draft, Data curation, Writing—review & editing. DB: Writing—review & editing. PT: Conceptualization, Investigation, Formal analysis, Writing—original draft, Data curation, Writing—review & editing. OS: Writing—review & editing. AEEAE: Writing—review & editing. All authors read and approved the submitted version.
Patricia Tai, who is the Editorial Board Member and Guest Editor of Exploration of Medicine, and Omar Alqaisi, who is the Guest Editor of Exploration of Medicine, had no involvement in the decision-making or the review process of this manuscript. The other authors declare no conflicts of interest.
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