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Spinal Instability Neoplastic Score component validation using patient-reported outcomes.

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Mechanical pain is key for spinal instability, impacting disability and surgical outcomes. Higher Spinal Instability Neoplastic Score (SINS) in the indeterminate group predicts better surgical pain relief.

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Area of Science:

  • Orthopedics
  • Neurosurgery
  • Oncology

Background:

  • The Spinal Instability Neoplastic Score (SINS) is used to assess spinal tumors.
  • Understanding SINS component contributions to patient outcomes is limited.
  • Further analysis is needed to refine SINS utility in surgical decision-making.

Purpose of the Study:

  • To correlate SINS components with pre- and postoperative patient-reported outcomes (PROs).
  • To compare surgical outcomes between higher (10-12) and lower (7-9) SINS scores within the indeterminate group.

Main Methods:

  • Prospective data collection from 131 patients with metastatic spinal disease undergoing stabilization surgery.
  • Spearman rank correlation and Kruskal-Wallis tests analyzed SINS component associations with PROs.
  • Wilcoxon tests compared PROs between SINS score subgroups (7-9 vs 10-12).

Main Results:

  • Mechanical pain and metastatic location showed the strongest correlation with preoperative disability.
  • Blastic bone lesions were associated with greater pain reduction post-surgery.
  • Patients with SINS 10-12 experienced significantly greater improvements in pain and disability PROs compared to those with SINS 7-9.

Conclusions:

  • Mechanical pain is the primary driver of preoperative disability and postoperative improvement.
  • Radiographic SINS components correlate with symptom severity and surgical outcomes.
  • The indeterminate SINS group comprises distinct patient populations with varying surgical responses.