Abstract
Spinal stabilization surgery is an integral part of the treatment of spinal metastatic disease. Bony fusion is the hallmark of spinal stabilization in non-oncology patients. Spinal oncology patients are unlikely to achieve bony fusion because of their overall prognosis and concurrent therapies. Stabilization surgery without fusion may be a reasonable approach for these patients. Literature evaluating the effectiveness of this approach is limited. The object of this study was to investigate the rate of instrumentation failure in patients undergoing posterior spinal instrumented stabilization without fusion for spinal metastatic disease. Data from consecutive cases of spinal surgery at our institution during an 81-month period were reviewed. Demographics, clinical notes, and computed tomography findings were recorded and used to evaluate instrumentation failures. Patients who underwent separation surgery that included laminectomy and posterior spinal instrumentation without fusion for spinal metastatic disease and had follow-up computed tomography scans >3 months postoperatively were selected for the study. Twenty-seven patients were included in the study. Mean age was 64.85 ± 6.53 years. Nine patients were women. A mean of 1.61 ± 0.96 laminectomy levels was performed. A mean of 8.26 ± 1.48 screws was inserted. The mean postoperative discharge date was 5.07 ± 1.47 days. Mean follow-up duration was 12.17 ± 11.73 months. None of the patients had a change in instrumentation position, pedicle screw pullout, change in spinal alignment, or progressive deformity. No patient required reoperation or instrumentation revision or replacement. Our experience suggests that instrumented spinal stabilization without fusion is an acceptable approach for patients with spinal metastatic disease.
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