Abstract
Intradural spinal tumors present significant challenges due to involvement of critical motor and sensory tracts. Achieving maximal resection while preserving functional tissue is therefore crucial. Fluorescence-guided surgery aims to improve resection accuracy and is well studied for brain tumors, but its efficacy has not been fully assessed for spinal tumors. This meta-analysis aims to delineate the efficacy of fluorescence guidance in intradural spinal tumor resection. The authors performed a systematic review in four databases. We included studies that have utilized fluorescence agents, 5-aminolevulinic acid (5-ALA) or sodium fluorescein, for the resection of intradural spinal tumors. A meta-analysis was performed in accordance with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) statement. A total of 12 studies involving 552 patients undergoing fluorescence-guided intradural spinal tumor resection were included. Meningiomas demonstrated a 98% fluorescence rate and were associated with a homogenous florescence pattern; however, astrocytomas had variable fluorescence rate with pooled proportion of 70%. There was no significant difference in gross total resection (GTR) rates between fluorescein and 5-ALA (94% vs 84%, p = .22). Pre-operative contrast enhancement was significantly associated with intraoperative fluorescence with fluorescein. Intramedullary tumors with positive intraoperative fluorescence were significantly associated with higher GTR rates (96% vs 73%, p = .03). Utilizing fluorescence guidance during intradural spinal tumor resection holds promise of improving intraoperative visualization for specific intradural spinal tumors. Meningiomas and ependymomas have the highest fluorescence rates especially with sodium fluorescein; on the other hand, astrocytomas have variable fluorescence rates with no superiority of either agent. Positive fluorescence of intramedullary tumors is associated with a higher degree of resection.
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Data and materials used in this systematic review are available upon request.
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HA, CH, PG, PZ, RF, IA: conception and design, provision of study patient, data analysis and interpretation, manuscript writing, final approval of the manuscript. AA, OB, IA, AS: collection and assembly of data, data analysis and interpretation, manuscript writing. All authors: writing the manuscript.
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Supplementary Figure 1
Newcastle-Ottawa scale for non-randomized studies to determine the quality of the studies
Supplementary Figure 2
Funnel plots for determining the risk of publication bias.
Supplementary Figure 3
Forest plots showing pooled proportions of fluorescence with subgroup analysis based on the administered agent for ependymomas.
Supplementary Figure 4
Forest plots showing pooled proportions of fluorescence with subgroup analysis based on the administered agent for astrocytomas.
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Albalkhi, I., Shafqat, A., Bin-Alamer, O. et al. Fluorescence-guided resection of intradural spinal tumors: a systematic review and meta-analysis. Neurosurg Rev 47, 10 (2024). https://doi.org/10.1007/s10143-023-02230-x
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DOI: https://doi.org/10.1007/s10143-023-02230-x