• Neurosurgery · Aug 2023

    Fractionated Radiotherapy After Gross Total Resection of Clival Chordoma: A Systematic Review of Survival Outcomes.

    • Julian L Gendreau, HameedN U FarrukhNUFDepartment of Neurosurgery, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania, USA., Adrian Jimenez, Sachiv Chakravarti, Yusuf Mehkri, and Debraj Mukherjee.
    • Department of Neurosurgery, Johns Hopkins School of Medicine, Baltimore, Maryland, USA.
    • Neurosurgery. 2023 Aug 1; 93 (2): 257266257-266.

    BackgroundCurrent treatment guidelines for clival chordomas recommend surgical resection followed by high-dose radiotherapy (RT). However, in patients in whom gross total resection (GTR) is achieved, the benefits of additional RT remain unclear.ObjectiveTo investigate whether RT offers any benefit to progression-free survival (PFS) in patients undergoing GTR of clival chordoma by performing a systematic review of all currently published literature.MethodsA total of 5 databases were searched to include all studies providing data on GTR ± RT for clival chordomas (January 1990-June 2021). Qualitative assessment was performed with Newcastle-Ottawa Scale guidelines for assessing quality of nonrandomized studies. Statistical analysis using individualized patient data of PFS was performed.ResultsThe systematic search yielded 2979 studies, weaned to 22 full-text articles containing 108 patients. All patients underwent GTR of clival chordoma, with 46 (43%) patients receiving adjuvant RT. Mean PFS for RT patients was 31.09 months (IQR: 12.25-37.75) vs 54.92 months (IQR: 14.00-85.75) in non-RT patients. Overall, RT did not increase PFS (HR 0.320, P = .069) to a value that achieved statistical significance. Stratifying by photon therapy vs particle beam therapy yielded no statistically significant benefit for particle beam therapy for PFS ( P = .300). Of patients with age ≥65 years, RT did not improve outcomes to statistical significance for PFS (HR 0.450, P = .481). Patients age ≥65 years had lower PFS on both bivariate analysis (HR 3.708, P = .007) and multivariate analysis (HR 3.322, P = .018).ConclusionAfter achieving GTR of clival chordoma, fractionated RT offers unclear benefit upon survival outcomes.Copyright © Congress of Neurological Surgeons 2023. All rights reserved.

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