Abstract
Purpose
Extraneural meningioma metastasis is a rare occurrence and may pose a clinical challenge due to its unclear prognosis. In this systematic review, we analyze patient demographics, clinical characteristics, management strategies, and outcomes.
Methods
PubMed, EMBASE, Scopus, Cochrane, and Web of Science databases were searched from inception to February 23, 2024 for cases of metastatic meningioma according to PRISMA guidelines. Descriptive statistics, Mann–Whitney U test, Fisher's exact tests, Kaplan–Meier curves, and log-rank tests were used for selected analyses.
Results
A total of 288 patients (52% male) were included with an average age of 49 years at meningioma diagnosis. Tumors were distributed across WHO grade 1 (38%), 2 (36%), and 3 (26%). Most patients experienced intracranial recurrence (79%) and mean time to first metastasis was approximately 8 years. No change in WHO grade between primary and metastasis was observed for most cases (65%). Treatment of the initial metastasis was most often with surgery (43%), chemotherapy (20%), or no treatment (14%). Half of the patients were alive (50%) with an average follow-up of 3 years following metastasis. Overall median survival was 36 months for the entire cohort. This differed significantly between WHO grade 1 versus 2/3 meningioma primaries (168 vs. 15 months, p < 0.005).
Conclusion
Metastatic meningioma appears to be associated with more positive prognosis than other brain tumor types with extra-neural metastasis or metastasis in general. This is particularly true for cases arising from a WHO grade 1 meningioma.
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Data availability
No datasets were generated or analysed during the current study.
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The authors declare that no funds, grants, or other support were received during the preparation of this manuscript. The authors also have no relevant financial or non-financial interests to disclose. All authors contributed meaningful to this manuscript as follows: Gina Watanabe: Methodology, Data curation, Validation, Writing (Original); Kurtis Young: Data curation, Validation; Erin Rauber: Data curation, Investigation; Mohammad Khan: Data curation, Investigation; Reannon Suzuki: Validation, Investigation; Robert Riestenberg: Validation, Writing (Review); Giuseppe Umana: Conceptualization, Writing (Review); Paolo Palmisciano: Conceptualization, Methodology, Writing (Review).
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All authors contributed meaningfully to this manuscript as follows: G.W.: Methodology, Data curation, Validation, Writing (Original); K.Y.: Data curation, Validation; E.R.: Data curation, Investigation; M.F.K.: Data curation, Investigation; R.S.: Validation, Investigation; R.R.: Validation, Writing (Review); G.E.U.: Conceptualization, Writing (Review); P.P.: Conceptualization, Methodology, Writing (Review).
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Watanabe, G., Young, K., Rauber, E. et al. A systematic review of extraneural meningioma metastasis: timing, evolution and outlook. J Neurooncol (2024). https://doi.org/10.1007/s11060-024-04659-6
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DOI: https://doi.org/10.1007/s11060-024-04659-6