Comparative Outcomes of Preoperative and Postoperative Stereotactic Radiosurgery in Patients with Brain Metastases: Systematic Review and Meta-Analysis
Pages 392-402
https://doi.org/10.22034/jampbr.2025.561643.1049
Ali Mohamadi Moghadam
Abstract Background and Aim: Brain metastases pose a significant therapeutic challenge due to high rates of local recurrence and treatment complications. However, it is still unclear how preoperative stereotactic radiation (Pre-SRS) compares to postoperative radiation (Post-SRS) in terms of efficacy and safety. The aim of the present study was to compare the clinical outcomes of Pre-SRS and Post-SRS in patients with brain metastases.
Method: In the present study, PubMed, Embase, Cochrane Library, and Web of Science databases were searched between 2015 and 2025 with targeted keywords. Seven relevant studies, including randomized clinical trials and cohort studies, were included in the analysis. Meta-analysis was performed using stata.v17 software. To combine the results, a fixed-effect model with the Inverse-Variance method for the hazard ratio and Mantel–Haenszel for the risk ratio was used, and heterogeneity between studies was assessed with the I² and H² indices.
Results: The hazard ratio for overall survival did not differ significantly between the Pre-SRS and Post-SRS groups (HR 0.891; 95% CI 0.55–1.23). Local failure at six months and one year was similar between the two groups. Pre-SRS reduced the risk of radiation necrosis (HR 0.689; 95% CI 0.352–1.026; P < 0.05) and leptomeningeal disease (HR 0.540; 95% CI 0.202–0.877; P < 0.05) compared with Post-SRS. Heterogeneity was minimal in all analyses (I² = 0–14%).
Conclusion: Based on the present meta-analysis, Pre-SRS had similar survival and recurrence rates to Post-SRS while reducing the risk of significant treatment complications. The present study suggests the use of Pre-SRS as a strategic intervention in patients with brain metastases.






