NCOG-39. EXPLORING THE POTENTIAL OF STEREOTACTIC RADIOSURGERY IN THE MANAGEMENT OF MENINGIOMAS

Abstract INTRODUCTION Meningiomas present complex therapeutic challenges due to their potential impact on neurological function and quality of life. While the standard of care involves observation and surgical resection, stereotactic radiosurgery (SRS) is an alternative treatment modality. This study aimed to compare the relative efficacy of SRS and surgical resection in the management of meningiomas to inform evidence-based decision-making in this clinical context. METHODS A retrospective cohort study was conducted using the TriNetX database, comparing patients undergoing treatment for meningiomas with either stereotactic radiosurgery (SRS) or surgical resection. Cohorts were matched on comorbidities. Rates of mortality and malignant neoplasms of the brain within 5-years of treatment with either modality were compared. In addition, short-term outcomes were assessed at 3 months post-treatment. RESULTS After matching, there were 1,898 patients in each cohort. Patients receiving SRS exhibited a significantly lower risk of mortality (95% CI: 0.76-1.07) and a decreased risk of developing malignant neoplasms of the brain (RR: 0.68, 95% CI: 0.54-0.85) over 5 years, compared to surgical resection. At 3-months post treatment, patients treated with SRS demonstrated significantly lower relative risks for several outcomes, including cerebral infarction (RR: 0.27, 95% CI: 0.18-0.39), hydrocephalus (RR: 0.19, 95% CI: 0.11-0.32), cerebral edema (RR: 0.13, 95% CI: 0.10-0.18), seizures (RR: 0.27, 95% CI: 0.21-0.34), neurological deficits (RR: 0.19, 95% CI: 0.13-0.28), and post-procedural infection (RR: 0.14, 95% CI: 0.07-0.28). CONCLUSION This retrospective cohort study suggests that in the management of meningiomas, SRS may be associated with lower mortality rates, decreased risks of malignant neoplasms of the brain, and improved short-term outcomes compared to surgical resection. Further research is warranted to validate these results and explore long-term outcomes and potential adverse effects.