Outcomes and toxicity of stereotactic radiosurgery for melanoma brain metastases in patients receiving ipilimumab.

Purpose: Patients with melanoma treated with ipilimumab and radiosurgery (stereotactic radiosurgery [SRS]) were reviewed for efficacy/safety.

Methods: Patients who received ipilimumab and SRS for brain metastases were analyzed for control of SRS-treated metastasis and overall survival.

Results: We identified 27 patients, 26 were assessable for outcomes. Median time-to-treated metastasis progression was 6.3 months (95% CI: 3.1-12.2). Overall survival was 23.4 months (95% CI: 5.7-not estimable) for SRS prior to/during ipilimumab (n = 14), and 10.4 months (95% CI: 1.9-not estimable) for SRS after ipilimumab (n = 12). Overall, no unexpected toxicities were seen: 11% of patients experienced grade 3 CNS toxicity and 7% developed radionecrosis.

Conclusion: SRS for melanoma brain metastases with ipilimumab was well-tolerated. There may be improved survival for patients receiving SRS prior to/during ipilimumab.