After establishing a concise and informative introduction to metastatic brain tumours, their origins, clinical features, and treatments, Dr. Branavan Manoranjan introduced the Lancet Oncology paper by Mahajan et al. (2017). He explained the main findings of the paper in depth. Namely, that Stereotactic Radiosurgery extends the time to local recurrence, but has no change in overall survival or freedom from distant brain metastasis.