Trial Supports MRI Surveillance Over Preventive Brain Radiation in Small-Cell Lung Cancer

The international phase 3 SWOG S1827 MAVERICK trial demonstrates that MRI surveillance alone significantly improves cognitive failure-free survival compared to MRI surveillance combined with prophylactic cranial irradiation (PCI) in small-cell lung cancer patients. This groundbreaking finding, presented at the 2026 International Association for the Study of Lung Cancer World Conference, suggests that avoiding preventive brain radiation can preserve patients' cognitive function while maintaining effective cancer monitoring. The results indicate that MRI surveillance alone should become the new standard of care for small-cell lung cancer patients, offering better quality of life by reducing long-term neurological side effects associated with radiation therapy. This discovery represents a significant shift in treatment strategy that prioritizes preserving brain health alongside cancer control.