Brain-only metastatic breast cancer as a distinct clinical entity: evidence from national and institutional cohorts with implications for radiation therapy
Brain-only metastatic breast cancer (BO-MBC), defined as breast cancer with brain metastases (BrM) in the absence of extracranial metastatic disease (ECM), may represent a distinct metastatic phenotype. We characterized clinicopathologic features, treatment patterns, and outcomes of BO-MBC and evaluated associations be...