Impact of BRCA2 pathogenic variants on outcomes to first-line CDK4/6 inhibitors plus endocrine therapy in HR-positive/HER2-negative metastatic breast cancer
Background Currently, three cyclin-dependent kinase 4 and 6 inhibitors (CDK4/6i) are approved in combination with endocrine therapy (ET) as first-line treatment of patients with hormone receptor (HR)-positive/human epidermal growth factor receptor 2 (HER2)-negative metastatic breast cancer (MBC). The impact of homologo...