E. Seguí

Paxalisib with Trastuzumab for HER2-Positive Metastatic Breast Cancer with Active Brain Metastases: A Phase II Trial with Integrated Plasma and CSF ctDNA Analyses

Abstract Purpose: Human epidermal growth factor receptor 2 (HER2)–positive breast cancer brain metastases (BCBM) frequently harbor PI3K/AKT/mTOR alterations. Preclinical HER2+ BCBM models demonstrated durable tumor regression with dual PI3K and mTOR inhibition. Our phase II trial evaluated paxalisib, a brain-penetrant...

Right-sizing treatment for HER2-positive breast cancer: evolving algorithms across the disease continuum.

Impact of BRCA2 pathogenic variants on outcomes to first-line CDK4/6 inhibitors plus endocrine therapy in HR-positive/HER2-negative metastatic breast cancer

BRCA2 PVs were independently associated with poorer outcomes to first-line CDK4/6i plus ET in HR-positive/HER2-negative MBC compared with controls, especially relevant among patients with endocrine-sensitive disease.