When treating patients with metastatic breast cancer, it’s important to repeatedly conduct liquid biopsies to look for acquired ESR1 mutations when patients progress after endocrine therapy, even if initial testing was done. That’s why Dr. Charles Turck is breaking down best practices for utilizing liquid biopsies to detect ESR1 mutations with Drs. Stephanie Graff and Pavani Chalasani. Dr. Graff is the Director of Breast Oncology at the Lifespan Cancer Institute in Providence, Rhode Island, and Dr. Chalasani is the Division Director of Hematology-Oncology at the GW Cancer Center in Washington, DC.