Endocrine therapy is currently the cornerstone of treatment for advanced hormone receptor–positive (HR+) breast cancer in both pre- and postmenopausal patients. However, not all advanced HR+ breast cancers respond to first-line endocrine therapy, and those that do respond eventually relapse. Agents that target critical pathways involved in resistance to endocrine therapy, such as cyclin-dependent kinase (CDK) 4/6 inhibitors, have been approved by the US Food & Drug Administration (FDA) for the treatment of HR+/human epidermal growth factor receptor 2–negative (HER2−) advanced/metastatic breast cancer. Now, CDK 4/6 inhibitors are being investigated for the treatment of early stage HR+, HER2- breast cancer.
This web-based, on-demand, activity will feature interprofessional perspectives and expert insights on the latest emerging evidence for CDK 4/6 inhibitors in the adjuvant setting for early breast cancer. The faculty panel will also provide their perspectives and best practice recommendations for improving adherence and side effect management. Case-based discussion will provide practical approaches for integrating CDK 4/6 inhibitors into real-world clinical practice for the treatment of early stage HR+, HER2- breast cancer.
Since the date of this activity’s recording, an exciting and practice changing advancement has occurred with the Food and Drug Administration’s (FDA) recent approval of abemaciclib with endocrine therapy (tamoxifen or an aromatase inhibitor) for adjuvant treatment of adult patients with hormone receptor (HR)-positive, human epidermal growth factor receptor 2 (HER2)-negative, node-positive, early breast cancer at high risk of recurrence and a Ki-67 score ≥20%, as determined by an FDA approved test. This marks the first advancement in adjuvant treatment of HR+ HER2- breast cancer in nearly two decades. This approval was based off of the landmark data from the MonarchE clinical trial which demonstrated a 37% reduction in the risk of recurrence in patients.