97P Is continuing CDK4-6 inhibitor therapy safe during the COVID-19 pandemic? A UK cancer centre experience

Abstract

CDK4-6 inhibitors are now considered the standard of care for advanced ER-positive HER2-negative advanced breast cancer (ABC) in combination with endocrine therapy (ET). During the first wave of the COVID-19 pandemic, clinicians were uncertain what impact CDK4-6 inhibitor-induced immunosuppression may have on the risk of contracting COVID-19 or the severity of infection. Some clinicians pre-emptively reduced doses, altered schedules, or even withheld treatment, continuing ET alone. There is currently no evidence that CDK4-6 inhibitors increase the risk or severity of COVID-19 infection, although there have reports of protracted illness.