The SERENA-6 trial assessed a paradigm-shifting approach to personalized cancer therapy in patients with advanced-stage breast cancer, in which therapy was switched upon the identification of resistance-related mutations in ESR1 in circulating tumour DNA (ctDNA). Herein, we discuss how the results of this trial challenge the standard-of-care management for these patients, in whom therapy changes are otherwise undertaken only after radiographic and/or clinical progression.
- Arielle J. Medford
- Seth A. Wander
