Enzalutamide Monotherapy in the EMBARK Trial Should Be Practice-changing and Existing Data Suggest How to Mitigate Toxicity.

Data from the EMBARK trial demonstrate the potential of enzalutamide monotherapy as an effective treatment for biochemically recurrent prostate cancer (BCR) without the side effects of testosterone-lowering therapy. Unfortunately, concerns about gynecomastia and how to manage this treatment-related toxicity have diminished enthusiasm. Existing data may offer an alternative scheduling strategy for enzalutamide monotherapy in BCR.