Prostate Cancer Prostatic Dis
August 2024
Background: KEYNOTE-199 (NCT02787005) is a multicohort phase 2 study evaluating pembrolizumab in patients with metastatic castration-resistant prostate cancer (mCRPC). Results from cohorts 4 (C4) and 5 (C5) are presented.
Methods: Eligible patients had not received chemotherapy for mCRPC and had responded to enzalutamide prior to developing resistance as defined by Prostate Cancer Clinical Trials Working Group 3 guidelines.
Although intermittent androgen deprivation therapy was often recommended for metastatic hormone-sensitive cancer therapy in the past, we do not know whether its use can be extrapolated to combination therapy. Trials evaluating intermittent therapy are necessary as this strategy could improve patient quality of life and reduce adverse events and costs.
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