Rana R. McKay, MD

Rana R. McKay, MD, Associate Professor of Medicine at the University of California, San Diego, and Co-Leader of the Genitourinary Oncology Disease Team at the Moores Cancer Center, and Alan H. Bryce, MD, Medical Director of the Genomic Oncology Clinic at Mayo Clinic Arizona in Scottsdale, debate whether to treat metastatic castration-resistant prostate cancer (mCRPC).

Taking the pro position, Dr. McKay presents on why physicians need to treat mCRPC, as well as come up with additional treatment options to help improve survival for mCRPC patients. She discusses the goals of mCRPC treatment, improved quality of life and overall survival, and displays a chart that summarizes the current landscape of treatment for advanced prostate cancer as she details how androgen receptor (AR) targeting agents are enhancing treatment. Dr. McKay reviews FDA-approved agents in mCRPC, stating that the vast majority both improve overall survival and quality of life. She specifically states that the agents, outside of pembrolizumab, rucaparib, and sipuleucel-T, can potentially increase overall survival by 53.6 months and improve cancer-associated pain, disease-related urinary symptoms, and symptomatic skeletal events. Dr. McKay then shows a graph displaying mCRPC treatment in a clinical practice, suggesting that mCRPC is grossly undertreated based on the vast majority of patients not going beyond first-line treatment. She states that there is little reliable data on the cost effectiveness of treatment and concludes that mCRPC should be treated based on data showing that treatments improve overall survival and quality of life.

Taking the con position, Dr. Bryce makes an argument against treating mCRPC based on the differences between trial and real-world populations, and the challenges of extreme treatments. Dr. Bryce cites quality of life post-treatment, financial toxicity, and patient-centric treatment as cons of mCRPC treatment. He shows a graph of mCRPC treatment management in clinical practice and states that the rapid drop off after first-line therapy could be caused by patient drop outs instead of undertreatment. Dr. Bryce discusses the mCRPC treatment process in detail, focusing on how after the first line of therapy, treatment options become much more extreme and mostly consist of chemo, and most patients only have about a year left to live if they are beyond second-line treatment. He uses a case study of a 73-year-old patient to show how real-world patients can differ from selected trial patients due to how patient selection leads to optimized outcomes. Dr. Bryce reviews data showing that 20% of patients report financial toxicity, something which is associated with anxiety and depression. He concludes that clinicians should exercise prudent judgment in deciding whether or not to treat patients with advanced cancer due to trials testing beyond third-line therapy not reflecting real-world patients and financial toxicity being a significant issue.