Prostate Cancer Risk Assessment: Focus on Early PSA and Hereditary Risk
Gerald L. Andriole, Jr., MD, Robert K. Royce Distinguished Professor and Chief of Urologic Surgery at Barnes-Jewish Hospital, the Siteman Cancer Center, and Washington University School of Medicine in St. Louis, Missouri, discusses two areas of prostate cancer risk assessment: age-adapted PSA and hereditary risk. Dr. Andriole begins with an early trial which showed that for men who have a PSA of <1 in their first screening, their 15-year chance of developing metastatic prostate cancer or dying is less than 1%. Their risk level drops down to <0.2% if their PSA value remains at <1 in a second screening. If screenings continue to show low PSA levels as the patient ages, one could conclude that a low-risk score should result in no further screening, but Dr. Andriole cautions against this approach. He then discusses the PROBASE study, a prospective study randomizing PSA testing in men starting at age 45 vs. the standard age of 50. The early arm of the study has 23,301 men and the goal is to look at the detection of Gleason grade group 2 or above cancer by the time a man reaches age 50. Dr. Andriole addresses the role of family history, noting that a positive family history increases the probability of developing prostate cancer, but not necessarily mortality. In contrast, a higher genetic risk score (GRS) is associated with a higher mortality rate. He then discusses using a Prompt score, which is more efficient when compared with a PSA screening alone. Dr. Andriole concludes that physicians should assess PSA early in life and may consider adding in 4K score. Ultimately, a combination of a number of factors, including family history, race and ethnicity, genetic risk score, and PSA, will be needed.
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