Decisional Tools to Determine Need for Biopsy and Re-Biopsy in Men with Elevated PSAs
Guilherme Godoy, MD, MPH, Assistant Professor of Urology and Urology Oncology at Baylor College of Medicine, in Houston, Texas, discusses how and when to use elevated PSA and other markers to determine whether a biopsy is needed. Dr. Godoy cautions that relying solely on an abnormal level for a sensitive biomarker like PSA can lead to false positives and overtreatment, noting that an elevated PSA is an indicator of the prostate but not necessarily of cancer. He reminds physicians to consider the PSA level related to the size of the prostate before jumping ahead to other steps. Dr. Godoy describes how oft-overlooked PSA derivatives in conjunction with family history and other risk factors can be used to individualize risk and personalize assessments for a patient. He then presents an array of current and emerging molecular, genetic, and imaging-based testing options. The 4Kscore assesses the probability of high-risk cancer (Gleason 7 or higher) in the biopsy and informs risk of metastatic disease in 20 years. This test can also indicate risk stratification for mortality. Urine-based tests such as SelectMDx and EPI ExoDx Prostate Intelliscore similarly provide risk stratification for biopsy-naïve men, while tissue-based tests such as ConfirmMDx are useful when a patient has had a previous negative prostate biopsy. He summarizes with a diagram of the clinical integration of MRI and molecular markers illustrating how these testing options should be used.
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