Evaluation of an Epigenetic Assay for Predicting Repeat Prostate Biopsy Outcome in African American Men.

OBJECTIVE: To evaluate an epigenetic assay performed on tissue from negative prostate biopsies in a group of African American (AA) men undergoing repeat biopsy, and to compare accuracy for predicting repeat biopsy outcome to prior studies conducted in predominantly Caucasian populations. MATERIALS AND METHODS: The study population consisted of 211 AA men from 7 urology centers across the United States; all of whom were undergoing 12-core transrectal ultrasound-guided repeat biopsy within 30 months from a negative index biopsy. All biopsy cores from the negative index biopsy were profiled for the epigenetic biomarkers GSTP1, APC, and RASSF1 using ConfirmMDx for Prostate Cancer (MDxHealth, Irvine, CA). RESULTS: Upon repeat biopsy, 130 of 211 subjects (62%) had no prostate cancer (PCa) detected and 81 of 211 (38%) were diagnosed with PCa. Of the subjects with PCa, 54 (67%) were diagnosed with Gleason score (GS) ≤6 PCa and 27 (33%) with GS ≥7 disease. For detection of PCa at repeat biopsy, ConfirmMDx sensitivity was 74.1% and specificity was 60.0%, equivalent to prior studies (P = .235 and .697, respectively). For detection of GS ≥7 PCa, sensitivity was 78% and specificity was 53%. The negative predictive values for detection of all PCa and GS ≥7 PCa were 78.8% and 94.2%, respectively. CONCLUSION: In this group of AA men, we successfully validated an epigenetic assay to assess the need for repeat biopsy. Results were consistent with previous studies from predominantly Caucasian populations. Therefore, the ConfirmMDx assay is a useful tool for risk stratification of AA men who had an initial negative biopsy.

Quality Improvement Summit 2016: Shared Decision Making and Prostate Cancer Screening.

INTRODUCTION: The American Urological Association Quality Improvement Summit occurs regularly to provide education and promote dialogue around the issues of quality improvement and patient safety. Nearly all prostate cancer screening guidelines recommend shared decision making strategies when determining whether prostate specific antigen testing is right for a specific patient. This summit, held in partnership with the Society for Medical Decision Making, focused on techniques to identify and understand patient values in relation to prostate cancer screening and treatment, and to promote incorporation of shared decision making into prostate cancer screening discussions. METHODS: Information presented at the Quality Improvement Summit was provided by physicians and leading experts in the field of shared decision making. The open forum of this summit encouraged contributions from participants about their personal experiences with shared decision making and their thoughts on the tools presented during the day. RESULTS: Shared decision making supports collaboration between physician and patient in situations where there are multiple preference sensitive options. CONCLUSIONS: Practitioners should include formal shared decision making procedures surrounding prostate specific antigen testing in their practices to ensure that testing is in accordance with patient values and desired outcomes. Tools and strategies like those reviewed in this Quality Improvement Summit are invaluable for alleviating potential burden on providers, ensuring communication and improving quality of care.

Occult renal cell carcinoma in a patient with polymyositis.

Polymyositis (PM) is associated with an increased risk of malignancy. We report a case in which a 45-year-old patient with PM underwent computed tomography to search for an occult malignant process. The evaluation revealed a left renal mass that was treated successfully by laparoscopic radical nephrectomy. Pathologic evaluation revealed a clear cell renal cell carcinoma. The patient remained free of disease at 2 years postoperatively and required decreasing amounts of medication to manage his PM. This suggests that renal malignancies may contribute to the PM disease process in a paraneoplastic fashion and that screening for occult malignancy in the presence of PM is warranted.