Real-world genetic testing patterns in metastatic castration-resistant prostate cancer.

Lay abstract In 2017, US guidelines recommended the use of genetic testing in patients with metastatic castration-resistant prostate cancer (mCRPC). While the initial goal of genetic testing was to guide referral to genetic counselling and clinical trial enrollment, it is now also used to identify patients who could benefit from new drugs that target specific molecular defects. Using medical record data of US patients with mCRPC, we found that the rates of genetic testing and the breadth of molecular defects tested were suboptimal from 2013 to 2019. We also found lower rates of genetic testing in patients treated in community-based centers compared with those treated in academic oncology centers. These results underscore the importance of increasing the take up rate of genetic testing in patients with mCRPC to help guide treatment decisions.