A diagnostic step now standard across most wealthy countries, an MRI scan before any biopsy, is still used in only about a third of United States cases. With more than 333,000 new cases every year, prostate cancer is by far the most common cancer in American men. Pre-biopsy MRI has appeared in American prostate cancer detection guidelines since 2020. A broader review of MRI in prostate cancer screening reaches a similar conclusion about the benefit-to-harm balance. The most recent data show pre-biopsy scans were performed in only about a third of American prostate cancer cases in 2022.