Most men ask how to prevent prostate cancer. That is the wrong question. By age 79, close to six in ten men are carrying one they will never know about. What matters is not avoiding the disease. It is avoiding the version that kills.

The fear is human, but it shouldn't be the thing deciding your health. A plain-language guide to prostate cancer screening: what PSA, MRI, and biopsy really tell you, and the questions to ask before you see the doctor.