PSA plays a variety of roles, the most familiar being screening to detect prostate cancer at an early stage. PSA also helps to define the Stages of Blue. Another role of PSA is to detect cancer relapse after surgery or radiation. Lastly, rises or declines in PSA after hormone therapy or chemotherapy help determine whether a treatment is working...

Multiparametric MRI (MP-MRI) provides a three-dimensional image of the prostate, giving important information about the cancer’s location, size, and how “aggressive” it appears. MP-MRI also greatly increases the confidence that higher-grade cancers are not being overlooked in men on active surveillance. MP-MRI is usually performed without an endorectal coil...

If every available candidate in North America and Europe pursued active surveillance, close to 300,000 men could be spared from unnecessary surgery and radiation every year. In one observational study of men on active surveillance with Gleason 3+3=6 or low-volume...