PSA Velocity and PSA Density in Prostate Cancer Evaluation
By Rodney Herbert Prostate cancer screening often starts with a PSA blood test. PSA stands for prostate-specific antigen, a protein made by the prostate gland. Doctors look not just at the PSA number itself, but also at PSA velocity (how fast PSA changes over time) and PSA density (PSA level relative to prostate size) [...]