Prostate-specific antigen (PSA) is a protein produced by both normal and cancerous cells in the prostate gland. It is primarily measured through a blood test, where normal levels are typically found ...

Men with a PSA level above the median for their age group are at higher risk for prostate cancer. The concept of what is "normal" enters into nearly every aspect of clinical decision making. For ...

Prostate-specific antigen (PSA) testing may not accurately pinpoint levels at which transgender women on estrogen therapy may be at risk of developing prostate cancer, according to data from the ...

For decades, it has been known that prostate specific antigen ‒ or PSA ‒ tests are a flawed way to diagnose prostate cancer. Many men have a high PSA without having cancer. Others have low PSA that ...