PSA stands for prostate-specific antigen, a substance naturally produced in prostate tissue. A small amount of PSA regularly sneaks into the bloodstream, and low blood concentration is considered ...

Laboratory reference ranges reflect methods, populations, and policies, and experienced clinicians interpret them in context rather than applying fixed cutoffs theoretically.

It’s important to follow guidance on prostate-specific antigen screening that maximizes benefits and minimizes potential harms such as overdiagnosis and overtreatment.

News that former President Joseph Biden has advanced prostate cancer has revived long-standing questions about the benefits versus the harms of a blood test that screens for the most commonly ...