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 ...

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 ...

The test measures the level of PSA, a protein produced by normal as well as malignant prostate gland cells, in the blood. Elevated PSA can be a marker for cancer. It also can signal a false positive ...