What is a PSA test, and how reliable is it?
A prostate-specific antigen (PSA) test measures a protein in the blood produced by prostate tissue. Cancer cells usually produce more PSA than regular cells, which may cause the PSA blood level to rise. However, analyzing a PSA score isn’t as simple as it sounds. Other conditions can also cause PSA levels to rise, including infection or inflammation of the prostate gland or benign prostatic hyperplasia (BPH). BPH is a non-cancerous enlargement of the prostate that affects many men as they age.
