DEAR MAYO CLINIC: What do you recommend as far as PSA testing? Is it true that the test is not completely accurate? ANSWER: The prostate-specific antigen (PSA) blood test can be a valuable tool for detecting prostate problems, particularly prostate cancer. But a PSA test alone is not enough to diagnose a specific condition. To be most useful, PSA results need to be considered within the context of a man's health history and current medical situation.
Chicago Tribune, by Jeffrey Karnes, M.D., Mayo Clinic, 02/07/2012