Dear Dr. Roach: I am a 68-year-old male in good health who exercises regularly, doesn't take any medications, and doesn't have a family history of prostate cancer. During my most recent yearly physical exam with my physician, my PSA score was 3.5 ng/mL from the blood draw and analysis, while my physical exam was deemed normal. One year ago, my PSA score was 1.5 ng/mL. My physician is going to repeat the blood draw and analysis, then advise what the next steps are.

Although my PSA score is within the normal range (less than 4.0 ng/mL), should I be concerned? Is this a "false positive," and what would you suggest for next steps?

— C.M.B.

Dear C.M.B.: The prostate specific antigen (PSA) test is a way to screen for prostate cancer. It is not perfect, but when used properly, it can save li

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