Dear Dr. Motola:
What is the normal PSA for a 69 year-old man? At what level does the PSA become troubling or warrant further tests?
PSA cut off levels have been debated for many years. Traditionally the cut off for a normal PSA has been 4, however more recently age-adjusted PSA values are being advocated. Utilizing age-adjusted PSA values helps to explain that the PSA of a 45-year-old should be different than that of a 70-year-old. A PSA less than 3.5 is usually considered...

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