Our expert says:
A PSA single value under 4 is usually normal but one should do serial tests to see whether it stays stable or goes up. With a Normal PSA and Normal ( smooth) rectal examination, the chances of having prostate cancer is very low. At 50 years old, 1/2 of men do have enlarged prostrates anyway. If you are worried, just follow up with a PSA in about 3 months time again.
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