One thing I would like to add to Thomas's articulation on the subject- While PSA scores are an important indicator of potential problems they are not an absolute and are only an indicator. If you have a PSA screen and it comes back elevated don't flip your lid.
Your not gonna die.
You don't necessarily have prostate cancer.
You might not have anything other than a few years under your belt.
PSA's can be elevated for any number of reasons.

For Chrissake DO NOT GET ON THE INTERNET!
There is so much inaccurate information out there you will be convinced that your gonna croak in 5.37 days.

Find a competent Urologist and follow through.