Re: PSA 4.5 age 32
Your family seems to carry some pretty bad PC genes -- hopefully not you as well. 32 is very young for PC, but considering your brother... A PSA of 4.5 for someone as young as you is high, but PSA can come from other things -- prostatitis or BPH. In Europe, you can get another kind of PSA blood test called PHI that is more specific to PC. Maybe you can ask your doctor to order that test for you.
Avodart or Proscar may prevent PC, although they didn't get FDA approval for that in the US, so their use for that is controversial.