Don't know, but if you are worried get it checked out first by your doctor. I understand that if you have concerns it is very uncomfortable, but you could well put your mind at rest by visiting your doctor.
Secondly, prostate cancer is more easily treated if caught early on, so best not to hang around.
If you have a medical booked and want to know if you will pass it, I am afraid I can't help you any more than to suggest you go on the CAA website and download the medical requirements.
www.caa.co.uk search for JAR FCL 3 medical standards.
Good luck.