It's the second most common cause of death for men. In fact every hour a man dies from prostate cancer in the UK.
But in a breakthrough, Cambridge scientists have now discovered that the disease can be divided into five different genetic groups.
This knowledge could one day allow patients to find out how aggressive their form of cancer is, and help them decide whether or not they need to be treated with radical surgery.
Click below to watch a report from ITV News Anglia's Elodie Harper