Testicular cancer is the most common cancer for men aged 15 to 49 in the UK. However, for the vast majority of men - around 95 per cent - testicular cancer is curable, and this rate is even higher when the cancer has been caught early. With this in mind, it is important that men to regularly check their testicles, so they can establish what's normal for them, therefore making it easier to spot changes as Dr Simon Chowdhury of London Bridge Hospital explains.