(the)GEN 4 October 2014 Cancer, Men's Health, Prostate Cancer Prostate Cancer: Looking after Yourself (the)GEN 4 October 2014 Cancer, Men's Health, Prostate Cancer The major killers of men in their 50s, 60s and 70s are heart disease, prostate disease and bowel cancer. Professor Roger Kirby of London says these can be identified and treated before they take hold but men have to change their attitude to health.