Former Prime Minister David Cameron has revealed he has been treated for prostate cancer.Lord Cameron, 59, told the Times newspaper his wife had insisted he go for a check-up after they listened to a BBC radio interview with entrepreneur Nick Jones, who was campaigning for more men to be tested after being diagnosed himself.The Tory peer had a prostate-specific antigen (PSA) test earlier this year, followed by an MRI scan and a biopsy. He was then treated with focal therapy, which targets the area where the tumour is present using methods such as ultrasound waves to destroy cancer cells.Prostate cancer is the most common cancer in males in the UK, with around 55,000 new cases every year.A PSA test looks for proteins associated with prostate cancer and the result was high in Lord Cameron’s case.He told the newspaper he wanted to use his platform to support a call by Prostate Cancer Research, a charity which counts Mr Jones – founder of private members’ club chain Soho House – as a trustee, for screening to be offered to high-risk men.The cancer is most common in older age – particularly among men over 75. Cases in the under-50s are rare. It is also more common in black men.”I don’t particularly like discussing my personal intimate health issues, but I feel I ought to,” Lord Cameron said.”Let’s be honest. Men are not very good at talking about their health. We tend to put things off.”But he said: “I sort of thought, well, this has happened to you, and you should …