By XANTHA LEATHAM FOR THE DAILY MAIL PUBLISHED: 20:08 EST, 13 February 2022 | UPDATED: 20:08 EST, 13 February 2022 A test that spots dangerous prostate cancer tumours has been developed by doctors. Current methods mean that differentiating between harmless and aggressive prostate tumours is incredibly difficult – especially at an early stage. For some men, the tumour can be...