Scientists in Newcastle have developed a blood test to help diagnose prostate cancer.
Currently doctors can struggle to predict which tumours will become aggressive, making it difficult to decide on treatment for many men.
The new test shows which men are more likely to have a form of the disease that requires treatment.
Dr Andrew Harbottle from MDNA Life Sciences said the test, which is only available privately, costs more than £400, but hopes it will soon be available on the NHS.
Charity Prostrate Cancer UK said the test was “interesting” but called for more research into its effectiveness.
Prostate cancer is the most common cancer in men in the UK.