Dr Hayley Whitaker is a Cancer Research UK scientist who specialises in prostate cancer. We hear about her quest for better screening for the disease. Dr Whitaker is lead author of a study about how a particular protein helps identify if a prostate cancer patient needs more intense treatment. The protein is called NAALADL2 and is linked to the spread of prostate cancer tumour cells to surrounding healthy tissues. Every year 41,000 men are diagnosed with prostate cancer in the UK. Dr Whitaker hopes that a test for the protein may spare patients unnecessary treatment.