Letters: Sensible use of PSA test has life-prolonging role

Any fool can tell you that a raised PSA in an 80-year-old is relatively meaningless. To interpret a PSA, you need to know the patient's age and, ultimately, their Gleason score. The younger patient who requests a PSA should be taken seriously, especially if there is cancer in the family history. Many lives could be prolonged by its sensible use.

Dr John Nichols, Guildford, Surrey