Why routine cancer tests have age limits | Brief letters

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Jane Ghosh asks why the NHS’s routine screening for bowel and breast cancer has upper age limits (Letters, 28 April). Screening – testing because of risk, not symptoms – stops when the chance of helping you drops below the chance of harming you. Diagnostic testing is done at any age. Dr John Doherty Stratford-upon-Avon, Warwickshire

• Re Jane Ghosh’s letter about the NHS stopping routine bowel and breast cancer testing after the early 70s, it’s important to know that people over the age thresholds can request a bowel cancer test every two years or breast cancer screening every three years. Remembering to do so is a different story. David Duell Durham