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EasyGIIrritable bowel syndromeuk-plab-1

A 36-year-old woman attends with a 6-month history of crampy abdominal pain relieved by defaecation, associated with alternating diarrhoea and constipation. She reports bloating and mucus in the stool but no weight loss, rectal bleeding or nocturnal symptoms. Blood tests and coeliac serology are normal. What is the most likely diagnosis?

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