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ModerateGIIrritable bowel syndromeuk-plab-1

A 28-year-old woman presents with recurrent episodes of crampy abdominal pain relieved by defecation, associated with bloating and alternating diarrhoea and constipation. She has no weight loss, rectal bleeding, anaemia or nocturnal symptoms. Examination and basic blood tests are normal. What is the most likely diagnosis?

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