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EasyGastroenterologyColorectal Cancermrcgp aktmrcp part 1ukmlapane

A 70-year-old man presents with a 3-month history of change in bowel habit towards diarrhoea, rectal bleeding, and tenesmus. He has lost 5kg in weight. Abdominal examination reveals a mass in the left iliac fossa. What is the most appropriate investigation?

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