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MediumGastroenterologyOesophageal cancer - diagnostic approachca-mccqe1ca-rcpsc-im

A 58-year-old man presents with a 2-month history of progressive difficulty swallowing solids then liquids, weight loss, and regurgitation of undigested food. He has a 30-pack-year smoking history and drinks alcohol heavily. Which is the most appropriate initial investigation?

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