20th July 2023

A 55-year-old man presents to his GP with an 18-month history of progressively worsening watery

A 55-year-old man presents to his GP with an 18-month history of progressively worsening watery, non-bloody diarrhoea with no other associated symptoms. He has a past medical history of cholecystectomy 5 years ago and hypercholesterolaemia, for which he takes atorvastatin 40mg ON. His GP discusses his case with a local gastroenterologist who suspects a diagnosis of bile acid malabsorption.

What is the best investigation to confirm the suspected diagnosis?

Select the SINGLE most appropriate option from the list below. Select ONE option only.