31st July 2023

A 58-year-old man presents with a 2-month history of weight loss, postprandial bloating, and loose stools

A 58-year-old man presents with a 2-month history of weight loss, postprandial bloating, and loose stools, which he describes as “pale and smelly”. He is visibly underweight on examination, but of normal colour and with a soft, non-tender abdomen.

What is the most important diagnostic investigation to consider?

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