9th July 2023

A 20-year-old male, normally fit and well, presents with a 3-month history of an intensely itchy rash over his knees

A 20-year-old male, normally fit and well, presents with a 3-month history of an intensely itchy rash over his knees, elbows and buttocks. He also reports a history of bloating and diarrhoea. You take a skin biopsy. What is an appropriate initial further investigation?

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