26th May 2025

A lady presents with a history of abdominal pain, heartburn and loose stool.

A lady presents with a history of abdominal pain, heartburn and loose stool. She has a medical history of AF, ischaemic heart disease and type 2 diabetes.  Her medications include: bisoprolol, omeprazole, atorvastatin and gliclazide. 

Her medications include: bisoprolol, omeprazole, atorvastatin and gliclazide. 

You suspect Zollinger-Ellison syndrome. She goes on to have an elevated serum fasting gastrin and gastric pH is 2.9 (normal <2).  What is the most appropriate next investigation?

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