uk-sce-gastroenterology MCQ (SBA): Zollinger-Ellison Syndrome

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ModerateGastric & DuodenalZollinger-Ellison Syndromeuk-sce-gastroenterology

A patient with suspected Zollinger-Ellison syndrome has a fasting serum gastrin level of 1,200 pg/mL (normal <100). The patient is on omeprazole 20 mg daily. What is the most appropriate next step before confirming the diagnosis?

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