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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Tumor of which of the following type of cells result in Zollinger Ellison syndrome?
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The correct answer is  Zollinger Ellison syndrome is a malignancy of the gastrin secreting G cells present in the antral mucosa of the stomach. Parietal cells secrete acid and intrinsic factor, chief cells secretes pepsinogen, ECL cells synthesize histamine, and secretin is synthesized by the S cells of the duodenum. Ref: LANGE'S Gastrointestinal Physiology By Kim E Barrett chapter 3.