Gastrin is a peptide hormone produced by mucosal G cells of gastric antrum. Gastrin levels are pathologically increased in Gastrinoma, Gastric outlet obstruction and Hypo / Achlorhydria. This assay is used to investigate patients with Achlorhydria / Pernicious anemia and Zollinger- Ellison syndrome. The assay is extremely useful in the diagnosis of Gastrinoma
Do not eat or drink anything except water at least 9 to 12 hours before the test.