Abnormal duodenum morphology Duodenal gastric metaplasia 2020-09-03T11:59:20Z Foci of gastric-type mucus-secreting cells interspersed between duodenal enterocytes. These foci of gastric epithelial cells contain Periodic acid-Schiff (PAS)-positive neutral mucin and lack a brush border. Despite structural analogy, the epithelium in the duodenal gastric metaplasia (DGM) differs from true gastric epithelium with respect to lectin composition. DGM is considered to be an acquired condition related to gastric acid injury and H pylori may also be associated in its pathogenesis