MUC5AC and adenoma: Functionally, it secretes alkaline fluid composed of mucin, pepsinogen, and enterogastrone which protect the duodenal mucosa from the injurious effect of gastric chyme.7These glands are abundant in the proximal duodenum and they decrease in number distally.8Feyrter classified the abnormal proliferation of Brunner's gland into the following three subtypes: (1) diffuse hyperplasia, (2) circumscribed hyperplasia, and (3) glandular adenoma.9Glandular adenoma is modified recently as BGH.