title: Hyperplasiogenic polyp in the duodenum.
abstract: Report on a 42-year-old patient with extensive heterotopia of gastric mucosa within the first portion of the duodenum which formed the matrix of a hyperplasiogenic polyp.
mesh_terms: D000328:Adult; D002828:Choristoma / Q000473:pathology*; D004379:Duodenal Neoplasms / Q000473:pathology*; D005260:Female; D006801:Humans; D007417:Intestinal Polyps / Q000473:pathology*; D009378:Neoplasms, Multiple Primary / Q000473:pathology*; D013270:Stomach