title: Hyperplastic and metaplastic polyps of the duodenum.
mesh_terms: D004379:Duodenal Neoplasms / Q000473:pathology*; D006801:Humans; D006965:Hyperplasia; D007417:Intestinal Polyps / Q000473:pathology*; D008297:Male; D008679:Metaplasia; D008875:Middle Aged