title: Image of the month. A wind sock web deformity of the proximal duodenum.
authors.affiliation: Division of Gastroenterology, Department of Medicine, Hospital of the University of Pennsylvania, Philadelphia, Pennsylvania, USA.
authors.forename: M E
authors.initials: ME
authors.lastname: Blam
authors.forename: D C
authors.initials: DC
authors.lastname: Metz
mesh_terms: D004240:Diverticulum / Q000473:pathology*; D004386:Duodenum / Q000473:pathology*; D016145:Endoscopy, Digestive System; D006801:Humans; D007415:Intestinal Obstruction / Q000209:etiology*; D008297:Male; D008875:Middle Aged