title: Localized amyloid tumor in small bowel.
abstract: We report a case of localized jejunal amyloidosis occurring in a 74-year-old man who experienced an episode of digestive bleeding while he was receiving oral anticoagulation. It illustrates a rare entity, characterized by an endoscopic aspect of polypoid, pseudotumoral formations. Histologically, submucosal connective tissues, muscularis mucosae, and blood vessel walls are massively infiltrated by amyloid, giving a typical red/green birefringence under polarized light.
authors.affiliation: Department of Pathology, Erasme University Hospital, Brussels, Belgium.
authors.forename: M O
authors.initials: MO
authors.lastname: Peny
authors.forename: J C
authors.initials: JC
authors.lastname: Debongnie
authors.forename: J
authors.initials: J
authors.lastname: Haot
authors.forename: A
authors.initials: A
authors.lastname: Van Gossum
mesh_terms: D000368:Aged; D000686:Amyloidosis / Q000175:diagnosis* / Q000473:pathology; D006801:Humans; D007410:Intestinal Diseases / Q000175:diagnosis* / Q000473:pathology; D007421:Intestine, Small / Q000473:pathology; D008297:Male