title: Superior mesenteric vein stenosis complicating Crohn's disease.
abstract: BACKGROUND
  Superior mesenteric vein stenosis as a consequence of mesenteric fibrosis, causing the development of small bowel varices, is an unrecognised association of Crohn's disease.
  
  
  METHODS
  Two cases of gastrointestinal bleeding occurring in patients with Crohn's disease, and a third case, presenting with pain and diarrhoea, are described. In all three patients, visceral angiography showed superior mesenteric vein stenosis with dilatation of draining collateral veins in the small bowel. Overt gastrointestinal bleeding or iron deficiency anaemia resulting from mucosal ulceration is common in Crohn's disease, but acute or chronic bleeding from small bowel varices as a result of superior mesenteric vein stenosis due to fibrosis has not previously been reported.
authors.affiliation: Gastroenterology Unit, Department of Medicine, Imperial College School of Medicine, London, UK.
authors.forename: R S
authors.initials: RS
authors.lastname: Hodgson
authors.forename: J E
authors.initials: JE
authors.lastname: Jackson
authors.forename: S D
authors.initials: SD
authors.lastname: Taylor-Robinson
authors.forename: J R
authors.initials: JR
authors.lastname: Walters
mesh_terms: D000328:Adult; D003424:Crohn Disease / Q000150:complications*; D005260:Female; D006801:Humans; D008297:Male; D008641:Mesenteric Vascular Occlusion / Q000000981:diagnostic imaging / Q000209:etiology*; D008642:Mesenteric Veins / Q000000981:diagnostic imaging; D008875:Middle Aged; D011859:Radiography