title: Trans-anastomotic porto-portal varices in patients with gastrointestinal haemorrhage.
abstract: OBJECTIVE
  Porto-portal varices are commonly seen in patients with segmental extra-hepatic portal hypertension and develop to provide a collateral circulation around an area of portal venous obstruction. It is not well recognized that such communications may also develop across surgical anastomoses and be the source of gastrointestinal haemorrhage. The possible mode of development of such communications has not been previously discussed.
  
  
  METHODS
  Over a 3-year period between 1995 and 1998, porto-portal varices were demonstrated across surgical anastomoses in four patients who were referred for the investigation of acute (two), acute-on-chronic (one) and chronic gastrointestinal bleeding (one). Their medical notes and the findings at angiography were reviewed.
  
  
  RESULTS
  Three patients had segmental portal hypertension due to extra-hepatic portal vein (one) or superior mesenteric vein (two) stenosis/occlusion. One patient had mild portal hypertension due to hepatic fibrosis secondary to congenital biliary atresia. At angiography all patients were shown to have varices crossing previous surgical anastomoses. These varices were presumed to be the cause of bleeding in three of the four patients; the site of bleeding in the fourth individual was not determined.
  
  
  CONCLUSIONS
  Trans-anastomotic porto-portal varices are rare. They develop in the presence of extra-hepatic portal hypertension and presumably arise within peri-anastomotic inflammatory tissue. Such varices may be difficult to manage and their prognosis is poor when bleeding occurs.
authors.affiliation: The Department of Imaging, Imperial College, Hammersmith Hospital, London, UK.
authors.forename: A W
authors.initials: AW
authors.lastname: Mitchell
authors.forename: J E
authors.initials: JE
authors.lastname: Jackson
mesh_terms: D000328:Adult; D000368:Aged; D002648:Child; D005260:Female; D006471:Gastrointestinal Hemorrhage / Q000000981:diagnostic imaging / Q000209:etiology*; D006801:Humans; D006975:Hypertension, Portal / Q000150:complications / Q000000981:diagnostic imaging; D008297:Male; D011169:Portal Vein / Q000000981:diagnostic imaging; D011859:Radiography; D014648:Varicose Veins / Q000150:complications* / Q000000981:diagnostic imaging