title: Risk factors and clinical presentation of portal vein thrombosis in patients with liver cirrhosis.
abstract: OBJECTIVE
  Portal vein thrombosis in patients with liver cirrhosis is usually associated to hepatocellular carcinoma. Clinical presentation of non-neoplastic portal vein thrombosis (PVT) in cirrhotic patients has not been specifically studied and risk factors of PVT in this group of patients are still poorly understood.
  
  
  METHODS
  We studied all patients with PVT and liver cirrhosis admitted to our Unit from January 1998 to December 2002. They were paired (by gender, age and Child-Pugh score) to a group of cirrhotic patients without PVT and screened for acquired and inherited thrombophilic risk factors. These factors together with the site of thrombosis and the severity of the liver disease were correlated to the clinical presentation of PVT.
  
  
  RESULTS
  Out of a total of 701 cirrhotic patients admitted to our hospital and routinely screened with Doppler ultrasound, 79 (11.2%) were found to have PVT. Of these, 34 (43%) were asymptomatic and 45 (57%) were symptomatic (31 presented with portal hypertensive bleed and 14 with abdominal pain, 10 of whom had intestinal infarction). Mesenteric vein involvement was never asymptomatic and lead to intestinal ischemia or infarction. Most patients were in class Child-Pugh B and C. Among thrombophilic risk factors studied only the mutation 20210 of the prothrombin gene resulted independently associated to PVT.
  
  
  CONCLUSIONS
  Portal vein thrombosis may be completely asymptomatic in patients with liver cirrhosis; however in more than half of cases presents with life-threatening complications such as gastrointestinal haemorrhage and intestinal infarction. Cirrhotic patients with PVT usually have an advanced liver disease and the presence of the mutation 20210 of the prothrombin gene increases more than fivefold the risk of PVT.
authors.affiliation: Gastroenterology Unit, A. Cardarelli Hospital, Naples, Italy. luamitra@tin.it
authors.forename: Lucio
authors.initials: L
authors.lastname: Amitrano
authors.forename: Maria Anna
authors.initials: MA
authors.lastname: Guardascione
authors.forename: Vincenzo
authors.initials: V
authors.lastname: Brancaccio
authors.forename: Maurizio
authors.initials: M
authors.lastname: Margaglione
authors.forename: Francesco
authors.initials: F
authors.lastname: Manguso
authors.forename: Luigi
authors.initials: L
authors.lastname: Iannaccone
authors.forename: Elvira
authors.initials: E
authors.lastname: Grandone
authors.forename: Antonio
authors.initials: A
authors.lastname: Balzano
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D016022:Case-Control Studies; D005260:Female; D006801:Humans; D008103:Liver Cirrhosis / Q000150:complications*; D008297:Male; D008875:Middle Aged; D017354:Point Mutation; D011169:Portal Vein; D011516:Prothrombin / Q000235:genetics; D012307:Risk Factors; D019851:Thrombophilia / Q000150:complications / Q000235:genetics; D020246:Venous Thrombosis / Q000175:diagnosis* / Q000209:etiology*
chemical_list: D011516:Prothrombin