title: Factor V Leiden mutation in patients with Behçet's disease.
abstract: OBJECTIVE
  To determine the relation between factor V Leiden and Behçet's disease (BD), which is described as chronic relapsing vasculitis with pathogenetic mechanisms that seem to be related to anticoagulant pathways.
  
  
  METHODS
  Using polymerase chain reaction, the factor V Leiden mutation was investigated in 44 patients with BD, of which 5 had thrombotic histories.
  
  
  RESULTS
  Ten patients were found to have the factor V Leiden mutation. This frequency (22.7%) was higher than that of our general population (7.1 %) (p < 0.05). Of the 5 patients with BD with thrombotic histories, 3 (60%) had factor V Leiden mutation (one homozygote, 2 heterozygote), while 7 of 39 (17.9%) patients with no thrombotic history had the factor V Leiden mutation (2 homozygotes, 5 heterozygotes). There is no statistical difference in the frequency of the factor V mutation between patients with BD with no thrombosis and the control group. The frequency of thrombosis in BD with and without factor V Leiden mutation was (3/10) 30% and (2/34) 5.9%, respectively.
  
  
  CONCLUSIONS
  These findings suggest that homozygosity or heterozygosity for factor V Leiden is not always associated with occurrence of venous thrombosis in BD, but it may be a contributing risk factor for venous thromboembolic events in these patients.
authors.affiliation: Department of Pediatric Hematology, Faculty of Medicine, Hacettepe University, Ankara, Turkey.
authors.forename: A F
authors.initials: AF
authors.lastname: Oner
authors.forename: A
authors.initials: A
authors.lastname: Gürgey
authors.forename: A
authors.initials: A
authors.lastname: Gürler
authors.forename: L
authors.initials: L
authors.lastname: Mesci
mesh_terms: D000293:Adolescent; D000328:Adult; D001528:Behcet Syndrome / Q000235:genetics*; D002648:Child; D005165:Factor V / Q000235:genetics*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009154:Mutation; D012307:Risk Factors; D013927:Thrombosis / Q000235:genetics
chemical_list: C095381:factor V Leiden; D005165:Factor V