title: Budd-Chiari syndrome in Sweden: epidemiology, clinical characteristics and survival - an 18-year experience.
abstract: BACKGROUND
  The exact incidence and prevalence of Budd-Chiari syndrome (BCS) is unknown in the general population. Published reports differ in terms of the clinical characteristics, effects of therapy and survival.
  
  
  OBJECTIVE
  To investigate the epidemiology, clinical presentation and survival in patients with BCS.
  
  
  METHODS
  Retrospective multicentre study in Sweden reviewing the medical records of all patients with BCS 1986-2003, identified from the computerised diagnosis database of 11 hospitals, including all university hospitals and liver transplantation centres.
  
  
  RESULTS
  Forty-three patients with BCS were identified, of whom nine (21%) had concomitant portal vein thrombosis. The mean age-standardised incidence and prevalence rates in 1990-2001 were calculated to be 0.8 per million per year and 1.4 per million inhabitants respectively. Myeloproliferative disorders (38%), thrombophilic factors (31%) and oral contraceptives (30%) were common aetiological factors. Two or more risk factors were present in 44%. In 23%, no risk factor was evident. The median follow-up time was 2.7 years. Seventy-two percent were on anticoagulant therapy during follow-up. Transjugular intrahepatic portosystemic shunting, surgical shunting procedures and liver transplantation were performed in 4, 6 and 18 patients respectively. Nineteen patients died. The overall transplantation-free survival at 1, 5 and 10 years was 47, 28 and 17% respectively.
  
  
  CONCLUSIONS
  Budd-Chiari syndrome is a rare disorder; the mean age-standardised incidence and prevalence rates in Sweden in 1990-2001 were calculated to be 0.8 per million per year and 1.4 per million inhabitants respectively. The presence of a myeloproliferative disorder was a common aetiological factor in our cohort and about half of the patients had a multifactorial aetiology. The transplantation-free survival was poor.
authors.affiliation: Department of Medicine, Ryhov County Hospital, Jönköping, Sweden.
authors.forename: Rupesh
authors.initials: R
authors.lastname: Rajani
authors.forename: Tor
authors.initials: T
authors.lastname: Melin
authors.forename: Einar
authors.initials: E
authors.lastname: Björnsson
authors.forename: Ulrika
authors.initials: U
authors.lastname: Broomé
authors.forename: Per
authors.initials: P
authors.lastname: Sangfelt
authors.forename: Ake
authors.initials: A
authors.lastname: Danielsson
authors.forename: Anders
authors.initials: A
authors.lastname: Gustavsson
authors.forename: Olof
authors.initials: O
authors.lastname: Grip
authors.forename: Hans
authors.initials: H
authors.lastname: Svensson
authors.forename: Lars
authors.initials: L
authors.lastname: Lööf
authors.forename: Sven
authors.initials: S
authors.lastname: Wallerstedt
authors.forename: Sven H C
authors.initials: SH
authors.lastname: Almer
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001774:Blood Chemical Analysis; D006502:Budd-Chiari Syndrome / Q000453:epidemiology* / Q000209:etiology* / Q000473:pathology*; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D015995:Prevalence; D012307:Risk Factors; D018709:Statistics, Nonparametric; D016019:Survival Analysis; D013548:Sweden / Q000453:epidemiology