title: Long-term follow-up of patients with acute liver failure of indeterminate aetiology.
abstract: OBJECTIVE
  To determine the clinical characteristics of patients with acute liver failure of indeterminate cause and their long-term outcome in comparison with patients with acute liver failure of obvious aetiology (acetaminophen and mushroom poisoning, Budd-Chiari syndrome, acute viral hepatitis) and other controls (idiosyncratic drug reactions, autoimmune hepatitis and Wilson's disease).
  
  
  METHODS
  All patients with acute liver failure and listed for liver transplantation in Sweden between 1984 and 2006 were included in a retrospective analysis.
  
  
  RESULTS
  A total of 71 patients with acute liver failure were identified, 33 with indeterminate cause (IDC group), 23 with obvious aetiology (OE group) and 15 other controls (OC group). Before admission to the transplant centre, IDC patients were hospitalized in the referring hospital for 9 days (4-15) versus 1.5 days (1-3) in the OE group (p<0.001) and 7 days (2-14) in the OC group (NS). Serum bilirubin was higher (p<0.001), whereas peak creatinine was lower (p=0.001) in the IDC group compared with the OE group but was not significantly different from the OC group. There were no significant differences in 1-, 3-, 5- and 10-year patient and graft survival rates between the IDC group and the OE or the OC group.
  
  
  CONCLUSIONS
  Patients with acute liver failure of indeterminate cause seem to differ from those with obvious aetiology in clinical and biochemical presentation but are similar to other controls. The overall long-term outcome seems to be similar in patients with an unknown aetiology as in those with a specific aetiology.
authors.affiliation: Section of Gastroenterology and Hepatology, Department of Internal Medicine, Sahlgrenska University Hospital, Gothenburg, Sweden.
authors.forename: Gu
authors.initials: G
authors.lastname: Wei
authors.forename: Evangelos
authors.initials: E
authors.lastname: Kalaitzakis
authors.forename: Annika
authors.initials: A
authors.lastname: Bergquist
authors.forename: Einar
authors.initials: E
authors.lastname: Björnsson
mesh_terms: D000082:Acetaminophen / Q000009:adverse effects*; D000328:Adult; D018712:Analgesics, Non-Narcotic / Q000009:adverse effects; D006502:Budd-Chiari Syndrome / Q000150:complications*; D018450:Disease Progression; D005260:Female; D005500:Follow-Up Studies; D006525:Hepatitis, Viral, Human / Q000150:complications*; D006801:Humans; D017114:Liver Failure, Acute / Q000175:diagnosis / Q000209:etiology* / Q000601:surgery; D016031:Liver Transplantation; D008297:Male; D008875:Middle Aged; D009145:Mushroom Poisoning / Q000150:complications*; D011379:Prognosis; D012189:Retrospective Studies; D012307:Risk Factors; D013997:Time Factors
chemical_list: D018712:Analgesics, Non-Narcotic; D000082:Acetaminophen