title: The diagnostic value of liver biopsy.
abstract: BACKGROUND
  Since the introduction of molecular diagnostic tools such as markers for hepatitis C and different autoimmune diseases, liver biopsy is thought to be useful mainly for staging but not for diagnostic purposes. The aim was to review the liver biopsies for 5 years after introduction of testing for hepatitis C, in order to evaluate what diagnostic insights - if any - remain after serologic testing.
  
  
  METHODS
  Retrospective review of all liver biopsies performed between 1.1.1995 and 31.12.1999 at an academic outpatient hepatology department. The diagnoses suspected in the biopsy note were compared with the final diagnosis arrived at during a joint meeting with the responsible clinicians and a hepatopathologist.
  
  
  RESULTS
  In 365 patients, 411 diagnoses were carried out before biopsy. 84.4 % were confirmed by biopsy but in 8.8 %, 6.8 % and 10.5 % the diagnosis was specified, changed or a diagnosis added, respectively. Additional diagnoses of clinical relevance were unrecognized biliary obstruction and additional alcoholic liver disease in patients with chronic hepatitis C. Liver biopsy led to change in management for 12.1 % of patients.
  
  
  CONCLUSIONS
  Even in the era of advanced virological, immunological and molecular genetic testing, liver biopsy remains a useful diagnostic tool. The yield is particularly high in marker negative patients but also in patients with a clear-cut prebiopsy diagnosis, liver biopsy can lead to changes in patient management.
authors.affiliation: Department of Clinical Pharmacology, University of Berne, Switzerland. claudia.spycher@lycos.com
authors.forename: C
authors.initials: C
authors.lastname: Spycher
authors.forename: A
authors.initials: A
authors.lastname: Zimmermann
authors.forename: J
authors.initials: J
authors.lastname: Reichen
mesh_terms: D001706:Biopsy; D006801:Humans; D008099:Liver / Q000473:pathology*; D008107:Liver Diseases / Q000175:diagnosis / Q000473:pathology*; D008111:Liver Function Tests; D012189:Retrospective Studies