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Antibody against liver cytosol (anti-LC1) was proposed in 1988 as a new and very specific immunoserologic marker of autoimmune hepatitis of childhood and young age. In adults, anti-LC1 might be masked by the presence in serum of anti-LKM1, usually associated with antibodies to hepatitis-C virus. We report the case of a 60-year-old woman who had active chronic hepatitis not related to infection by hepatitis C virus, with autoantibody reacting against liver cytosol as the unique marker of autoimmune hepatitis. Treated with corticosteroids (prednisone, 1 mg/kg per day), coagulation disorder, bilirubin, transaminase activity and immunoglobulins normalized in the following months. A year and a half later, autoantibodies anti-LC1 and p-ANCAs were no longer detected. We have only found one report of a young patient with anti-LC1 autoimmune hepatitis who had cirrhosis and portal hypertension, in national publications.

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