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  • Title: Features of autoimmune hepatitis in primary sclerosing cholangitis: an evaluation of 114 primary sclerosing cholangitis patients according to a scoring system for the diagnosis of autoimmune hepatitis.
    Author: Boberg KM, Fausa O, Haaland T, Holter E, Mellbye OJ, Spurkland A, Schrumpf E.
    Journal: Hepatology; 1996 Jun; 23(6):1369-76. PubMed ID: 8675153.
    Abstract:
    Overlapping features between primary sclerosing cholangitis (PSC and autoimmune hepatitis (AIH) have previously been noted. To assess systematically similarities between these disorders, we have evaluated 114 PSC patients (36 women; 78 men), all confirmed by endoscopic retrograde cholangiography (ERC), according to a scoring system proposed by The International Autoimmune Hepatitis Group for the diagnosis of AIH. The scoring system attributes positive or negative scores to the parameters sex, ratio of elevation of serum levels of alkaline phosphatase (ALP) vs. aminotransferase, serum levels of immunoglobulins and autoantibodies, viral markers, history of drug and alcohol intake, genetic factors, liver histology, and response to therapy. Two of the PSC patients (2%) obtained scores above 15 before treatment, satisfying the diagnostic criterion of "definite" AIH. Thirty-eight patients (33%) scored between 10 and 15 points and could be classified as "probable" AIH. The serum level of immunoglobulin G (IgG) was elevated in 68 patients (61% of 111 cases tested), and positive titers of antinuclear antibodies (ANA) or smooth muscle antibodies (SMA) were detected in 24 patients (22% of 111 cases tested). Thirty-five of the PSC patients (33% of 105 evaluable biopsy specimens) obtained positive scores for histological features similar to those of AIH, but the total score for histology was in the negative range in 72 patients (69%) because of the presence of biliary changes. The frequent finding of high scores in PSC patients underlines the similarities PSC may have with AIH. A modification of the scoring system, in particular by increasing the negative score for histological biliary changes, would improve its potential to discriminate between AIH and PSC.
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