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  • Title: [Autoimmune pancreatitis and IgG-positive sclerosing cholangitis].
    Author: Díte P, Novotný I, Lata J, Růzicka M, Geryk E, Kianicka B.
    Journal: Vnitr Lek; 2011 Mar; 57(3):254-7. PubMed ID: 21495406.
    Abstract:
    Sclerosing cholangitis is a heterogenous disease. Sclerosing cholangitis with an unknown cause is abbreviated PSC. PSC affects extra- as well as intra-hepatic bile ducts and since this is a permanently progressing fibrous condition, it leads to liver cirrhosis. The disease is often associated with a development of cholangocarcinoma and idiopathic intestinal inflammation. Causal therapy does not exist; liver transplantation is indicated. IgG4 cholangitis differs from PSC in a number of features. This form is, unlike PSC, linked to autoimmune pancreatitis (AIP) as well as other IgG4 sclerosing diseases. Anatomically, distal region of ductus choledochus is most frequently involved. Icterus is, unlike in PSC, a frequent symptom of AIP. There also is a distinctive histological picture--significant lymphoplasmatic infiltration of the bile duct wall with abundance of IgG4 has been described, lymphoplasmatic infiltration with fibrosis in the periportal area and the presence of obliterating phlebitis is also typical. However, intact biliary epithelium is a typical feature. IgG4 can be diagnosed even without concurrent presence of AIP. IgG4 sclerosing cholangitis is a condition sensitive to steroid therapy. At present, there is no doubt that IgG4 sclerosing cholangitis is a completely different condition to primary sclerosing cholangitis. From the clinical perspective, these diseases should be differentiated in every clinician's mind as (a) AIP is treated with corticosteroids and not with an unnecessary surgery, (b) IgG4 sclerosing cholangitis is mostly successfully treated with corticosteroids and the disease is not, unlike PSC, a risk factor for the development of cholangiocarcinoma.
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