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  • Title: Clinical and pathological characteristics of the autoimmune hepatitis and primary biliary cirrhosis overlap syndrome.
    Author: Suzuki Y, Arase Y, Ikeda K, Saitoh S, Tsubota A, Suzuki F, Kobayashi M, Akuta N, Someya T, Miyakawa Y, Kumada H.
    Journal: J Gastroenterol Hepatol; 2004 Jun; 19(6):699-706. PubMed ID: 15151627.
    Abstract:
    BACKGROUND AND AIMS: The defining of the autoimmune hepatitis (AIH) and primary biliary cirrhosis (PBC) overlap syndrome as a separate clinicopathological entity has been controversial and temporally and geographically subjective. METHODS: From 1979 until 2000, 227 patients diagnosed with AIH, PBC or the overlap thereof were treated. Cases with genuine AIH/PBC overlap syndrome were sorted out using close clinical follow up and serial liver biopsies. RESULTS: Of the 227 patients, 19 (8.4%) were diagnosed with the AIH/PBC overlap syndrome. They all cleared a score >10 for the diagnosis of AIH, and tested positive for antimitochondrial antibodies during their courses. Long-term follow up with frequent histological examinations, however, established the diagnosis of AIH/PBC overlap syndrome in only two (0.8%) patients. The most powerful factor distinguishing AIH from PBC was acidophilic bodies in lobules that were detected significantly more frequently in patients with AIH than PBC or spurious overlap syndrome (39/46 [85%]vs 3/85 [4%], P < 0.001). It was more reliable than bile-duct lesions for the distinction of PBC from AIH. CONCLUSIONS: Although AIH/PBC overlap syndrome does exist, it is infrequent and needs to be diagnosed carefully using close clinical and histological follow up to enable timely and effective treatment.
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