IgG4-related autoimmune hepatitis with pathological characteristics of giant-cell hepatitis: A case report
Abstract Background :Immunoglobulin (Ig)G4-positive plasma cells are thought to be present in some cases of autoimmune hepatitis (AIH), and giant-cell hepatitis (GCH) or synchronous giant hepatocytes are rare in some patients with AIH. Case presentation : A 68-year-old woman was hospitalized with asthenia, poor appetite, and yellow urine for more than 20 days. accompanied by obvious abnormal liver function, elevated IgG and IgG4 levels. Liver biopsy was performed, and the pathology showed extensive proliferation of fibrous tissue, formation of pseudolobules, moderate and severe interfacial inflammation, bridging necrosis and fibrosis, edema of hepatocytes as rosette-forming cells, multinucleated hepatocytes in each portal area, extensive monocyte lymph infiltration, dense plasma cells in the portal area, and positive plasma cells stained by IgG4 (more than 10 per portal area). The pathological diagnosis was IgG4-related AIH and GCH. Methylprednisolone was administered (20 mg/day). Two weeks later, her liver function gradually improved, and the immune indexes began to decline. Conclusion: we report a case of cirrhosis caused by AIH, which has the characteristics of IgG4 correlation and GCH in the hepatic pathology. Whether there is an inevitable relationship between them remains unclear.