Clinical and histopathological features of immunoglobulin G4‐associated autoimmune hepatitis in children

We aimed to examine the frequency and the characteristics of immunoglobulin G4 (IgG4)-associated autoimmune hepatitis among pediatric patients with autoimmune hepatitis.Immunostaining for IgG and IgG4 was performed in liver biopsies of 40 pediatric patients with autoimmune hepatitis. The patients with more than 10 IgG4-positive plasma cells/high-power field were defined as IgG4-associated autoimmune hepatitis. Clinic, laboratory, and...