1 INTRODUCTION Autoimmune hepatitis (AIH) is a rare and complex inflammatory liver disease characterised by interface hepatitis, high serum immunoglobulin G level, and autoantibodies.1, 2 Foreign antigens that resemble self‐antigens (molecular mimicry) probably activate naïve CD4+ helper T cells that differentiate and proliferate along cytokine pathways into liver‐infiltrating CD8+ cytotoxic T lymphocytes, antibody‐producing plasma cells, and Th17 lymphocytes.3, 4 Homologous epitopes distant...