Lack of liver histological evaluation in addition to a probability score of 15 including -3 points for AST level > 3 times the upper limit of normal, 3 points for IgG level > 2 times the upper limit of normal, 3 points for high titers of ANA and ASMA, 3 points for negative viral markers, 1 point for no consumption of hepatotoxic drugs, and 2 points for no consumption of alcohol revealed a probable AIH in the presented case. The gene discussed is BTG3; the disease is autoimmune hepatitis.