An elderly female with rib osteolytic lesion after recovery from fulminant liver failure induced by acute‐onset autoimmune hepatitis

Key Clinical Message This report highlights an interesting case of an osteolytic lesion (actinomycosis) after fulminant liver failure induced by autoimmune hepatitis (AIH). When treating patients with fulminant liver failure due to AIH using immunosuppressive drugs, such as steroids, the possibility of such rare occurrences should be kept in mind.