Autoimmune Hepatitis. A liver disease in which the body's immune system damages liver cells for unknown reasons. PubMed Health Glossary. (Source: NIH-National Institute of Diabetes and Digestive and Kidney Diseases).ombination therapy of ursodeoxycholic acid and corticosteroids for primary biliary cirrhosis with features of autoimmune hepatitis: a meta-analysis. A meta-analysis was performed of RCTs comparing therapies that combine UDCA and corticosteroids with UDCA monotherapy.