Autoimmune Hepatitis (AIH) is a liver disease caused by the body's immune system attacking and destroying liver cells. Scientists believe that there is a genetic factor that makes patients more susceptible to these autoimmune diseases. About 70% of people with AIH are women. The disease progresses chronically and leads to cirrhosis, eventually to liver failure if not treated promptly.

Autoimmune hepatitis is inflammation of the liver that occurs when the body's immune system fights off liver cells. The exact cause of autoimmune hepatitis is currently unknown, but it is possible that genetic and environmental factors interact with the body over time in triggering the disease. Untreated autoimmune hepatitis can lead to cirrhosis and eventually liver failure. However, when diagnosed and treated early, autoimmune hepatitis can often be controlled with medications that suppress the immune system.