[Primary biliary cirrhosis].

Cause -The exact cause of PBC is unknown. Scientists believe there could be more than one contributing factor. While it does not have the traits of an inherited disease, it does appear more often in some families. People with PBC sometimes have a history of allergies or autoimmune disturbances -that is when the body's immune system recognizes a part of the body as foreign and injures or goes to war against it. Rheumatoid arthritis and lupus are examples of autoimmune disorders.