Mixed connective tissue disease is an autoimmune disorder, although the cause isn't known. In autoimmune disorders, your immune system — responsible for fighting off disease — mistakenly attacks healthy cells. In connective tissue diseases, your immune system attacks the fibers that provide the framework and support for your body.

This list of autoimmune diseases is categorized by organ and tissue type to help locate diseases that may be similar. Autoimmune diseases qualifiers [ edit] Overview of the qualifiers for the list. Autoimmune diseases [ edit] Major organs [ edit] Glands [ edit] Digestive system [ edit] Tissue [ edit] Autoimmune comorbidities [ edit]

Definition & Facts. Autoimmune hepatitis is a chronic disease in which your body’s immune system attacks the liver and causes inflammation and liver damage. Without treatment, autoimmune hepatitis may get worse and lead to complications, such as cirrhosis.