Undifferentiated connective tissue disease (UCTD) is a systemic autoimmune disease. Autoimmunity may cause the immune system to attack specific parts of the body resulting in a variety of problems. The phrase "connective tissue disease" is used to describe the diseases of the immune system that are treated primarily by rheumatologists. When a patient has the features of connective tissue disease but does not fulfill the diagnostic criteria established for any one disease, they are often considered to have "undifferentiated" connective tissue disease. Below you may find medications used to treat or help with Undifferentiated Connective Tissue Disease. More about Undifferentiated Connective Tissue Disease