Sarcoidosis is a multi-organ system disease with no known cause.
It commonly affects the lungs, skin, eye and lymph nodes where the abnormal tissue development is seen in multiple areas. In U.S., the disease is commonly seen in the African- American women and between the ages of 20 and 40. There have also been cases affecting the elderly and children as well. The number of cases in the U.S. is estimated to be 10 to 40 per 100,000 people. Although the triggers for sarcoidosis are not yet known, scientists have figured out that the disease process is a result of abnormal white blood cell activation leading to a formation of granulomas in the tissues.