Sarcoidosis is a disease of unknown cause that leads to inflammation. It can affect various organs in the body. The outcome of sarcoidosis varies. The disease leads to organ damage in about one-third of the people diagnosed with it. Damage may occur over many years and involve more than one organ. Rarely, sarcoidosis can be fatal. Test your knowledge about sarcoidosis risk factors and symptoms. Learn how the disease affects the body and steps you can take to manage the disease if you have it.