Possible causes include a hypersensitivity response, a genetic predisposition, or chemicals. The incidence is highest among North Americans of African heritage and Northern European Caucasians. Women of African heritage are affected more than men of African heritage. The onset of the disease usually occurs in people between 30 and 50 years old. The incidence is 2 out of 10,000 people.
Sarcoidosis is very rare in young children, if it occurs it is more likely in adolescence.
Therapy may continue for 1 or 2 years, although some affected may require lifelong therapy. Call your health care provider if difficulty breathing , vision changes, palpitations , or other symptoms develop. Organs other than the skin that are commonly affected include the lungs, kidneys, eyes, and joints. Sarcoid causes damage to the lung tissue that heals by scarring. The film shows a diffuse milky and granular appearance in the normally dark lung areas.