How is sarcoidosis diagnosed?

Because the symptoms of sarcoidosis can be so varied and nonspecific, making a positive diagnosis is not always easy. Most people with sarcoidosis are asymptomatic, and close to half of all diagnoses are made through unrelated chest x-rays. In people who do experience symptoms, a doctor may perform tests to rule out other conditions. Following this, a range of diagnostic tools is available depending on the nature of symptoms. Chest x-rays and physical exams are used to find visual evidence of inflammation and granulomas. Blood tests and biopsies are used to look for imbalances in body chemistry that may indicate sarcoidosis. Electrocardiograms (EKGs) and pulmonary function tests may also be used to evaluate the function of certain organs that may be affected.