If your doctor suspects sarcoidosis, he or she will do the following:
Review your medical history
Perform a physical exam
Order chest X-rays and blood tests that may aid in the diagnosis
In 90% of people with sarcoidosis, chest X-rays show abnormalities. Many patients also have a low white blood cell count. Your doctor may also order pulmonary-function tests, which measure how well your lungs are working. Tissue biopsies (tests on small tissue samples) from your lungs may be done to...