Risk Indicators of Sarcoidosis Evolution-Unified Protocol

Inclusion Criteria: 1. Adults with a diagnosis of sarcoidosis over the age of 18 2. Case definition: we will follow the 1999 statement on sarcoidosis published by the American Thoracic Society for diagnosis which includes tissue biopsy confirmation and exclusion of alternative diagnoses including beryllium sensitization/chronic beryllium disease, mycobacterial, viral, and/or fungal infection Exclusion Criteria: 1. Inability to tolerate study procedures as determined by the investigator 2. Pregnant or breastfeeding 3. Concurrent medical diagnoses that would influence the expression of biomarkers will be considered an exclusion criterion. This includes diseases such as common variable immunodeficiency, HIV infection, or autoimmune diseases 4. Concurrent interstitial lung diseases such as hypersensitivity pneumonitis or idiopathic pulmonary fibrosis 5. Hematocrit (Packed Cell Volume) \< 25%