Risk Indicators of Sarcoidosis Evolution-Unified Protocol

The purpose of this study is to develop prediction models that can prognosticate patients with sarcoidosis using clinical data and biological markers that can be obtained during a clinic visit.

Primary Aim/Objective The primary objective of this study is to determine which clinical features measured during a routine clinic visit are risk factors for progression of pulmonary sarcoidosis over the follow-up period in adults with pulmonary sarcoidosis.

Secondary Aim/Objectives The secondary objective is to determine if blood biomarkers measured during a routine clinic visit can improve the risk assessment for progression of pulmonary sarcoidosis over the follow-up period.

The investigators will measure two types of blood markers to achieve this goal:

• Clinically available blood markers that are available in most clinical labs
• Blood proteins and gene expression that reflect interferon inflammation and are not currently available as tests in clinical labs

Inclusion criteria

• Adults with a diagnosis of sarcoidosis over the age of 18
• 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

• Inability to tolerate study procedures as determined by the investigator
• Pregnant or breastfeeding
• 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
• Concurrent interstitial lung diseases such as hypersensitivity pneumonitis or idiopathic pulmonary fibrosis
• Hematocrit (Packed Cell Volume) < 25%