Defining the Molecular and Radiologic Phenotype of Progressive RA Interstitial Lung Disease

This research study aims to better understand the biological and radiological features (the "molecular and imaging fingerprint") of progressive lung disease that can occur in people with rheumatoid arthritis (RA) — a type called RA-ILD (interstitial lung disease). **You may be eligible if...** - You have a confirmed diagnosis of rheumatoid arthritis - You have been diagnosed with or are suspected of having interstitial lung disease (RA-ILD) - You are willing to provide blood and possibly tissue samples, and undergo lung imaging - You are at least 18 years old **You may NOT be eligible if...** - Your lung disease has a well-established alternative cause (e.g., drug-induced or another connective tissue disease) - You have severe limitations that prevent safe participation in the study procedures - You are unable to provide consent Talk to your doctor to see if this trial is right for you.