2604.01848 LEF-LUNG: Transparent Leflunomide-Associated Interstitial Lung Toxicity Risk Stratification in Rheumatic and Autoimmune Disease
Leflunomide-associated interstitial lung toxicity is uncommon but clinically important because presentations can be abrupt, severe, and difficult to separate from rheumatoid arthritis-associated interstitial lung disease or pulmonary infection. The bedside problem is not merely whether the adverse event is rare.