Marked Long‐Term Improvement in Lung Function in Melanoma Differentiation–Associated Protein 5 Antibody–Positive Dermatomyositis Patients: Experience of a Single‐Center Longitudinal Cohort in North America

In a North American MDA5 antibody-associated DM-ILD cohort treated with aggressive combination immunomodulatory therapy including predominantly mycophenolate, IVIg, and rituximab, disease mortality was low and lung function improved markedly. IL-15, PON1, and MDA5 antibody titers warrant further investigation as disease activity biomarkers in this high-risk population.