A Novel Dermato-Pulmonary Syndrome Associated With MDA-5 Antibodies: Report of 2 Cases and Review of the Literature
Chaisson NF et al. – Melanoma differentiation–associated protein 5 (MDA–5) is a novel autoantibody frequently characterized by interstitial lung disease and a distinct cutaneous phenotype with palmar papules, ulceration, and rash. Virtually all patients have underlying dermatomyositis, but many lack the characteristic clinical myopathy associated with it. In the setting of amyopathic disease, the absence of clinically available biomarkers or clear pathologic diagnosis can complicate effective prognostic and therapeutic intervention. Until recently the presence of MDA–5 antibody associated dermato–pulmonary syndrome was described only in Asian populations.