Clinical Heterogeneity of Interstitial Lung Disease in Polymyositis and Dermatomyositis Patients With or Without Specific Autoantibodies

MDA5-ILD was associated with severe pulmonary manifestations, poor response to treatment and aggravated prognosis. The ARS-ILD group had favorable treatment response and prognosis. MSN-ILD patients had relatively worse treatment response and prognosis compared to the ARS group, even though they expressed milder pulmonary manifestation.