Early Pulmonary Involvement of Anti-CADM-140 Autoantibody-positive Rapidly Progressive Interstitial Lung Disease Preceding Typical Cutaneous Symptoms

We herein report a patient with clinically amyopathic dermatomyositis (CADM) who developed anti-CADM-140 autoantibody in association with rapidly progressive interstitial lung disease (RP-ILD). Chest high-resolution computed tomography (HRCT) revealed early pulmonary involvement preceding typical cutaneous lesions. Primary lesions of patchy peribronchial opacity developed ground-glass opacity and consolidation with architectural distortion and traction bronchiectasis. The possibility of anti-CADM-140 autoantibody-associated RP-ILD should be considered when patchy peribronchial opacity of an unknown cause is visible on chest HRCT.