Fig. 1

Characteristic findings of anti-MDA5 antibody-positive dermatomyositis. A Reverse Gottron’s sign and B exudative erythema, representing characteristic findings of anti-melanoma differentiation-associated gene 5 antibody-positive dermatomyositis. C Dermatopathological findings showed liquid degeneration of the epidermal basement membrane, dermal mucin deposition, and perivascular inflammatory cell infiltration of the dermis. D Computed tomography (CT) findings on first admission. Infiltrative and interstitial shadows are observed just below the pleura