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Autoantibody Positivity Rates in Classic and Clinically Amyopathic Dermatomyositis

JAMA Dermatology 10.1001/jamadermatol.2025.3143

September 10, 2025 at 11:00 AM EDT

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This cross-sectional study compares the positivity rates of all commonly tested myositis-specific autoantibodies, myositis-associated autoantibodies, and antinuclear antibody in classic dermatomyositis vs clinically amyopathic dermatomyositis.

Corresponding Author: Victoria P. Werth, MD, Department of Dermatology, Perelman Center for Advanced Medicine, University of Pennsylvania, 3400 Civic Center Blvd, Ste 1-330A, Philadelphia, PA 19104 (werth@mail.med.upenn.edu).

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