Dermatomyositis: Prevalence, Clinical Spectrum, Diagnostic Approach, and Management Strategies

Dermatomyositis is a rare, inflammatory myopathy with signature cutaneous manifestation and variable degrees of muscular and systemic involvement. Clinical phenotypes range from muscle-predominant disease to amyopathic presentations, leading to diagnostic complexity and heterogeneity in disease trajectory. Immunologic testing reveals myositis-specific autoantibodies that associate with characteristic clinical patterns, pattern of organ involvement, and prognostic implications, including interstitial lung disease and malignancy. The absence of definitive serologic markers in all cases of dermatomyositis requires a comprehensive diagnostic approach integrating clinical features, supportive testing, and histopathologic evaluation in dermatomyositis. Current management approaches include systemic glucocorticoids, conventional and emerging immunosuppressive therapies, and intravenous immunoglobulin. Moving forward, improved understanding of disease heterogeneity and immune pathways is expected to influence personalized approaches to diagnosis and treatment in dermatomyositis. This critical review article integrates current evidence on the epidemiology, clinical presentation, diagnostic framework, systemic association, and management of dermatomyositis, highlighting ongoing challenges and future directions in the care of this intricate autoimmune disorder.