Overview
Definition
Inflammatory myopathy without skin involvement.
Epidemiology
Varies globally depending on genetics, environment, or exposure.
Etiology & Risk Factors
- Autoimmune (CD8+ T-cell mediated).
Clinical Symptoms
- Symmetric proximal muscle weakness (difficulty climbing stairs
- combing hair).
Clinical Approach
Diagnosis
- High CK
- EMG
- Muscle biopsy (endomysial inflammation).
Management
- Systemic corticosteroids
- Methotrexate.
Complications
- Interstitial lung disease.