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Clinical features of dermatomyositis

(A) Typical patient with proximal muscle weakness and diffuse erythematous rash visible at the right knee and both arms. (B) Typical Gottron rash at the knuckles of the interphalangeal joints, sparing the phalanges. (C) Subcutaneous calcifications in the elbow protruding to the skin. (Contributed by Dr. Marinos Dalakas.)

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Associated Disorders

  • Collagen vascular diseases
  • Interstitial lung disease
  • Systemic immune-mediated disorders
  • Vasculitis