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Dermatomyositis presenting with focal scleroderma-like skin changes.

Yaohui Chai1, Tulio E Bertorini, Raja B Khan

  • 1Wesley Neurology Clinic, Memphis, TN 38104, USA. ychai2@uthsc.edu

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Dermatomyositis can present with unique focal scleroderma-like skin changes. These distinct skin manifestations, along with muscle weakness, often improve with immunotherapy.

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Area of Science:

  • Dermatology
  • Rheumatology
  • Immunology

Background:

  • Dermatomyositis is an idiopathic inflammatory myopathy characterized by muscle weakness and characteristic skin rashes.
  • Scleroderma-like skin changes are not typically associated with dermatomyositis.

Observation:

  • A patient with dermatomyositis developed focal, symmetrical scleroderma-like skin changes on the upper arms, shoulders, temporal, and pectoral areas.
  • Skin biopsy revealed increased interstitial mucin, hyperpigmentation, and perivascular lymphocytic inflammation without significant fibrosis.

Findings:

  • The patient's blood work was negative for scleroderma and other connective-tissue diseases.
  • The observed skin lesions exhibited features resembling reticular erythematous mucinosis pathologically.
  • Immunotherapy led to improvement in both the scleroderma-like skin changes and muscle weakness.

Implications:

  • This case suggests dermatomyositis can present with a novel variant of focal scleroderma-like skin lesions.
  • Recognition of this variant is crucial for accurate diagnosis and appropriate management of dermatomyositis.
  • Further research may elucidate the underlying mechanisms of these distinct skin manifestations in dermatomyositis.