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Dermatomyositis with Eosinophils.

Isabella I Sanchez1, Henry O Herrera2, Ashley Elsensohn3

  • 1School of Medicine, University of California Irvine, Irvine, CA 92697, USA.

Dermatopathology (Basel, Switzerland)
|December 22, 2023
PubMed
Summary
This summary is machine-generated.

Dermatomyositis, an inflammatory myopathy, can present with atypical skin findings. This case highlights that eosinophils in skin biopsies, though unusual, may indicate dermatomyositis, especially with intense itching.

Keywords:
connective tissue diseasedermatomyositisdiagnostic pitfalleosinophilspruritus

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Area of Science:

  • Dermatology
  • Immunology
  • Pathology

Background:

  • Dermatomyositis is an idiopathic inflammatory myopathy characterized by muscle weakness and distinct skin manifestations.
  • Typical histopathology includes vacuolar changes, dermal mucin, and lymphocytic infiltrate.

Observation:

  • A patient presented with intensely pruritic papules and plaques suggestive of dermatomyositis.
  • Initial skin biopsy revealed superficial dermatitis with eosinophils, mimicking a drug eruption.

Findings:

  • A subsequent biopsy showed classic dermatomyositis features: vacuolar interface dermatitis with increased mucin and no eosinophils.
  • Intense pruritus correlated with skin lesions exhibiting tissue eosinophilia.

Implications:

  • This case underscores the importance of considering tissue eosinophilia in the differential diagnosis of dermatomyositis.
  • Recognizing atypical histopathology is crucial for accurate diagnosis and timely management of dermatomyositis.