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Lichen aureus, a pigmented purpuric dermatosis, presents unique histopathology. This study highlights three cases with deep dermal infiltrates and erythrocyte extravasation, mimicking lymphoproliferative disorders.

Keywords:
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Area of Science:

  • Dermatology
  • Pathology

Background:

  • Lichen aureus is a variant of pigmented purpuric dermatoses.
  • Typical histopathology involves subepidermal lymphocytic infiltrate, extravasated erythrocytes, and hemosiderin.
  • Distinguishing lichen aureus from other conditions can be challenging.

Observation:

  • This report describes three patients presenting with lichen aureus on their extremities.
  • Clinical, dermoscopic, and histopathological findings were consistent across all patients.

Findings:

  • A dense, band-like, and relatively deep dermal infiltrate was observed.
  • Extravasation of erythrocytes and hemosiderin deposition were key features.
  • These findings closely resembled a lymphoproliferative disorder.

Implications:

  • The histopathological features of lichen aureus can mimic more serious conditions like lymphoproliferative disorders.
  • Accurate diagnosis requires careful evaluation of clinical, dermoscopic, and histopathological data.
  • Understanding these similarities is crucial for appropriate patient management and avoiding misdiagnosis.