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Cutaneous pseudovasculitis.

J Andrew Carlson1, Ko-Ron Chen

  • 1Division of Dermatology, Albany Medical College, Albany, NY 12208, USA. carlsoa@mail.amc.edu

The American Journal of Dermatopathology
|February 8, 2007
PubMed
Summary
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Cutaneous pseudovasculitis mimics vasculitis, causing bleeding or vessel blockage. Differentiating it from true vasculitis, often via skin biopsy, is crucial for correct diagnosis and treatment.

Area of Science:

  • Dermatology
  • Pathology
  • Internal Medicine

Background:

  • Cutaneous pseudovasculitis encompasses diverse disorders that mimic cutaneous vasculitis.
  • These conditions present with hemorrhage (purpura) or vessel occlusion (livedo, cyanosis, necrosis).
  • Accurate differentiation is vital to avoid incorrect treatments like corticosteroids.

Purpose of the Study:

  • To highlight the heterogeneity of cutaneous pseudovasculitis.
  • To emphasize the importance of distinguishing pseudovasculitis from true vasculitis.
  • To underscore the diagnostic role of skin biopsy.

Main Methods:

  • Review of clinical and histopathological features of pseudovasculitic disorders.
  • Classification based on dominant mechanism: hemorrhagic or cyanotic-infarctive.

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  • Emphasis on diagnostic criteria and differential diagnosis.

    • Main Results:

    • Pseudovasculitis presents as hemorrhagic (vessel wall dysfunction) or cyanotic-infarctive (vaso-occlusion) syndromes.
    • Hemorrhagic forms involve factors like metabolic deposition, nutritional deficiency, or trauma.
    • Cyanotic forms include conditions like purpura fulminans and antiphospholipid antibody syndrome.

    Conclusions:

    • Delayed or incorrect diagnosis of pseudovasculitis can lead to harmful treatments.
    • A high index of suspicion is necessary for diagnosing pseudovasculitic disorders.
    • Absence of vasculitis on skin biopsy strongly suggests pseudovasculitis, guiding further evaluation.