Petechiae, Purpura and Vasculitis
Petechiae, Purpura and Vasculitis
Petechiae, Purpura and Vasculitis
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Case Three: Skin Biopsy<br />
• A skin biopsy obtained from a new purpuric<br />
lesion reveals a leukocytoclastic vasculitis of the<br />
small dermal blood vessels<br />
• Direct immunofluorescence demonstrates<br />
perivascular IgA, C3 <strong>and</strong> fibrin deposits<br />
• A skin biopsy is often necessary to establish the<br />
diagnosis of vasculitis<br />
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