chronic pigmented purpura

chronic pigmented purpura

any of a group of benign dermatoses of unknown cause, not associated with underlying systemic disease, consisting of minimal inflammation with tiny hemorrhages from capillaries in the upper dermis, visible as red dots on the skin. Included are lichen aureus, pigmented purpuric lichenoid dermatitis, purpura annularis telangiectodes, and Schamberg disease.
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Conditions resulting in inflammatory hemorrhage include leukocytoclastic or necrotizing vasculitis, although a few nonvasculitic conditions can be associated with palpable purpura and include chronic pigmented purpura, pityriasis lichenoides et varioliformis acuta (PLEVA), lymphomatoid papulosis, and erythema multiforme.

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