Las lesiones de púrpura palpable se inician como máculas y pápulas eritematosas que no desaparecen a la diascopia que evolucionan hacia la formación de placas. En su evolución puden desarrollar vesiculas y ampollas que dan lugar a ulceras superficiales cubiertas de serocostras. |
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Cutaneous vasculitis most often presents as palpable
purpura that is typically a manifestation of benign, localized self-limited
cutaneous disease, often triggered by preceding infection or drug ingestion.
Histologically, it is identified by a neutrophilic infiltrate surrounding
and disrupting small vessels (postcapillary venules) associated with fibrin deposits and nuclear debris (leukocytoclasia). Extravasated red blood cells, purpura, will be found in the adjacent dermis.
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