Which historical findings are characteristic of id reaction (autoeczematization)?

Updated: Oct 16, 2020
  • Author: Matthew P Evans, MD; Chief Editor: Dirk M Elston, MD  more...
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Answer

Histopathology of the typical papulovesicular lesion reveals a superficial perivascular lymphohistiocytic infiltrate with a spongiotic epidermis, often with vesiculation. Small numbers of eosinophils may be present in the dermal infiltrate. By definition, infectious agents should not be found in the specimens.


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