Which conditions should be included in the differential diagnoses of diagnosis of papular urticaria?

Updated: Apr 17, 2019
  • Author: Robert A Schwartz, MD, MPH; Chief Editor: Dirk M Elston, MD  more...
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Answer

Answer

The histopathologic differential diagnosis of papular urticaria includes other spongiotic dermatitides, pityriasis lichenoides et varioliformis acuta, the pruritic papular eruption of human immunodeficiency virus (HIV) disease, and papulonecrotic tuberculid. Papular urticaria with marked spongiosis and a dense inflammatory cell infiltrate cannot be reliably distinguished from arthropod bites on clinical and histopathologic grounds.


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