title: Leukocytoclastic vasculitis in urticaria induced by sun exposure.
abstract: BACKGROUND
  Solar urticaria manifests itself immediately after solar or artificial light exposure and disappears a little later. Histopathologic findings of solar urticaria are essentially identical to those of classic urticaria.
  
  
  METHODS
  We report a 41-year-old man who developed urticarial lesions some hours after sunlight exposure, which resolved after approximately 1 week. Histologic examination of the lesions evidenced a leukocytoclastic vasculitis.
  
  
  CONCLUSIONS
  In a literature review we found one case of solar urticaria with histologic aspects of leukocytoclastic vasculitis.
authors.affiliation: Department of Clinical and Experimental Pathology and Medicine, Institute of Dermatology, University of Udine, Udine, Italy. giuseppe.stinco@uniud.it
authors.forename: Giuseppe
authors.initials: G
authors.lastname: Stinco
authors.forename: Luca
authors.initials: L
authors.lastname: Di Gaetano
authors.forename: Claudio
authors.initials: C
authors.lastname: Rizzi
authors.forename: Pasquale
authors.initials: P
authors.lastname: Patrone
mesh_terms: D000328:Adult; D006801:Humans; D008297:Male; D013472:Sunlight / Q000009:adverse effects*; D014581:Urticaria / Q000209:etiology* / Q000473:pathology; D018366:Vasculitis, Leukocytoclastic, Cutaneous / Q000209:etiology* / Q000473:pathology