title: Psoriasis superimposed on vitiligo: the tricolored vulva.
abstract: OBJECTIVE
  This study aimed to describe 2 cases of vulvar psoriasis and vitiligo resulting in a striking clinical appearance.
  
  
  METHODS
  Case 1 was of a 41-year-old woman concerned about a dark pigmentation around the introitus. Case 2 was of an 80-year-old woman with vulvar itch and red, white, and brown areas.
  
  
  RESULTS
  The vulva in each case showed a tricolored appearance of well-demarcated red, white, and brown colors. Biopsies showed psoriasis superimposed on vitiligo in the red, vitiligo in the white, and normal skin in the brown areas.
  
  
  CONCLUSIONS
  When psoriasis and vitiligo are colocalized, the redness of the psoriasis may mask the vitiligo resulting in a striking red, white, and brown tricolored appearance.
authors.affiliation: 1Hunter Area Pathology Service, Faculty of Health Sciences, University of Newcastle, Newcastle; and 2Riverina Dermatology, Wagga Wagga, NSW, Australia.
authors.forename: Kyi Saw
authors.initials: KS
authors.lastname: Tin
authors.forename: James
authors.initials: J
authors.lastname: Scurry
authors.forename: Delwyn
authors.initials: D
authors.lastname: Dyall-Smith
mesh_terms: D000328:Adult; D000369:Aged, 80 and over; D005260:Female; D006651:Histocytochemistry; D006801:Humans; D007150:Immunohistochemistry; D008853:Microscopy; D011565:Psoriasis / Q000150:complications* / Q000175:diagnosis* / Q000473:pathology; D014820:Vitiligo / Q000150:complications* / Q000175:diagnosis* / Q000473:pathology; D014844:Vulva / Q000473:pathology*; D014845:Vulvar Diseases / Q000150:complications* / Q000175:diagnosis* / Q000473:pathology