title: Pityriasis rotunda diagnosed in Canada: case presentation and review of the literature.
abstract: BACKGROUND
  Pityriasis rotunda is a rare cutaneous disorder characterized by scaly, circular, well-demarcated, hypo- or hyperpigmented, fine plaques over the trunk and extremities.
  
  
  OBJECTIVE
  We present a case of pityriasis rotunda in a 44-year-old African-Canadian woman who presented to a community dermatology practice in Toronto.
  
  
  RESULTS
  Pityriasis rotunda has been well described in Japan, Italy, and South Africa. It is extremely rare in North America, with nine reported cases to date, the majority of which were diagnosed in the United States.
  
  
  CONCLUSIONS
  Pityriasis rotunda is a rare cutaneous disorder associated with systemic disease. To the best of our knowledge, this is the second report of pityriasis rotunda diagnosed in Canada.
authors.forename: Rebecca L
authors.initials: RL
authors.lastname: Zur
authors.forename: Jonathan
authors.initials: J
authors.lastname: Shapero
authors.forename: Harvey
authors.initials: H
authors.lastname: Shapero
mesh_terms: D000328:Adult; D001706:Biopsy; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D009864:Ontario; D010915:Pityriasis / Q000175:diagnosis*; D012867:Skin / Q000473:pathology*