title: The association between nuchal nevus flammeus and alopecia areata: a case-control study.
abstract: BACKGROUND
  The association of alopecia areata (AA) with nuchal nevus flammeus (NNF) has been demonstrated by previous studies.
  
  
  OBJECTIVE
  The aim of this study was to investigate whether AA is associated with NNF.
  
  
  METHODS
  199 AA patients and 215 controls without AA were examined for the presence of NNF.
  
  
  RESULTS
  35 patients (17.6%) in the AA group had NNF. In the control group, 20 patients (9.3%) had NNF (odds ratio = 2.08, 95% confidence interval 1.43-2.73; p = 0.013). A statistically significant association was found between the presence of NNF and duration of the AA (p < 0.001). The presence of NNF was associated with severity of AA (p < 0.001).
  
  
  CONCLUSIONS
  The results of our study suggest a link between NNF and AA especially in severer and more chronic forms.
authors.affiliation: Department of Dermatology, Razi Hospital, Tehran University of Medical Sciences, Tehran, Iran.
authors.forename: Maryam
authors.initials: M
authors.lastname: Akhyani
authors.forename: Farshad
authors.initials: F
authors.lastname: Farnaghi
authors.forename: Hassan
authors.initials: H
authors.lastname: Seirafi
authors.forename: Rahman
authors.initials: R
authors.lastname: Nazari
authors.forename: Parisa
authors.initials: P
authors.lastname: Mansoori
authors.forename: Arash
authors.initials: A
authors.lastname: Taheri
mesh_terms: D000293:Adolescent; D000328:Adult; D017668:Age of Onset; D000506:Alopecia Areata / Q000145:classification / Q000150:complications* / Q000235:genetics; D016022:Case-Control Studies; D002648:Child; D002675:Child, Preschool; D006801:Humans; D008875:Middle Aged; D009333:Neck / Q000473:pathology*; D019339:Port-Wine Stain / Q000150:complications*