title: [Incidence of fungal involvement in nail psoriasis].
abstract: OBJECTIVE
  Because it is clinically so similar, onychomycosis is one of the most important differential diagnostic considerations in psoriatic nail changes. We determined the frequency of fungal involvement in nails of psoriatic patients.
  
  
  METHODS
  Fungal colonization of the nails of psoriatic patients with and without clinically obvious nail changes was investigated in a collective of 250 patients compared to a group of 102 non-psoriatic persons.
  
  
  RESULTS
  There was no significant difference in the frequency of nail colonization with dermatophytes and moulds between healthy persons and psoriatics. Yeasts were more commonly found in psoriatic nails.
  
  
  CONCLUSIONS
  Nail changes in psoriatic patients are mostly caused by psoriasis. However secondary colonization by yeasts is more common in psoriatic nails than in the general population. It remains to be clarified why dermatophytes are not more common in psoriatic nails.
authors.affiliation: Klinik und Poliklinik für allgemeine Dermatologie der Westfälischen Wilhelms-Universität Münster. staender@uni-muenster.de
authors.forename: H
authors.initials: H
authors.lastname: Ständer
authors.forename: M
authors.initials: M
authors.lastname: Ständer
authors.forename: S
authors.initials: S
authors.lastname: Nolting
mesh_terms: D015897:Comorbidity; D003937:Diagnosis, Differential; D006801:Humans; D014009:Onychomycosis / Q000175:diagnosis* / Q000453:epidemiology; D011446:Prospective Studies; D011565:Psoriasis / Q000175:diagnosis* / Q000453:epidemiology; D012307:Risk Factors