title: Positive patch-test reactions to platinum are rare.
abstract: BACKGROUND
  Although contact allergy to some metals is common, patch testing for allergy to platinum is rarely performed.
  
  
  OBJECTIVE
  To determine the prevalence of positive patch-test reactions to platinum in an unselected consecutive group of patients presenting for diagnostic patch testing.
  
  
  METHODS
  Unselected patients who presented with a possible diagnosis of contact dermatitis were tested with a series of allergens, including ammonium tetrachloroplatinate 0.25% aqueous.
  
  
  RESULTS
  Of 446 patients tested, only 2 females showed positive reactions to platinum; one had no other positive reactions, and the other had reactions to other metals.
  
  
  CONCLUSIONS
  Positive patch-test reactions to platinum are rare. However, platinum jewelry may occasionally provoke allergic contact dermatitis.
authors.affiliation: Division of Dermatology, University of Louisville, Louisville, KY, USA.
authors.forename: Joseph F
authors.initials: JF
authors.lastname: Fowler
authors.forename: Jennifer H
authors.initials: JH
authors.lastname: Perryman
authors.forename: Branden
authors.initials: B
authors.lastname: Quinlan
mesh_terms: D002712:Chlorides / Q000009:adverse effects*; D017449:Dermatitis, Allergic Contact / Q000175:diagnosis / Q000453:epidemiology / Q000209:etiology*; D005260:Female; D006801:Humans; D008420:Manufactured Materials / Q000009:adverse effects*; D010328:Patch Tests; D010984:Platinum / Q000009:adverse effects*; D017671:Platinum Compounds / Q000009:adverse effects*; D015995:Prevalence
chemical_list: D002712:Chlorides; D017671:Platinum Compounds; C036919:tetrachloroplatinate; D010984:Platinum