title: Allergic contact dermatitis in 136 children patch tested between 2000 and 2006.
abstract: BACKGROUND
  Allergic contact dermatitis is often under-recognized in the pediatric population but it may affect greater than 20% of this age group.
  
  
  METHODS
  We conducted a retrospective review of the Mayo Rochester, Jacksonville and Arizona patch test database of all children 18 or younger over a 7-year period (January 1, 2000-December 31, 2006).
  
  
  RESULTS
  One-hundred thirty-six children were patch tested from age 3 to 18. Females constituted 66% of those tested and males 34%. Eighty percent of the children were equally distributed between age groups 11-15 and 16-18, with the remainder being 10 years or younger. Sixty-one percent of the children tested positive to at least one allergen. Fifty-three percent of these reactions were deemed to be of current relevance, 31% questionable relevance, 5% past relevance, and 10% not relevant. Males younger than 10 were most likely to have a positive patch test. However, the percent of positive tests in males decreased with increasing age. Females younger than age 10 were less likely to have a positive test than older females. The most common allergens were nickel, cobalt, gold, and thimerosal.
  
  
  CONCLUSIONS
  In children suspected to have allergic contact dermatitis, 61% were confirmed to have a positive reaction to at least one allergen. The utility of patch testing children whose clinical presentation is suggestive for allergic contact dermatitis is high.
authors.affiliation: Mayo Clinic, Jacksonville, FL 32224, USA. hammonds.lonnie@mayo.edu
authors.forename: L Mark
authors.initials: LM
authors.lastname: Hammonds
authors.forename: Virginia C
authors.initials: VC
authors.lastname: Hall
authors.forename: James A
authors.initials: JA
authors.lastname: Yiannias
mesh_terms: D000293:Adolescent; D000485:Allergens; D002648:Child; D002675:Child, Preschool; D017449:Dermatitis, Allergic Contact / Q000175:diagnosis* / Q000209:etiology; D005260:Female; D006801:Humans; D008297:Male; D010328:Patch Tests
chemical_list: D000485:Allergens