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Individual variation in nickel patch test reactivity.

M Hindsén1, M Bruze, O B Christensen

  • 1Department of Occupational and Environmental Dermatology, University Hospital, Malmö, Sweden.

American Journal of Contact Dermatitis : Official Journal of the American Contact Dermatitis Society
|June 5, 1999
PubMed
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Nickel allergy patch test results vary significantly between individuals and over time, even in patients with a confirmed nickel allergy. This variability impacts diagnostic accuracy and patient management in allergic contact dermatitis.

Area of Science:

  • Dermatology
  • Allergology
  • Immunology

Background:

  • Patch test reactions can be influenced by various factors including hormones, medications, and UV radiation.
  • Individual variability in allergic responses is a known phenomenon in dermatology.

Purpose of the Study:

  • To investigate the individual variations in nickel patch test reactivity.
  • To explore the potential influence of the menstrual cycle on nickel allergy testing.

Main Methods:

  • Thirty women with diagnosed nickel allergy participated in the study.
  • Patch tests using serial dilutions of nickel sulfate were performed over a 7-month period on four separate occasions.
  • Patients were categorized into two groups based on the presence of atopy and hand eczema.

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Main Results:

  • No patient exhibited consistent patch test reactivity across all four testing occasions.
  • The highest observed variation in reactivity for an individual was a 250-fold difference.
  • Two patients presented with completely negative patch test reactions on at least one occasion.

Conclusions:

  • Significant individual variation in nickel reactivity exists and is crucial for clinical consideration.
  • Negative patch test results in patients with a history of nickel allergy warrant further investigation due to potential reactivity fluctuations.