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Patch testing in discoid eczema

C Fleming1, E Parry, A Forsyth

  • 1Department of Dermatology, Vale of Leven Hospital, Alexandria and Contact Dermatitis Investigation Unit, UK.

Contact Dermatitis
|May 1, 1997
PubMed
Summary
This summary is machine-generated.

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Patch testing is recommended for persistent discoid eczema. This study found 50% of patients had positive patch tests, with allergic contact dermatitis being common and benefiting from allergen avoidance.

Area of Science:

  • Dermatology
  • Allergology

Background:

  • Discoid eczema is a persistent skin condition.
  • Identifying underlying causes is crucial for effective management.

Purpose of the Study:

  • To investigate the prevalence and relevance of allergic contact dermatitis in patients with discoid eczema.
  • To assess the benefit of patch testing in managing discoid eczema.

Main Methods:

  • Retrospective study of 48 patients with persistent or severe discoid eczema.
  • Patch testing was performed to identify potential allergens.
  • Patients were followed up to assess treatment outcomes.

Main Results:

  • 50% of patients (24/48) showed positive patch test reactions.

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  • Clinically relevant allergens included rubber chemicals, formaldehyde, neomycin, chrome, and nickel.
  • 61% of followed-up patients reported benefit from patch testing and allergen avoidance.

    • Conclusions:

    • Allergic contact dermatitis is a significant factor in persistent discoid eczema.
    • Patch testing should be considered for patients with severe or persistent discoid eczema.
    • Allergen avoidance can lead to patient benefit.