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Diagnostic procedures for eczema patients.

N K Veien1, T Hattel, O Justesen

  • 1Dermatology Clinic, Aalborg, Denmark.

Contact Dermatitis
|July 1, 1987
PubMed
Summary

A study of 7887 eczema patients found specific diagnoses in 68%. Common diagnoses included seborrhoeic dermatitis and contact dermatitis, with allergy testing identifying relevant triggers in many cases.

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Area of Science:

  • Dermatology
  • Allergology
  • Clinical Diagnosis

Background:

  • Eczema diagnosis can be challenging, with a significant portion of cases historically classified as non-specific.
  • Identifying specific causes is crucial for effective patient management and treatment.

Purpose of the Study:

  • To analyze the spectrum of eczema diagnoses in a private practice setting.
  • To evaluate the diagnostic yield of patch testing and immediate-type allergy tests.
  • To investigate the role of specific allergens, including metal salts and balsam of Peru, in causing or exacerbating eczema.

Main Methods:

  • Retrospective analysis of 7887 eczema patient records over 2 years and 4 months.
  • Review of diagnostic procedures including battery patch testing and immediate-type allergy testing.
  • Oral challenge testing with substances identified through patch testing.

Main Results:

  • Specific diagnoses were established in 68% of patients; non-specific eczema in 32%.
  • Most frequent diagnoses: seborrhoeic dermatitis (1351), contact dermatitis (1317), atopic dermatitis (1009), and nummular eczema (822).
  • Patch testing identified relevant allergens in 545 of 3164 tested patients. Immediate-type allergy tests were significant in 86 of 618 patients. Oral challenges confirmed reactions to metal salts (53/156) and balsam of Peru (25/101).

Conclusions:

  • A significant proportion of eczema cases can be assigned specific diagnoses with appropriate investigations.
  • Allergy testing, particularly patch testing, is valuable in identifying triggers for dermatitis.
  • Metal salts and balsam of Peru are common allergens implicated in eczema, even in patch-test-negative individuals.

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