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Relevance and reproducibility of patch-test reactions to corticosteroids
1Department of Dermatology, University Medical Center, Nijmegen, The Netherlands.
Contact Dermatitis
|May 31, 2001
Summary
Patch testing reveals low reaction rates to most dermatocorticosteroids, with hydrocortisone acetate showing higher, often irritant, reactions. Tixocortol pivalate and budesonide are key markers for identifying corticosteroid allergies.
Area of Science:
- Dermatology
- Allergology
- Contact Dermatitis
Background:
- Dermatocorticosteroids are widely used for inflammatory skin conditions.
- Assessing allergic contact dermatitis to these agents is crucial for patient management.
- Standardized patch testing is essential for accurate diagnosis.
Purpose of the Study:
- To evaluate the frequency and relevance of patch test reactions to dermatocorticosteroids.
- To assess the reproducibility of patch test results for corticosteroids.
- To identify reliable markers for dermatocorticosteroid allergy.
Main Methods:
- Retrospective analysis of patch test data from 1995-1999.
- Inclusion of a corticosteroid series with doubtful and positive reactions.
- Retesting of 15 patients to assess reproducibility of reactions.
- Evaluation of reaction relevance based on clinical assessment.
Main Results:
- Most tested corticosteroids showed low positive reaction rates (0.0%-0.9%) on D2-D3 and D7.
- Hydrocortisone acetate 1% in a specific vehicle exhibited a higher reaction rate, likely due to vehicle irritation.
- Overall reproducibility of patch tests was 47.2%.
- Reproducible positive reactions had higher definite relevance (100%) compared to reproducible doubtful reactions (18.2%).
Conclusions:
- The mean rate of positive reactions to the corticosteroid series is 0.5% on D2-D3.
- Tixocortol pivalate and budesonide are significant indicators for detecting dermatocorticosteroid allergy.
- Patch testing, when interpreted carefully for relevance, aids in diagnosing corticosteroid-induced allergic contact dermatitis.