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Diagnosing Allergic Contact Dermatitis Through Elimination, Perception, Detection and Deduction

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Abstract

Several authors have commented upon the skills of detection required in making a diagnosis of allergic contact dermatitis. Here, we emphasise the search for clues in a systematic manner. We describe four stages as part of a systematic method for diagnosing allergic contact dermatitis. Firstly, elimination (or inclusion) of non-allergic diagnoses. Secondly, perception: the pre-patch test diagnosis and the ‘three scenarios’ principle. Thirdly, detection: optimising the sensitivity of the patch test process. Fourthly, deduction: diagnosing allergic contact dermatitis by associating the dermatitis with the allergen exposure. We further compare and contrast the pre-patch test history and examination with the markedly different one (‘microhistory’ and ‘microexamination’) used after patch testing. The importance of knowledge of contact dermatitis literature is emphasised with a review of recent publications. Finally, we also highlight the use of contact allergy profiling as an investigative tool in the diagnosis of allergic contact dermatitis.

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Acknowledgements

The authors would like to thank David A. Basketter for his valuable comments.

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Correspondence to Korbkarn Pongpairoj.

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No funding was received for the preparation of this review.

Conflict of interest

Korbkarn Pongpairoj, Pailin Puangpet, Supitchaya Thaiwat and John McFadden have no conflicts of interest.

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Pongpairoj, K., Puangpet, P., Thaiwat, S. et al. Diagnosing Allergic Contact Dermatitis Through Elimination, Perception, Detection and Deduction. Am J Clin Dermatol 18, 651–661 (2017). https://doi.org/10.1007/s40257-017-0287-8

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  • DOI: https://doi.org/10.1007/s40257-017-0287-8

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