In dermatology photopatch tests evaluate the delayed type hypersensitivity that clinically manifests as photodermatoses. This diagnostic test aims to re-create triggering conditions, namely photoallergen + UVA, capable to sustain photodermatoses development. Despite its relatively simple execution, the challenging part remains the result interpretation, in which a mix of experience, clinical training and medical history remain fundamental for establishing the correct diagnosis. In order to minimize the inter-observer variability a validated set of substances were approved by a European Consensus in 2012: 20 substances compose the photopatch test baseline series and additional other 15 substances for special populations. This chapter is centered on photopatch test practical and theoretical aspects in dermatology with a particular focus on methodology.
CITATION STYLE
Pigatto, P. D. M., Pacifico, A., Damiani, G., & Cristaudo, A. (2021). Photopatch Testing. In Clinical Contact Dermatitis: A Practical Approach (pp. 529–532). Springer International Publishing. https://doi.org/10.1007/978-3-030-49332-5_24
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