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Riassunto

La dermatite allergica da contatto (DAC) è una reazione infiammatoria della cute a decorso acuto, subacuto o cronico, che consegue all’assorbimento di un antigene attraverso la superficie cutanea, alla sua captazione e processazione da parte di cellule specifiche ospiti della cute (prevalentemente cellule di Langerhans), alla sua successiva esposizione e al conseguente reclutamento di una popolazione di linfociti T sensibilizzati e antigene-specifici. La reazione si sviluppa in due fasi funzionalmente distinte: la sensibilizzazione, che dipende dalla capacità delle cellule di Langerhans (CL) di raccogliere il potenziale allergene e di presentarlo ai linfociti T vergini nei linfonodi regionali, e l’elicitazione, che si manifesta nella sede di penetrazione dell’allergene in individui precedentemente sensibilizzati. Le manifestazioni cutanee sono localizzate, prevalentemente, nella zona di cute esposta al contatto con l’allergene, con tendenza alla diffusione, e anche se raramente, sono possibili quadri di dermatite allergica da contatto sistemica.

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Correspondence to Antonio Cristaudo .

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© 2012 Springer-Verlag Italia

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Cristaudo, A., Laino, L. (2012). Dermatite da contatto da accessori metallici. In: Dermatologia allergologica nel bambino e nell’adolescente. Springer, Milano. https://doi.org/10.1007/978-88-470-2507-3_8

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  • DOI: https://doi.org/10.1007/978-88-470-2507-3_8

  • Publisher Name: Springer, Milano

  • Print ISBN: 978-88-470-2506-6

  • Online ISBN: 978-88-470-2507-3

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