Polymorphic light eruption

Robert S. Dawe

    Research output: Chapter in Book/Report/Conference proceedingChapter

    Abstract

    This chapter discusses the prevalence, etiology, prognosis and diagnostic tests of polymorphic light eruption (PLE). A commonly postulated mechanism is that PLE might be an autoimmune disorder in which there is an abnormal delayed hypersensitivity to an endogenous molecule rendered antigenic by UV exposure. Treatments can be divided into prophylactic or suppressive. The aim of prophylactic phototherapy is to increase the duration of sunlight exposure required to elicit PLE, and so as to improve the quality of life for those severely affected patients who cannot carry out normal activities because very limited sunlight exposure triggers the eruption. Suppressive treatment should alleviate symptoms (particularly itch), and speed the resolution of PLE when it occurs. A randomized, patient-masked, controlled trial including 25 adults found that narrowband (TL-01) ultraviolet B (UVB) was as effective as psoralen-ultraviolet A (PUVA) in preventing episodes of PLE following a treatment course.

    Original languageEnglish
    Title of host publicationEvidence-based dermatology
    EditorsHywel C. Williams, Michael Bigby, Andrew Herxheimer, Luigi Naldi, Berthold Rzany, Robert P. Dellavalle, Yuping Ran, Masutaka Furue
    Place of PublicationChichester
    PublisherWiley-Blackwell
    Pages586-589
    Number of pages4
    Edition3rd
    ISBN (Electronic)9781118357606
    ISBN (Print)9781118357675
    DOIs
    Publication statusPublished - 2014

    Keywords

    • Polymorphic light eruption (PLE)
    • Prophylactic phototherapy
    • Psoralen-ultraviolet A (PUVA)
    • Ultraviolet B (UVB)

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