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Diseases associated with photosensitivity.

G M Murphy1

  • 1Department of Dermatology, Beaumont Hospital, Dublin, Ireland. gillian@iol.ie

Journal of Photochemistry and Photobiology. B, Biology
|December 18, 2001
PubMed
Summary
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Photosensitive disorders are classified by their cause: direct solar causation or photoaggravation. Understanding these patterns aids in diagnosing and classifying various light-sensitive skin conditions.

Area of Science:

  • Dermatology
  • Photobiology

Background:

  • Photosensitive disorders are broadly categorized into those directly caused by solar exposure and those that are photoaggravated.
  • Examples of solar-induced conditions include polymorphic light eruption and solar urticaria.
  • Photoaggravated diseases encompass conditions like lupus erythematosus, psoriasis, and atopic eczema.

Purpose of the Study:

  • To classify photosensitive disorders based on their relationship with solar exposure.
  • To highlight the role of UV radiation in genodermatoses and drug-induced photosensitivity.
  • To emphasize the clinical utility of recognizing reaction patterns in photodermatoses.

Main Methods:

  • Classification of disorders based on etiological factors (solar exposure vs. photoaggravation).
  • Identification of specific conditions within each category, including genodermatoses and drug/chemical interactions.

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  • Mention of phototesting for determining action spectra.

    • Main Results:

    • Established two primary categories: solar-induced and photoaggravated disorders.
    • Listed numerous examples for each category, including genetic disorders and conditions exacerbated by light.
    • Indicated that the action spectrum is often identifiable through phototesting.

    Conclusions:

    • Clinical classification of photodermatoses is significantly aided by recognizing distinct reaction patterns.
    • Understanding the interplay between UV radiation and various skin conditions is crucial for diagnosis and management.