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[Polymorphous photodermatitis. Morphology and temporal course].

A Lindmaier1, R Neumann

  • 1II. Universitäts-Hautklinik Wien.

Der Hautarzt; Zeitschrift Fur Dermatologie, Venerologie, Und Verwandte Gebiete
|October 1, 1992
PubMed
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Polymorphous light eruption (PLE) predominantly presents as papular or papular-vesicular skin lesions. Most PLE cases resolve within a week, with lesion onset typically occurring within hours of sun exposure.

Area of Science:

  • Dermatology
  • Photobiology
  • Clinical Medicine

Context:

  • Polymorphous light eruption (PLE) is a common photodermatosis.
  • Understanding PLE's clinical presentation and course is crucial for diagnosis and management.
  • Previous studies have varied in their classification and description of PLE.

Purpose:

  • To describe the clinical characteristics and temporal course of polymorphous light eruption (PLE) in a large patient cohort.
  • To investigate the relationship between sun exposure patterns and PLE morphology.
  • To highlight challenges in PLE classification.

Summary:

  • This study analyzed 318 patients diagnosed with polymorphous light eruption (PLE) between 1985 and 1990.
  • Predominant skin lesion types included papular (47.4%) and papular-vesicular (27.2%), with 31% exhibiting a monomorphous pattern.

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  • Lesion onset occurred rapidly after sun exposure (median 19 hours, 38% within 5 hours), and eruptions typically resolved within a week (median 4 days).

    • Impact:

    • Findings provide a detailed characterization of PLE clinical presentations and natural history.
    • Suggests a correlation between the intensity/duration of light exposure and the resulting clinical morphology of PLE.
    • Underscores the need for standardized terminology and methodology in PLE research and clinical practice.