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Related Experiment Videos

Fixed solar urticaria

S Reinauer1, V Leenutaphong, E Hölzle

  • 1Department of Dermatology, Heinrich-Heine-University Düsseldorf, FRG.

Journal of the American Academy of Dermatology
|August 1, 1993
PubMed
Summary
This summary is machine-generated.

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Fixed solar urticaria presents as unusual, localized skin reactions to sunlight. Treatment with H1-antihistamines or controlled sun exposure proved effective in these cases.

Area of Science:

  • Dermatology
  • Immunology
  • Photobiology

Background:

  • Presents three unique cases of solar urticaria manifesting in fixed, localized skin areas.
  • Highlights the unusual presentation of solar urticaria, deviating from typical widespread reactions.

Observation:

  • Observed that wheals appeared in distinct patterns on the same skin areas, reproducible upon irradiation.
  • Action spectra for the condition ranged from 320 to 700 nm, with one case showing inhibition by wavelengths between 280 and 320 nm.

Findings:

  • In vitro irradiation of patient plasma induced wheals specifically at affected skin sites upon intradermal injection.
  • Demonstrated a significant therapeutic response to H1-antihistamines and repeated natural sunlight exposure.

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Implications:

  • Proposes the term "fixed solar urticaria" for this distinct clinical variant.
  • Suggests that localized plasma factors may play a role in the pathogenesis of fixed solar urticaria.
  • Indicates that H1-antihistamines and controlled phototherapy are viable treatment options.