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Related Experiment Videos

Photoallergic contact dermatitis.

An Goossens1

  • 1Contact Allergy Unit, Department of Dermatology, Katholieke Universiteit Leuven, B-3000 Leuven, Belgium.

Photodermatology, Photoimmunology & Photomedicine
|May 18, 2004
PubMed
Summary
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Photoallergic contact dermatitis, often caused by sunscreens and NSAIDs, may be more common than previously thought. Its varied clinical presentation and potential for cross-reactions can lead to underdiagnosis.

Area of Science:

  • Dermatology
  • Photodermatology
  • Contact Dermatitis

Background:

  • Photoallergic contact dermatitis (PACD) is a light-induced skin reaction.
  • Its prevalence and clinical spectrum are often underestimated.

Purpose of the Study:

  • To assess the frequency of PACD.
  • To review its clinical features and identify causative agents.

Main Methods:

  • Literature review of photoallergic reactions.
  • Discussion of recent photoallergens and clinical presentations.

Main Results:

  • Various topical substances cause PACD, some frequently.
  • Clinical features can be atypical, affecting diverse body areas.
  • Non-steroidal anti-inflammatory drugs (NSAIDs) and sunscreen agents are significant culprits.

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Conclusions:

  • PACD occurrence may be underestimated due to misleading clinical signs and infrequent photopatch testing.
  • Cross-reactions between chemically similar or dissimilar substances are common.
  • NSAIDs like ketoprofen can cause persistent light reactions.