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[Round Table: Urticaria and angioedema: introduction and classification].

E Alonso Lebrero1

  • 1Hospital "Niño Jesús", Madrid, España.

Allergologia Et Immunopathologia
|June 3, 1999
PubMed
Summary

Urticaria and angioedema affect 15-25% of the population. While often mistaken for allergies, these conditions stem from mediator release, with infections and physical triggers being common causes in children.

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Area of Science:

  • Dermatology and Immunology
  • Pediatric Medicine

Context:

  • Urticaria and angioedema are prevalent conditions affecting 15-25% of the population across all age groups.
  • These conditions manifest as distinct types of swelling, with urticaria involving the upper dermis and angioedema affecting deeper tissues.
  • While often associated, urticaria and angioedema present with differing symptoms, including itchiness, pain, and distribution patterns.

Purpose:

  • To define, describe, and discuss common pediatric and adult urticaria and angioedema.
  • To differentiate between acute and chronic urticaria, noting their prevalence in different age groups.
  • To explore the underlying mechanisms, moving beyond the traditional allergic disease model.

Summary:

  • Urticaria and angioedema result from the release of vasoactive mediators, not typically allergic reactions.
  • Histamine is a key mediator, causing vasodilation, increased permeability, and erythema.
  • Clinical history is crucial for diagnosis, with common pediatric triggers including infections, physical stimuli, food allergies, and drug reactions.

Impact:

  • Highlights the psychosocial impact of urticaria on patients and families, including sleep disturbances and altered self-image.
  • Emphasizes that while common in emergency room visits, hospitalization is rare.
  • Underscores the diagnostic challenge of identifying etiologic factors, advocating for targeted clinical evaluation over extensive screening.

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