Urticaria and angioedema

Tara F. Carr, Carol A. Saltoun*

*Corresponding author for this work

Research output: Contribution to journalShort surveypeer-review

22 Scopus citations

Abstract

Urticaria, also known as hives, may affect up to 20% of the population at some time in their lives. Urticaria is characterized by extreme pruritus and described as erythematous, raised, circumscribed lesions with central pallor that blanch with pressure. The pathogenesis of urticaria involves mast cell activation, with subsequent release of histamine and other vasoactive mediators, leading to increased vascular permeability of postcapillary venules and development of edema, erythema, and pruritus. Urticaria is closely associated with angioedema in 40% of individuals; ∼10% of patients experience angioedema without urticaria. Urticarial lesions often are generalized with multiple lesions in no specific distribution; angioedema tends to be localized, commonly affecting the face (periorbital and perioral regions), tongue, uvula, soft palate or larynx, extremities, and genitalia. Urticaria is subdivided into acute and chronic urticaria based on duration of symptoms. Acute urticaria lasts 6 weeks is designated as chronic urticaria, and an etiology is seldom identified and thus considered idiopathic. Chronic urticaria may have an autoimmune basis. There is a well-documented association between autoimmune hypothyroidism (Hashimoto's disease) and urticaria and angioedema with higher incidence of antithyroid (antithyroglobulin and antiperoxidase) antibodies in these usually euthyroid patients. Furthermore, studies have revealed a circulating IgG antibody directed against the IgE receptor (F RIα) or IgE in 40-60% of patients with chronic urticaria. Histamine 1-receptor antagonists (antihistamines) are initial therapy.

Original languageEnglish (US)
Pages (from-to)S70-S72
JournalAllergy and asthma proceedings
Volume33
Issue numberSUPPL. 1
DOIs
StatePublished - May 1 2012

ASJC Scopus subject areas

  • Immunology and Allergy
  • Pulmonary and Respiratory Medicine

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