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Key differences between chronic inducible and spontaneous urticaria.

Mojca Bizjak1,2, Mitja Košnik1,3

  • 1Division of Allergy, University Clinic of Respiratory and Allergic Diseases Golnik, Golnik, Slovenia.

Frontiers in Allergy
|November 1, 2024
PubMed
Summary

Chronic inducible urticaria (CIndU) subtypes exhibit distinct laboratory and clinical features compared to chronic spontaneous urticaria (CSU). This heterogeneity suggests a need for personalized diagnostic and treatment strategies for different urticaria types.

Keywords:
C-reactive proteinblood cell countchronic inducible urticariachronic spontaneous urticariaimmunoglobulin E

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Area of Science:

  • Immunology
  • Dermatology
  • Allergy

Background:

  • Current urticaria guidelines recommend limited laboratory testing for chronic spontaneous urticaria (CSU) and selective testing for chronic inducible urticaria (CIndU) subtypes.
  • The rationale behind these recommendations is not well-explained, necessitating further research into CIndU heterogeneity.

Purpose of the Study:

  • To comprehensively compare the demographic, clinical, and laboratory characteristics of CIndU subtypes with CSU.
  • To improve the understanding of CIndU subtypes and inform diagnostic and therapeutic guidelines.

Main Methods:

  • Retrospective analysis of 567 patients diagnosed with CSU, symptomatic dermographism (SD), cold urticaria (ColdU), cholinergic urticaria (CholU), and delayed pressure urticaria (DPU).

Main Results:

  • Patients with SD, ColdU, and CholU showed lower C-reactive protein (CRP), higher total serum immunoglobulin E (IgE), and increased basophil counts versus CSU patients.
  • DPU patients had significantly higher CRP levels and neutrophil counts compared to CSU patients.
  • Distinct demographic and clinical features, including age of onset and disease duration, were observed across CIndU subtypes.

Conclusions:

  • Significant heterogeneity exists among chronic urticaria subtypes.
  • Distinct immunological and clinical features of CIndU subtypes indicate a need for subtype-specific diagnostic and therapeutic guidelines.
  • A tailored approach to laboratory testing may enhance diagnostic efficacy for chronic urticaria.