Atopic predisposition in cholinergic urticaria patients and its implications

Area of Science:

• Dermatology
• Immunology
• Allergy

Background:

• Cholinergic urticaria (CholU) is a common chronic hives condition triggered by heat or exercise.
• Previous reports suggest a higher prevalence of atopy in CholU patients, but its clinical significance remains unclear.

Purpose of the Study:

• To determine the prevalence and relevance of atopy in patients with cholinergic urticaria.
• To investigate the association between atopic predisposition and disease characteristics in CholU.

Main Methods:

• Thirty CholU patients were evaluated for atopic predisposition using the Erlangen Atopy Score.
• Patients were categorized into atopic and non-atopic groups and assessed for disease severity (CholUSI), activity (CholUAS7), quality of life (DLQI, CU-Q2OL), seasonal patterns, IgE levels, and comorbidities.

Main Results:

• Over half (57%) of CholU patients exhibited atopic predisposition, with higher rates in females.
• Higher atopy scores correlated with increased CholU severity, activity, and quality of life impairment.
• Atopic CholU patients displayed distinct seasonal exacerbation patterns, IgE specificity, and comorbidity profiles compared to non-atopic individuals.

Conclusions:

• Atopic predisposition is significantly linked to cholinergic urticaria, suggesting shared underlying pathogenetic mechanisms.
• Atopic CholU patients experience more severe disease and a reduced quality of life.
• Routine assessment for atopic predisposition is recommended for all patients diagnosed with cholinergic urticaria.