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Bronchial hyperresponsiveness in atopic dermatitis.

G M Corbo1, E Ferrante, B Macciocchi

  • 1Centro Auxologico Italiano, Divisione di Pneumologia Pediatrica, Verbania.

Allergy
|November 1, 1989
PubMed
Summary
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A significant number of children with atopic dermatitis (AD) exhibit bronchial hyperresponsiveness and skin reactivity. Early evaluation of bronchial responsiveness is recommended for children diagnosed with AD.

Area of Science:

  • Allergy and Immunology
  • Pediatrics
  • Pulmonology

Background:

  • Atopic dermatitis (AD) is a chronic inflammatory skin condition.
  • Asthma and allergic rhinitis are common comorbidities in AD patients.
  • Bronchial hyperresponsiveness (BHR) and immediate skin reactivity are key features of allergic airway diseases.

Purpose of the Study:

  • To investigate the prevalence of bronchial asthma, immediate skin reactivity, and bronchial hyperresponsiveness in children with AD.
  • To explore potential associations between these conditions and demographic factors.

Main Methods:

  • A study was conducted on 40 patients diagnosed with atopic dermatitis.
  • Patients underwent assessment for bronchial asthma, immediate skin reactivity (skin prick testing), and bronchial hyperresponsiveness (methacholine challenge test - PC20 Mch).

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Main Results:

  • Eight patients reported a history of asthma.
  • Twenty-nine patients (72.5%) were identified as responders to the methacholine test (PC20 Mch < 64 mg/ml), indicating bronchial hyperresponsiveness.
  • Twenty-one patients (52.5%) showed positive skin reactions.
  • No significant difference in skin reactivity was observed between methacholine responders and non-responders.
  • Males were more likely to have asthma and be methacholine responders compared to females.
  • Methacholine responders had an earlier age of onset for AD than non-responders.

Conclusions:

  • A high prevalence of bronchial hyperresponsiveness and skin reactivity exists in children with atopic dermatitis.
  • Gender and age of onset may be associated with the development of respiratory symptoms in AD.
  • Routine evaluation of bronchial responsiveness is suggested for pediatric patients with atopic dermatitis to facilitate early diagnosis and management of potential asthma.