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Nonallergic Rhinitis: Environmental Determinants.

Dennis Shusterman1

  • 1Division of Occupational & Environmental Medicine, University of California, San Francisco, Campus Box 0843, San Francisco, CA 94143, USA.

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|April 17, 2016
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Summary
This summary is machine-generated.

Nonallergic rhinitis (NAR) involves nasal symptoms without allergen sensitivity. It often presents as nasal hyperreactivity to environmental triggers, sometimes termed nonallergic rhinopathy.

Keywords:
Air pollutionAmbient humidityAmbient temperatureChemical irritantsEnvironmentNonallergic rhinitis

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Area of Science:

  • Otolaryngology
  • Environmental Medicine
  • Immunology

Background:

  • Nonallergic rhinitis (NAR) is characterized by nasal symptoms without IgE-mediated sensitization to allergens.
  • The idiopathic subgroup of NAR exhibits nasal hyperreactivity to nonspecific environmental triggers like temperature, humidity, and chemicals.
  • Some clinicians use "nonallergic rhinopathy" for cases lacking mucosal inflammation.

Purpose of the Study:

  • To review environmentally induced nonallergic nasal symptoms and signs.
  • To explore the pathophysiology of nonallergic nasal symptoms related to chemical exposures.

Main Methods:

  • Literature review of studies on nonallergic rhinitis and environmental triggers.
  • Analysis of clinical definitions and diagnostic criteria for NAR and irritant rhinitis.
  • Exploration of pathophysiological mechanisms linked to chemical exposures.

Main Results:

  • NAR encompasses a spectrum of nasal symptoms triggered by environmental factors, not allergens.
  • Nasal hyperreactivity to nonspecific triggers is a key feature, often without inflammation.
  • Irritant rhinitis can develop following significant exposure to airborne chemicals.

Conclusions:

  • Environmental factors play a significant role in nonallergic nasal conditions.
  • Understanding the pathophysiology of chemical-induced rhinitis is crucial for diagnosis and management.
  • Further research is needed to elucidate the mechanisms behind environmentally triggered nasal hyperreactivity.