Allergic rhinitis: definition, epidemiology, pathophysiology, detection, and diagnosis

Area of Science:

• Immunology
• Allergology
• Otolaryngology

Background:

• Allergic rhinitis (AR) is a prevalent yet frequently undiagnosed heterogeneous disorder.
• Symptoms include sneezing, itching, nasal congestion, and rhinorrhea, triggered by allergens like pollen, dust mites, and dander.
• Seasonal allergic rhinitis (SAR) has clear triggers, while perennial AR is harder to diagnose due to symptom overlap with other conditions.

Purpose of the Study:

• To highlight the prevalence and diagnostic challenges of allergic rhinitis.
• To describe the pathophysiology, including early and late-phase responses.
• To emphasize the importance of clinical awareness and diagnostic methods for AR.

Main Methods:

• Review of the characteristics and prevalence of allergic rhinitis.
• Description of the pathophysiology, including genetic components and dual-phase allergic responses.
• Discussion of diagnostic approaches, including symptom recognition and IgE antibody testing.

Main Results:

• AR affects 20-40 million people in the US, with increasing incidence.
• SAR onset is rapid with pollen exposure; perennial AR persists for ~9 months.
• Allergic responses involve early-phase (minutes) and late-phase (4-8 hours) reactions.

Conclusions:

• Accurate diagnosis of AR hinges on recognizing signs and symptoms.
• IgE antibody tests are standard for allergen identification.
• Diagnosis requires confirmation through patient history and evidence of IgE-mediated inflammation.