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Related Concept Videos

Allergic Reactions: Anaphylaxis01:30

Allergic Reactions: Anaphylaxis

Anaphylaxis is a severe, life-threatening hypersensitivity reaction mediated by Immunoglobulin E (IgE) antibodies. When IgE binds to allergens, it triggers the release of mediators– histamine, leukotrienes, and prostaglandins from mast cells and basophils. These mediators cause vasodilation, edema, and inflammation, leading to various symptoms.The primary allergens causing anaphylaxis include food items (e.g., peanuts, shellfish), drugs (e.g., penicillin, asparaginase, corticotropin, heparin),...
Allergic Reactions02:06

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Overview
Asthma I: Introduction01:28

Asthma I: Introduction

Asthma is a chronic inflammatory disorder of the airways characterized by variable airflow obstruction and heightened bronchial responsiveness to a wide range of triggers. The underlying inflammation leads to airway swelling, mucus hypersecretion, and smooth muscle constriction, all of which narrow the airway lumen and impede airflow. Clinically, asthma presents with recurrent episodes of wheezing, shortness of breath, chest tightness, and coughing, symptoms that typically vary in intensity and...
Drugs Used in Upper Respiratory Disorders: Overview01:16

Drugs Used in Upper Respiratory Disorders: Overview

Upper respiratory tract disorders, including viral infections and allergic rhinitis, cause significant discomfort and disrupt daily life. Managing these conditions involves a variety of drugs, such as antihistamines, intranasal steroids, decongestants, antitussives, expectorants, and mucolytics. Specific examples of drugs in each category are provided.
Antihistamines (e.g., Benadryl) block histamines from binding. Histamines are chemicals released during an allergic reaction in the body. As a...
Allergic Drug Reactions01:27

Allergic Drug Reactions

Allergic reactions related to drugs are hypersensitivity responses driven by the immune system and bear no connection to the drug's therapeutic action. While drugs in isolation do not trigger an immune response, they can interact with endogenous proteins to form antigens. These antigens stimulate lymphocytes to produce antibodies. IgE-type antibodies attach themselves to mast cells. Upon subsequent exposure to the same stimulus, the antigen-antibody interaction is initiated, unleashing numerous...
Drugs Used in Lower Respiratory Disorders: Overview01:17

Drugs Used in Lower Respiratory Disorders: Overview

Lower respiratory tract disorders present challenges that often require skilled and nuanced approaches for effective management. Common ailments, such as asthma and chronic obstructive pulmonary disease (COPD), have prompted the development of intricate treatment strategies involving bronchodilators and anti-inflammatory drugs, each tailored to ease breathing and revitalize the lungs.
Bronchodilators, the first step of respiration enhancement, come in various forms, each with its own mechanism...

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Related Experiment Video

Updated: Jun 15, 2026

Immunofluorescent Labeling in Nasal Mucosa Tissue Sections of Allergic Rhinitis Rats via Multicolor Immunoassay
06:08

Immunofluorescent Labeling in Nasal Mucosa Tissue Sections of Allergic Rhinitis Rats via Multicolor Immunoassay

Published on: September 22, 2023

Non-allergic rhinitis: a case report and review.

Cyrus H Nozad1, L Madison Michael, D Betty Lew

  • 1Division of Clinical Immunology, University of Tennessee Health Science Center, 50 North Dunlap St, RM 401 WPT, Memphis, TN, USA. cnozad@uthsc.edu.

Clinical and Molecular Allergy : CMA
|February 26, 2010
PubMed
Summary

Rhinitis diagnosis requires careful consideration beyond common allergies. This case highlights a rare condition mimicking allergic rhinitis, emphasizing the need for a broad differential diagnosis in nasal symptom evaluation.

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Published on: December 20, 2024

Area of Science:

  • Otolaryngology
  • Allergy and Immunology
  • Internal Medicine

Background:

  • Rhinitis presents with symptoms like sneezing and nasal congestion.
  • Allergic rhinitis (AR) is often diagnosed first, but non-allergic rhinitis (NAR) encompasses diverse conditions.
  • NAR pathogenesis is varied and not fully understood, with many conditions mimicking AR/NAR.

Purpose of the Study:

  • To present a case of a rare condition misdiagnosed as allergic or vasomotor rhinitis.
  • To underscore the importance of a comprehensive differential diagnosis for rhinitis.
  • To review potential causes and pathogenesis of non-allergic rhinitis.

Main Methods:

  • Case report presentation.
  • Differential diagnosis discussion.
  • Literature review of non-allergic rhinitis.

Main Results:

  • A rare condition was initially misdiagnosed as typical allergic rhinitis or vasomotor rhinitis.
  • The case illustrates diagnostic challenges in rhinitis management.
  • A review of NAR causes and pathogenesis is provided.

Conclusions:

  • Maintaining a broad differential diagnosis is crucial for rhinitis, even for seemingly common symptoms.
  • Rare conditions can present similarly to allergic rhinitis, necessitating thorough investigation.
  • Understanding NAR's varied etiology is key to accurate diagnosis and treatment.