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Related Concept Videos

Chronic Pharyngitis01:23

Chronic Pharyngitis

Chronic pharyngitis refers to persistent inflammation of the pharyngial mucosa.
Etiology
It often arises from persistent viral or bacterial infections affecting sinuses and tonsils.
Additional contributing factors include inadequate dental hygiene, mouth breathing, recurring tonsillitis, allergic rhinitis, laryngopharyngeal reflux, and exposure to smoke, chemicals, and other environmental pollutants. Allergic reactions to pollen, mold, and pet dander, chronic cough, excessive voice usage,...
Chronic Obstructive Pulmonary Disease III: Chronic Bronchitis Features01:24

Chronic Obstructive Pulmonary Disease III: Chronic Bronchitis Features

Chronic bronchitis is a key phenotype of chronic obstructive pulmonary disease (COPD), characterized by airway-centered inflammation and mucus overproduction. It develops from long-term exposure to harmful particles or gases, most commonly cigarette smoke, which triggers a persistent inflammatory response.Cellular and Structural ChangesInflammation initially affects the large bronchi and later the smaller airways, with infiltration by immune cells, including neutrophils, macrophages, and...
Asthma-III: Symptoms and Complications01:24

Asthma-III: Symptoms and Complications

Asthma, a common chronic respiratory condition, is classified considering the frequency and severity of symptoms alongside lung function impairment. Understanding this classification is essential for appropriate treatment and management. Here's a detailed look at the classification of asthma and its clinical features and complications:
Classification of Asthma
Asthma-II: Pathophysiology and Classification01:26

Asthma-II: Pathophysiology and Classification

Asthma is a prevalent chronic respiratory condition marked by inflammation and hyperresponsiveness of the airways. Its pathophysiology involves complex interactions among inflammatory pathways, immune responses, and neural mechanisms.
Additionally, environmental and genetic factors play crucial roles in determining an individual's susceptibility to asthma and the severity of their condition.
Critical processes in asthma pathophysiology include:
Common Respiratory Disorders01:31

Common Respiratory Disorders

Respiratory disorders, a prevalent health concern globally, are generally divided into two primary categories: upper and lower respiratory tract disorders. The categorization is based on the area of the respiratory system they affect.
Upper respiratory disorders impact the airways above the vocal cords, encompassing areas like the nose, sinuses, and throat. Various conditions fall under this category, including the common cold and allergic rhinitis. These disorders can stem from several causes,...
Anatomy of Respiratory System I: Upper Respiratory Tract01:29

Anatomy of Respiratory System I: Upper Respiratory Tract

The upper respiratory tract plays a vital role in the respiratory system, comprising several structures that facilitate air intake and prepare air for the lungs. It also serves as the first line of defense against pathogens and particles. This tract includes the nose and nasal cavity, the oral cavity, the paranasal sinuses, and the pharynx, each with specific functions and features.
Nose and nasal cavity
The nose and nasal cavity represent the main external openings of the respiratory tract.

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Differences in Biologic Clinical Trials for Chronic Rhinosinusitis With Nasal Polyps-Are We Comparing Apples With Oranges?

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Indirect Treatment Comparison of Tezepelumab Versus Other Biologics in Severe Chronic Rhinosinusitis with Nasal Polyps: A Systematic Literature Review and Network Meta-analysis.

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Depemokimab: A twice yearly anti-IL 5 biologic for chronic rhinosinusitis with nasal polyps (CRSwNP) - A narrative review.

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Reply to: S. N. Katkuri et al. and H. Liu et al. on Early and Sustained Improvements in Sense of Smell With Tezepelumab Treatment in Patients With Chronic Rhinosinusitis With Nasal Polyps (WAYPOINT).

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Related Experiment Video

Updated: May 14, 2026

Acupoint Catgut Embedding Therapy in Traditional Chinese Medicine for Managing Allergic Rhinitis
03:40

Acupoint Catgut Embedding Therapy in Traditional Chinese Medicine for Managing Allergic Rhinitis

Published on: December 20, 2024

Subclassification of chronic rhinosinusitis.

Joseph K Han1

  • 1Division of Rhinology and Endoscopic Sinus and Skull Base Surgery, Department of Otolaryngology-Head and Neck Surgery, Eastern Virginia Medical School, Norfolk, Virginia 23507, USA. hanjk@evms.edu

The Laryngoscope
|February 2, 2013
PubMed
Summary

This study defined distinct chronic rhinosinusitis (CRS) subclasses using histology and biomarkers. These phenotypes aid targeted treatment and research for various CRS conditions.

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Immunofluorescent Labeling in Nasal Mucosa Tissue Sections of Allergic Rhinitis Rats via Multicolor Immunoassay
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Published on: September 22, 2023

Area of Science:

  • Immunology
  • Otolaryngology
  • Pathology

Background:

  • Chronic rhinosinusitis (CRS) presents with diverse subtypes.
  • Accurate phenotyping is crucial for effective management and research.

Purpose of the Study:

  • To phenotype CRS subclasses.
  • To characterize nasal polyps using histology and cellular biomarkers.
  • To differentiate CRS subtypes for targeted therapies.

Main Methods:

  • Prospective case-control study involving 84 subjects.
  • Utilized quality-of-life questionnaires, nasal endoscopy (NE), and computed tomography (CT).
  • Analyzed histopathology, immunohistochemistry (CD markers), and cytokine levels (IL4, IL5, IL13, IL17, IFN-γ) in nasal polyps.

Main Results:

  • NE and CT scores differentiated CRS subclasses from controls (P<.01).
  • Asthmatic sinusitis, AERD, and AFS showed high NE/CT scores, eosinophils, mast cells, and hypercellularity.
  • Distinct cellular and cytokine profiles were identified for nonasthmatic sinusitis and CF-CRS.

Conclusions:

  • Established well-characterized, distinct CRS phenotypes.
  • These defined groups facilitate targeted treatment strategies.
  • Provides a foundation for future CRS research and clinical studies.