Rhinosinusitis and Nasal Disorders
Rhinosinusitis and nasal disorders are the disease processes of the nasal cavity and the paranasal sinuses, the air-filled spaces that surround the nose. This area groups the inflammatory, structural, allergic, and vascular conditions that produce nasal obstruction, discharge, facial pressure, loss of smell, and bleeding, and that together account for a large share of rhinology practice in otolaryngology.
Definition
Rhinosinusitis denotes symptomatic inflammation of the nasal mucosa and the paranasal sinuses; nasal disorders is the broader grouping that also includes structural, allergic, and bleeding conditions of the nose and sinuses.
Scope
The area orients the reader to the major clinical entities of the nose and paranasal sinuses: acute and chronic rhinosinusitis, nasal polyposis, nasal obstruction and septal pathology, allergic rhinitis, and epistaxis. It frames how these conditions are defined and classified in current position papers and guidelines, and points to the dedicated topic entries for detail. It is reference-educational and is not a source of individualised diagnostic or treatment advice.
Sub-topics
Core questions
- How are inflammatory conditions of the nose and sinuses defined, classified, and distinguished from one another?
- Which symptoms (obstruction, discharge, facial pressure, smell loss, bleeding) map to which sinonasal entities?
- How do mucosal, structural, allergic, and vascular mechanisms contribute to nasal disease?
- What is the evidence base and guideline framework that organises rhinology?
Key concepts
- Nasal cavity and paranasal sinuses
- Rhinosinusitis (acute vs chronic)
- Nasal polyposis
- Type 2 inflammation
- Nasal obstruction
- Allergic rhinitis
- Epistaxis
- Mucociliary clearance and ostiomeatal complex
Mechanisms
Sinonasal disease arises through several intersecting mechanisms. Mucosal inflammation, driven by infection or by type 2 (eosinophilic) immune responses, produces the oedema, discharge, and polyp formation seen in rhinosinusitis and nasal polyposis. Allergic sensitisation triggers IgE-mediated mucosal reactions that underlie allergic rhinitis. Structural factors such as septal deviation and turbinate enlargement narrow the nasal airway and impair mucociliary clearance through the ostiomeatal complex. Vascular fragility of the nasal mucosa, richly supplied and superficial, underlies epistaxis. The European Position Paper on Rhinosinusitis and Nasal Polyps and the international consensus statements organise these mechanisms into a working classification.
Clinical relevance
Nasal and sinus disorders are among the most common reasons people seek otolaryngology and primary care, and they meaningfully affect sleep, smell, and quality of life. Understanding how the entities are defined and grouped supports critical reading of rhinology evidence and guidelines; the area describes how these conditions are conceptualised and is not a substitute for individual clinical assessment.
Epidemiology
Chronic rhinosinusitis affects roughly one in ten adults in population surveys in Europe and North America, allergic rhinitis affects a substantial and rising fraction of the population worldwide, and epistaxis is experienced by a majority of people at some point in life. Together these conditions impose a large burden on health services and on patient quality of life.
Evidence & guidelines
The European Position Paper on Rhinosinusitis and Nasal Polyps (EPOS 2020), the International Consensus Statement on Allergy and Rhinology: Rhinosinusitis (ICAR-RS 2021), and the AAO-HNS adult sinusitis guideline provide the contemporary framework for rhinosinusitis and polyposis, while the Allergic Rhinitis and its Impact on Asthma (ARIA) initiative anchors allergic rhinitis. These documents define the entities, grade the evidence, and are the reference points for the topic entries in this area.
History
Surgery and study of the paranasal sinuses long predate modern rhinology, but the field was transformed by the introduction of nasal endoscopy and functional endoscopic sinus surgery in the late twentieth century, which made direct visualisation and targeted surgery of the ostiomeatal complex possible. The successive European Position Papers (from 2005 onward) then consolidated definitions and evidence, and the recognition of type 2 inflammation reframed chronic rhinosinusitis with nasal polyps as an endotype-driven disease.
Key figures
- Wytske Fokkens
- Valerie Lund
- Claire Hopkins
- Richard Rosenfeld
- Jean Bousquet
Related topics
Seminal works
- fokkens-2020-epos
- rosenfeld-2015-sinusitis
- orlandi-2021-icar
Frequently asked questions
- What is the difference between rhinitis and rhinosinusitis?
- Rhinitis refers to inflammation of the nasal mucosa, whereas rhinosinusitis refers to inflammation involving both the nose and the paranasal sinuses; because the two compartments are continuous, current terminology favours rhinosinusitis when the sinuses are involved.
- Which conditions does this area cover?
- It covers acute and chronic rhinosinusitis, nasal polyposis, nasal obstruction and septal pathology, allergic rhinitis, and epistaxis, each treated in a dedicated topic entry.