Chapter 7: Allergic fungal rhinosinusitis

Area of Science:

• Otolaryngology
• Immunology
• Mycology

Background:

• Allergic fungal rhinosinusitis (AFRS) is a distinct subtype of chronic rhinosinusitis.
• It is characterized by nasal polyps, IgE-mediated fungal hypersensitivity, eosinophilic mucin, and positive fungal stains.
• AFRS predominantly affects immunocompetent individuals, particularly in the southeastern and south-central United States.

Purpose of the Study:

• To investigate the pathophysiology of Allergic Fungal Rhinosinusitis.
• To address ongoing debates regarding the classification and prevalence of AFRS.
• To enhance understanding of this complex sinonasal disease.

Main Methods:

• Review of existing literature on AFRS pathophysiology and classification.
• Analysis of clinical presentations, including symptoms like sinus pressure, hyposmia, and congestion.
• Evaluation of characteristic radiographic findings on computed tomography (CT) scans.

Main Results:

• AFRS exhibits unique radiographic features, including unilateral heterogeneous sinus material with potential bony erosion and expansion.
• The disease commonly presents with sinus pressure, reduced sense of smell (hyposmia), and nasal congestion.
• Research highlights the need for further understanding of AFRS pathogenesis.

Conclusions:

• AFRS is a distinct clinical entity requiring further research into its classification and pathophysiology.
• Current treatment involves a multimodal approach including surgery, irrigations, steroids, and immunotherapy.
• Reducing fungal load and antigenic response is the primary therapeutic goal.