New Developments in Allergic Fungal Rhinosinusitis Pathophysiology and Treatment

Area of Science:

• Immunology
• Otolaryngology
• Respiratory Medicine

Background:

• Allergic fungal rhinosinusitis (AFRS) is a specific type of chronic rhinosinusitis with nasal polyps (CRSwNP).
• It is characterized by eosinophilic mucin containing fungal hyphae and heightened sensitivity to fungi.
• Recent research has focused on fungi-driven inflammatory pathways in chronic respiratory diseases.

Approach:

• This study is a review of current literature on AFRS.
• The review focuses on recent advancements in understanding AFRS pathophysiology and treatment implications.

Key Points:

• Fungal proteinases and toxins contribute to respiratory inflammation in AFRS.
• Patients with AFRS exhibit local sinonasal immunodeficiency and an exaggerated type 2 inflammatory response.
• Dysregulated molecular pathways in AFRS present novel therapeutic targets.

Conclusions:

• Understanding AFRS molecular pathways is crucial for refining diagnostic criteria and treatment strategies.
• The management of AFRS is evolving from oral corticosteroids to novel topical treatments and biologics.
• Insights into fungi-driven inflammation in AFRS may broaden the understanding of general chronic rhinosinusitis inflammation.