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Published on: September 22, 2023
Allergic fungal rhinosinusitis: diagnosis and management
Matthew W Ryan1, Bradley F Marple
1Department of Otolaryngology, The University of Texas Medical Branch, Galveston, Texas 77555-0521, USA. mwryan@utmb.edu
Purpose Of Review:
The proper diagnosis and treatment of allergic fungal rhinosinusitis remain controversial. We discuss recent additions to the literature regarding diagnosis and treatment of this condition.
Recent Findings:
There is considerable overlap in the clinical features of allergic fungal rhinosinusitis and other forms of eosinophilic mucin chronic rhinosinusitis. Type 1 hypersensitivity and characteristic computed tomographic findings may have predictive value for a final diagnosis of allergic fungal rhinosinusitis, patients with which are more likely to have bony erosion than patients with other forms of chronic rhinosinusitis. The decreases in orbital volume associated with expansive allergic fungal rhinosinusitis disease may spontaneously improve after successful treatment. Most patients have detectable fungal-specific IgE in their so-called allergic mucin. Elevated levels of fungal-specific IgG3 are a consistent finding in patients with allergic fungal rhinosinusitis and eosinophilic mucin chronic rhinosinusitis. Antifungal treatment is still considered a treatment option, but further study is needed.
Summary:
Type 1 hypersensitivity to fungal antigens helps to distinguish allergic fungal rhinosinusitis from other forms of eosinophilic mucin chronic rhinosinusitis. Bony erosion and orbital expansion giving rise to proptosis are prominent features of allergic fungal rhinosinusitis. Advances in medical treatment will require prospective and controlled trials.
Insights
Allergic fungal rhinosinusitis diagnosis is challenging. Key indicators include fungal-specific IgE and IgG3, bony erosion, and Type 1 hypersensitivity, aiding differentiation from other eosinophilic chronic rhinosinusitis forms.
Area of Science:
- Otolaryngology
- Allergy Immunology
Background:
- Allergic fungal rhinosinusitis (AFRS) diagnosis and management are debated.
- Significant overlap exists between AFRS and other eosinophilic mucin chronic rhinosinusitis (EMCRS) forms.
Purpose of the Study:
- To review recent literature on diagnosing and treating AFRS.
- To identify distinguishing features of AFRS.
Main Methods:
- Literature review of recent studies on AFRS.
- Analysis of clinical features, imaging, and immunological markers.
Main Results:
- Type 1 hypersensitivity to fungi and specific CT findings may predict AFRS.
- AFRS patients exhibit higher rates of bony erosion and orbital expansion compared to other EMCRS.
- Fungal-specific IgE is common in allergic mucin; elevated fungal-specific IgG3 is consistent in AFRS and EMCRS.
Conclusions:
- Type 1 fungal hypersensitivity is crucial for differentiating AFRS from other EMCRS.
- Bony erosion and orbital expansion are characteristic of AFRS.
- Further prospective, controlled trials are needed to advance medical treatment for AFRS.
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