Allergic Fungal Rhinosinusitis: Distinct Clinical Features, Diagnostic Challenges, and Evolving Therapeutic Strategies.
Amber U Luong, Saad Alsaleh, Se Hwan Hwang et al.
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Case in brief
The article describes a representative case of unilateral allergic fungal rhinosinusitis (AFRS) in a young, immunocompetent patient. AFRS is characterized by type 2 inflammation, nasal polyps, and eosinophilic mucin containing fungal elements. Imaging can show extensive sinonasal disease with expansile remodeling, sometimes extending toward orbital or intracranial spaces, despite relatively mild reported symptoms. This mismatch can delay recognition. The article reviews diagnostic criteria and pitfalls and describes management centered on endoscopic sinus surgery to remove mucin, followed by long-term topical anti-inflammatory therapy; biologics may be considered as adjuncts in selected patients with refractory disease.
What made this case unusual
The notable diagnostic pitfall is the contrast between extensive, expansile radiographic disease and disproportionately mild symptoms, in a unilateral presentation.
Diagnostic / clinical pearl
In a young, immunocompetent patient, mild symptoms do not exclude extensive AFRS; interpret imaging alongside the characteristic eosinophilic mucin and fungal elements.
Why it matters
Recognizing AFRS as a distinct entity can help avoid unnecessary medical therapy and prevent disease-related complications.