A review of the treatment of allergic and invasive fungal sinusitis, as well as a presentation of the first recorded case of a conversion from allergic fungal sinusitis (AFS) to chronic granulomatous invasive sinusitis and the fourth case of invasive fungal sinusitis associated with Curvularia. This immunocompetent patient suffering from chronic AFS converted after repeated high-dose steroid tapers and noncompliance. AFS may present atypically and should be suspected even in immunocompetent patients with sinus disease who report new onset pain and neurologic symptoms. Clinicians should consider the potential complications associated with repeated systemic steroid administration.

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