Allergic Fungal Sinusitis
Author: JE McClay MD & B Marple MD
Date: 15 October 2002
Over the past 2 decades, allergic fungal sinusitis (AFS) has become increasingly defined. Historically mistaken for a paranasal sinus tumor, AFS now is believed to be an allergic reaction to aerosolized environmental fungi, usually of the dematiaceous species, in an immunocompetent host. This is in contrast to invasive fungal infections that affect immunocompromised hosts, such as patients with diabetes mellitus and patients with AIDS. Most patients with AFS have a history of allergic rhinitis, and the exact timing of AFS development can be difficult to discern. Thick fungal debris and mucin are developed in the sinus cavities and must be surgically removed so that the inciting allergen is no longer present. Recurrence is not uncommon once the disease is removed. Anti-inflammatory medical therapy and immunotherapy are being employed to help prevent recurrence.
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