Case report: allergic aspergillosis of the sphenoid sinus: pitfall on MRI.

Recent reports indicate that fungal sinusitis is more common than previously thought. Four different histological subtypes of Aspergillus sinusitis are now recognized. Fulminant Aspergillosis is usually seen in immunosuppressed patients, and chronic invasive Aspergillus sinusitis, allergic Aspergillus sinusitis and Aspergilloma are seen in the non-immunocompromised individual. We present a case of progressive unilateral visual loss in a 30-year-old woman. The unusual magnetic resonance findings and the value of computed tomography are discussed.