MRI in Patients with Fungal Sinusitis; Usefulness for Diagnosis.

概要

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Four patients with a pathological diagnosis of fungal sinusitis were tested with magnetic resonance imaging (MRI). The characteristic MRI findings were: 1) comparatively low signal shadow on both T 1 weighted images and T2 weighted images with clear borders and homogeneous signal; 2) signal void spots; 3) high intensity enhancement all around the inner wall of the maxillary sinus, fonticulus nasi, after contrast with Gd-DTPA.The MRI findings appear to be more characteristic of fungal sinusitis than the CT findings. However air, desiccated secretions, mycetomas, acute hemorrhage, calcium, bone, and enamel all produce signal void spots on MRI. It is impossible to differentiate them from one another by MRI, but it is possible with CT. We should use both MRI and CT to diagnose fungal sinusitis. At present CT appears to be a more reliable first examination, with MRI being used to confirm CT findings.
耳鼻咽喉科臨床学会の論文