Two Cases of Allergic Fungal Sinusitis with Differing Postoperative Course

Figure 1

Image findings of Case 1 at the initial diagnosis. (a, b) Computed tomography images of the paranasal cavity (coronal section); bone thinning is evident (white arrow). (c) Gadolinium- (Gd-) enhanced T1-weighted MRI of the paranasal cavity (sagittal section). (d) Gd-enhanced T1-weighted image (coronal section). (e) T2-weighted image (axial section). (f) T2-weighted image (coronal section). Slightly high signals are evident at the paranasal sinus mucosa or nasal mucosa in the T1-weighted images, and a robust enhancing effect is evident in the Gd-enhanced image. Nonsignal regions are evident at the frontal, ethmoid, and sphenoid sinuses, along with an area showing low- to faint-high signal, indicating the possibility of allergic mucin in the nasal cavity. In the T2-weighted image, the paranasal sinus mucosa or nasal mucosa shows high signal levels, and most of the area with possible allergic mucin shows a low signal level.

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