Fig. 1
From: Compressive optic neuropathy due to posterior ethmoid mucocele
Preoperative Brain Magnetic Resonance Imaging (MRI) and Paranasal Sinus Computed Tomography (CT). (A, B) Preoperative brain MRI shows mass on the ethmoidal sinus, with intermediate signal on T1 image (A) and intermediate to low signal intensity on T2 FLAIR image (B). (C, D) Preoperative paranasal sinus CT. (C) Axial scan shows total opacification on the left ethmoidal cell. (D) Coronal scan shows prominent dehiscence of canal wall (arrowheads)