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Ethmoidal mucocele. In (A) an abnormal enhancement of the intraconal space surrounding the optic nerve can be seen. This indicates intraorbital and intraconal inflammation caused by the expanding mucocele. (B) shows an enlarged ethmoid cell and a bony defect between this nasal sinus and the tip of the orbit due to the enlarging sinus. (A) Coronal T1-weighted sequence with fat suppression. (B) Axial CT scan.
