FIG 4. Coronal turbo spin-echo T2-weighted image (2027/120/6) of the anterior skull base. An expanding retrobulbar mass with low signal intensity is visible in the right orbit (white arrow). The conal muscles are displaced without signs of infiltration (small white arrows). In the medial and upper quadrant of this mass, the optic nerve and its subarachnoid space are clearly visible (open white arrow)