Figure 2: (a) Axial CT scan following administration of intrathecal contrast shows a defect with contrast in the right anterior cranial fossa. (b) Coronal CT scan after intrathecal contrast injection shows the fistulous communication between the subarachnoid space of the right temporal fossa and the right sphenoid sinus (Sternberg's canal). (c) Axial CT scan following intrathecal contrast injection showing a defect in the inferolateral wall of the right sphenoid sinus, measuring approximately 3.5 mm (arrow)