Fig 2.

A 59-year-old woman presenting with CSF rhinorrhea (patient 6). A, Coronal CT image in bone windows showing focal bony dehiscence of the lateral wall of the right SS (solid arrow), with soft tissue attenuation herniating into the SS through the defect (arrowhead). Note the presence of arachnoid pits along the inner table of the contralateral GWS (open arrow) and bilateral pneumatization of the lateral sphenoid recesses (curved arrow). B, Coronal T2-weighted image demonstrating the contents of the herniation from panel A as a cephalocele composed of meninges, CSF, and a portion of the right mesial temporal lobe (solid arrowhead). Note the CSF fluid level within the right SS (open arrowhead). This type 1 SLSC best illustrates the ability of these lesions to simulate a mucous retention cyst.