FIG 1. Patient 11.

A, Coronal high-resolution CT scan, obtained through the sphenoid sinus, shows a defect at the junction of the anterior portion of the lateral wall of the sphenoid sinus on the right side with the floor of the middle cranial fossa (arrow) associated with a meningocele. Note the concave lateral wall on the right side. CSF is seen on both sides of the sphenoid sinuses.

B, Coronal T1-weighted (600/15/2) MR image of the brain clearly depicts brain tissue herniating through the bony defects bilaterally (long arrows). The open arrow points to the CSF in the right sphenoid sinus.

C, Coronal T2-weighted (4600/90/2) MR image of the brain shows herniation of brain tissue (thick arrow) and CSF (arrowhead) bilaterally. Empty sella is also seen (small arrow).