In this article, we report an unusual case of a temporal lobe meningoencephalocele in a cranial bone (rather than a paranasal sinus) that appeared as a lytic lesion of the pterygoid process.
3-cm lesion of the left skull base and the pterygoid process of the sphenoid bone, anterior to the foramen ovale (figure 1).
The flap was elevated from the underlying palatine bone and pterygoid process of the sphenoid bone.
While traversing the pterygopalatine fossa, we encountered a second fascial layer, which we incised to reveal the anterior aspect of the pterygoid process.
We therefore ascertained that the lesion was a meningoencephalocele that had eroded the inner cortex of the pterygoid process of the sphenoid bone, filled the central portion of this bone, and significantly thinned the outer cortices.