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Lateral and Middle Sphenoid Wing Meningioma

Last Updated: September 30, 2018

Resection of a Hyperostotic Lateral Sphenoid Wing Meningioma with Intraorbital Extension (Sphenoorbital Meningioma)

Approximately 15 to 20% of all meningiomas arise from the sphenoid wing, with half of them emanating from the lateral and middle portion of this bone. Lateral sphenoid wing meningiomas arise from the pterion and typically grow along the Sylvian fissure.

There are no pathologic or genetic features specific to lateral and middle sphenoid wing meningiomas, although World Health Organization (WHO) class II and III meningiomas are less common in this region of the brain than over the convexities.

Classification

Sphenoid wing meningiomas can be divided into three main groups: 1) meningiomas arising from the anterior clinoid and medial third of the sphenoid wing, 2) meningioma...