Meningioma

• Meningiomas are the most common extrinsic brain tumors and follow glioblastoma multiforme (GBMs) as one of the most common intracranial brain tumors.

• Are a type of slow-growing tumor that forms in the meninges (thin layers of tissue that cover and protect the brain and spinal cord). Meningiomas usually occur in adults.

• The incidence among females is about twice as many as males.

• These are typically slow growing tumors and symptoms depends on the location.

• About %70 of meningiomas have monosomy 22.

• These tumors have hormone receptors for estrogen.

• Meningioma incidence is increased by radiation.

• %90 of meningiomas are located intra-cranially and the remaining are found in the spine.

Meningioma Case presentation:

• 77 year old man with new onset seizure

• MRI scan of his brain showed a large left sphenoid wing  tumor radigraphically consistent with meningioma.

• He underwent frameless stereotactic orbitozygomatic craniotomy and gross total resection of this tumor.