is a benign (inactive) brain condition which develops in the arachnoid layer specifically of the meninges. Meningio-ma is responsible for 15% - 25% of brain tumours.

MENINGIOMA: "15 to 25% of all brain tumours are of the meningioma type which typically grow slowly and exert pressure on the brain."
Cite this page: N., Pam M.S., "MENINGIOMA," in, April 7, 2013, (accessed January 16, 2021).