Meningioma

OVERVIEW
Tumors of the meninges most commonly found intracranially over the cerebrum
Usually solitary masses; occasionally multiple
May occur as plaque-like masses on the floor of the calvaria, paranasally, or (rarely) in a retrobulbar location in dogs more than cats; also develop along the spinal cord but less frequently and with an intradural, extramedullary predilection site
Compress the adjacent tissue, causing vasogenic edema
Dogs—tends to be more invasive into brain parenchyma or surrounding vasculature