Anterior skull base meningiomas

Olfactory Groove Meningiomas (OGM)
Nomenclature of anterior skull base meningiomas
Planum Sphenoidale Meningiomas
Tuberculum Sellae Meningioma (TSM)

Comparison of OGM and TSM


Factor	OGM	TSM
location	cribriform, frontosphenoid suture	planum sphenoidale, tuberculum sellae
blood supply	ant & pst ethmoidals, middle meningeal, ophthalmic (meningeal branch, ACA & ACoA)†	pst ethmoidal (ACA & ACoA)†
olfactory nerves	superolat	inferolat
optic nerve/chiasm	inferolat	superolat
ACA	pst to posterosuperior	posterosuperior