Anterior skull base meningioma classification

Sphenoid wing meningioma are one half.

Frontobasal meningiomas, are the other one half.

Midline anterior skull base meningiomas include olfactory groove meningiomas (OGMs), Tuberculum Sellae meningiomas (TSMs), and planum sphenoidale meningiomas (PSMs).

Meningiomas of the anterior cranial fossa represent 12%–20% of all intracranial meningiomas.