fig2

Figure 2. Anatomical environment and structures often related to anterior skull base meningioma. A: axial overview; B: sagittal view of the sellar region and structures in its vicinity that may be involved especially in tuberculum sellae and planum sphenoidale meningiomas; C: view of the optic apparatus and the neighboring vasculature. A1: first segment of anterior cerebral artery; ACP: anterior clinoid process; DS: dorsum sellae; ICA: internal carotid artery; MCA: middle cerebral artery; OC: optic chiasm; ON: optic nerve; PG: pituitary gland; PS: planum sphenoidale; PST: pituitary stalk; TS: tuberculum sellae; III: third ventricle