Fig. 1.

Anterior skull base meningioma. A 65-year-old-female presented with left blurry vision. (A) T1-weighted axial magnetic resonance imaging (MRI) with gadolinium showing a left clinoidal meningioma. The patient underwent a left pterional craniotomy and tumor resection. (B and C) Intraoperative microscopic views of the tumor (arrow) pre- (B) and postresection (C). Even though the olfactory nerve was tightly adhered to the tumor, the nerve (OLPH) is preserved intact. Observe the anatomic relation of the olfactory nerve with the optic nerve (ON) and internal carotid artery (ICA). D, postoperative axial MRI demonstrates complete tumor resection. Used with permission from Barrow Neurological Institute.