Orbital lesions of sphenoid meningiomas

Meningiomas are common intracranial tumors, second only to gliomas, accounting for about a quarter of all tumors. Meningiomas occur primarily in the arachnoid endothelial cells, so it can occur anywhere in the skull except the brain parenchyma. Occurrence rates are high near the falx, sagittal sinus, and convex surface of the brain, followed by sphenoid condyles, saddle nodules, parasaddles, bromchi, cerebellum and cerebellar pontine angle. Among them, sphenoid ridges, saddle nodules, and para- saddle meningioma can invade the orbit, optic nerve, and cerebral nerve and cause a series of orbital lesions. The sphenoid region is one of the most common tumor sites. Due to anatomy, it is also the most common intracranial tumor that invades the orbit.