一、解剖学与病理学 (一)大体解剖: 据认为,脑膜瘤起源于蛛网膜,即脑膜的中层。脑膜的外层是硬脑膜,内层是软脑膜。大多数影响前部视路的硬脑膜瘤起源于覆盖在蝶骨上的硬膜鞘。无论是发生在蝶骨板的嗅沟脑膜瘤,还是发生在蝶鞍前部的鞍上脑膜瘤或是发生在蝶骨嵴的脑膜瘤都是起源于覆盖蝶骨的硬膜鞘。 First, anatomy and pathology (a) gross anatomy: It is believed that meningioma originated in the arachnoid, the middle layer of the meninges. The outer layer of the meninges is the dura and the inner layer is the pia mater. Most of the dural tumors that affect the anterior visual pathway originate from a dural sheath that covers the sphenoid bone. Whether it is an olfactory meningioma that occurs in a sphenoid plate, a suprasellar meningioma that occurs in the front of the sella, or a meningioma that occurs in a sphenoid ridge, both are dural sheaths that originate in the covering sphenoid.