Internal carotid artery: - 23.81% had ICA protruded into the sphenoid sinus, 17.86% bilaterally with intact bony capsule, 16.67% had the ICA compressed by the tumor, 1.19% covered by tumor Optic nerve: - 8.33% optic nerve protruded into the sphenoid sinus, in which 5.95% protruded bilaterally with intact bony capsule.