There were 3 cases with ethmoid sinus involvement.4 cases with orbital apex and postbulbar encroachment,6 patients with combined invasion. (2) 38 cases suffered from middle cranial fossa erosion.

• 结果（1）前颅窝受侵13例，筛窦受侵3例，眶尖、球后受侵4例，两者同时受侵6例。