The sigmoid sinus plate,tympanic tegmen, semicircular canal and facial nerve canal were destroyed in severe cases.
The sigmoid sinus plate,tympanic tegmen, semicircular canal and facial nerve canal were destroyed in severe cases.
骨质改变包括中耳腔扩大和周缘骨质硬化、听小骨的移位、破坏、乳突骨质的破坏,严重者可伴有乙状窦壁、鼓室盖、面神经管及半规管的破坏。