mastoid process

Our study showed the following: mastoid process, transverse process of the atlas, and occipital condyle were important signs, superior and inferior suboccipital triangle is the important mark for distinguishing vertebral artery.

研究显示：乳突、环椎横突和枕髁是术中重要的解剖学标志，上、下枕下三角是暴露椎动脉入颅前的一个重要解剖学标志。

After stripping partial mastoid process, a 3.5cm × 3cm bone window at the temporal part was made to expose the anterior part of the sigmoid sinus and temporal dura mater. Many anatomic structures can be observed under microscope when cerebellar hemisphere and temporal lobe were drawn away.

磨除部分乳突后联合颞部开颅，形成一3.5cm×3cm大小的骨窗，暴露并剪开乙状窦前和颞部硬脑膜，牵开颞叶和小脑半球，显微镜下观察所显露的解剖结构。

Objective To improve clinically recognition of the eardrum-mastoid process operation.

目的提高临床对中耳乳突手术的认识.

Results Mastoid process, jugular fossa, and occipital condyle were important signs.

结果乳突、乳孔、颈静脉窝、枕髁都是重要的术中解剖学标志。

External auditory canal and mastoid process were involved in 10 cases, squamous and petrous parts in 8 cases, and middle ear in 7 cases on CT scans. Destruction of ossicles and bony labyrinth were detected in 2 cases, respectively.

CT发现10例都累及外耳道和乳突，8例并累及岩部和鳞部，7例累及中耳，听小骨及内耳骨迷路破坏各2例。