The external auditory canal makes a slightly s-shaped curve . 外听道形如一S型的曲线。
2.
The external auditory canal makes a slightly s - shaped curve 外听道形如一s型的曲线。
3.
External auditory canal cholesteatoma is a rare disease entity 摘要外耳道珍珠瘤为耳鼻喉临床少见病例。
4.
Myxoma of the external auditory canal is so rare that data on its occurrence is not collected in the pathologic atlas of ear tumors edited by the world health organization . it is not easy to diagnose decause of its rarity and lack of distinguishing symptoms 摘要发生与外耳道的黏液十分罕见，文献上均只见零星的报告，以至世界卫生组未将其列入所偏辑的耳科肿瘤病理图谱中。
5.
An anterior sigmoid sinus tend to be observed when the distance between petrous back wall and external auditory canal is shorter . 5 . 11 / 40 ( 27 . 5 % ) posterior lip of internal acoustic meatus cover facial nerve more than 1 / 3 气化的乳突其颞骨岩部后骨板与外耳道后壁之间距离较大，外耳道后壁和颞骨岩部后硬脑膜之间距离也反映了乙状窦前移程度，该距离愈小，乙状窦愈有前移倾向。
