CT Analysis of External Auditory Canal Deformity due to Dysplasia of Tympanic Part of Temporal Bone

颞骨 鼓部发育不良所致外耳道畸形的CT分析

Study on anatomy of tympanic and mastoid segment of facial nerve temporal bone with oblique sagittal MR scanning

国人 颞骨 内 鼓乳段面神经的MR斜矢状位影像解剖学研究

CT findings of cholesteatoma of the middle ear :( 1 ) abnormal soft-tissue in tympanic cavity and antrum and bone erosion ;

中耳胆脂瘤的CT表现为：（1） 鼓室、 鼓窦内软组织影和 骨质破坏；

METHODS This was a retrospective study including the clinical data of 14 cases of EACC invading tympanic cavity and mastoid from 1998 to 2003 . RESULTS All 14 cases showed different bone erosion in the four walls of external auditory canal with extention to the mastoid .

方法回顾性分析我科1998～2003年收治的侵及 鼓室、乳突的外耳道 胆脂瘤14例患者的临床资料。结果14例患者病变均不同程度破坏外耳道四壁并向后扩展至乳突腔。

Objective To analyze HRCT findings of external auditory canal deformity and to discuss the relationship between the external auditory canal deformity and the dysplasia of tympanic part of temporal bone .

目的分析84耳外耳道畸形的高分辨率CT（HRCT）表现，探讨 颞骨 鼓部发育畸形与外耳道畸形的关系。

The summit of jugular pit protruded into tympanic cavity was12.5 % of specimens and lacked bone substantia was4.0 % of specimens .

颈静脉窝顶突入 鼓室腔者占125%，窝顶有 骨质缺损者见40%。