【摘要】 目的:探讨各向同性下获得性中耳小胆脂瘤的HRCT表现特点。方法:回顾性分析获得性中耳小胆脂瘤39耳,均采用各向同性扫描及多向调整MPR技术进行显示。结果:获得性中耳小胆脂瘤的HRCT表现可分为3型:鼓室回缩囊4耳,松弛部胆脂瘤27耳,紧张部胆脂瘤8耳。结论:①鼓室回缩囊表现为边缘不光滑的含气腔,是未形成实性胆脂瘤前的表现形式;②松弛部胆脂瘤位于上鼓室前外壁,造成听骨链向内移位,骨质破坏以锤骨和鼓室盾板为主;③紧张部胆脂瘤位于鼓室下后壁,造成听骨链向外侧移位,骨质破坏以砧骨长脚和鼓室窦为主。更多还原

【Abstract】 Objective:To study the HRCT findings of acquired small cholesteatoma in the middle ear by the ways of isotrophic scan.Methods:Thirty-nine cases of acquired small cholesteatoma in the middle ear were analyzed retrospectively.All the cases were processed by isotrophic scan and displayed MPR technique.Results:HRCT findings of acquired small cholesteatoma were classified into three types:4 cases of tympanic retraction pockets,27 cases of flaccid part cholesteatomas,8 cases of tense part cholesteatomas.Conclusion:① Retraction pockets appeared as airregulua-rim aerated cavities,which were the findings before solid cholesteatomas;② Flaccid part cholesteatomas were located in the anterior-lateral wall in epitympanum,which caused ossicular chains displace internally.Bone destructions mainly located in malleus and scutum;③ Tense part cholesteatomas were located in posterior-inferior wall,which caused ossicular chains displace laterally,bone destructions mainly located in long process of incus and tympanic sinus.更多还原