摘要：目的：研究儿童外中耳畸形的高分辨率CT(HRCT)表现，为临床诊断和治疗提供准确信息。方法：对临床诊断的外中耳畸形54例(66耳)行HRCT扫描、观察。结果：64耳骨性外耳道闭锁或狭窄；59耳鼓室狭小或闭锁；54耳听骨链发育畸形或缺如；4耳内耳畸形。结论：HRCT能准确显示外中耳畸形的类型、程度，为临床治疗提供重要的参考依据。

    关键词：外中耳；畸形；体层摄影术；X线计算机；儿童

    Abstract：Objective： To discuss HRCT features of the congenital deformities of external and middle ear in children so as to provide accurate information for the diagnosis and treatment.Methods：54 cases(66 ears) with deformities of external and middle ear diagnosed clinically were performed with HRCT. Results： The bone part of the external auditory canal stenosis or atresia occured in 64 ears ......