目的　通过分析中耳胆脂瘤和中耳炎的 CT扫描影像改变 ,探讨胆脂瘤和中耳炎的 CT表现及诊断价值。方法　 30例患者行颞骨岩部 CT扫描 ,将影像表现与手术所见进行对比。结果　鼓室胆脂瘤 93.8%显示 ,骨的侵蚀全部显示 ,砧骨、锤骨破坏 81.8%～ 10 0 %显示 ,鼓室胆脂瘤上鼓室宽度大于中耳炎上鼓室宽度 ,少数骨破坏有硬化边 ( 2 0 % )。结论　高分辨率 CT扫描对慢性化脓性中耳炎合并胆脂瘤患者有较高的应用价值 Objective To investigate the CT findings and diagnostic value of cholesteatoma and otitis media by analyzing the CT scan images of middle ear cholesteatoma and otitis media. Methods Thirty patients underwent CT scan of the petrous bone and petrous bone to compare the imaging findings with the surgical findings. Results Tympanic cholesteatoma 93.8% showed that the erosion of the bone all showed that the tympanic cholesteatoma tympanic cavity width was greater than the otitis media tympanic width 81.8% ~ 100% 0%). Conclusion High-resolution CT scan has high value in the treatment of chronic suppurative otitis media with cholesteatoma