胆脂瘤型中耳炎的高分辨CT诊断

High-Resolution CT Diagnosis of Tympanic Cholesteatoma

目的探讨高分辨率CT(HRCT)对胆脂瘤型中耳炎的诊断价值。方法对34例经手术病理证实的中耳胆脂瘤的CT征像与手术所见进行对照论证。结果CT诊断胆脂瘤的敏感性最高在上鼓室(81.25%),最低在乳突(50.00%);CT显示胆脂瘤的病理改变为:①窦腔内瘤影;②瘤周围低密度环;③窦、室腔边缘骨质硬化;④窦、室腔扩大和听骨链破坏。结论CT检查对于中耳胆脂瘤的诊断及指导手术有很大帮助。

[Objective]To explore the value of hi - resolution CT diagnosis for tympanic cholesteatoma. [Methods]34 cases of tympanic cholesteatoma were studied on their CT manifestation and operation manifestation. [ Results] The sensitivity of the tympanic chloesteatoma diagnosed by CT scan indicated the highest in the super tympanic cavity （81.24%） and the lowest in the mastoid （50.00% ）. The pathological changes on the tympanic gholesteatoma proved by CT scan were the tumor shadows in the tympanic sinus and cavity, low density ring around the tumor, sclerosing of the bony borders of tympanic sinus and cavity and the enlargement of the tympanic sinus and cavity. [Condusion]CT is of great help for the diagnosis of tympanic cholesteatoma and operation instruction.