中耳胆脂瘤的HRCT诊断

目的 :探讨中耳胆脂瘤HRCT特征、诊断及鉴别诊断。材料和方法 :回顾性分析 66例中耳胆脂瘤患者术前临床和HRCT检查资料 ,并与手术病理结果对照。结果 :66例中耳胆脂瘤HRCT表现为鼓室 /鼓窦内团块状软组织影和骨质改变 ,包括听骨硬化、移位、破坏 ,盾板破坏及中耳腔扩大 ,有的还伴有乙状窦、天盖、面神经管及水平半规管的破坏。结论 :依据中耳腔内软组织影的分布、形态及骨质改变等特点 ,中耳胆脂瘤可通过HRCT做出诊断和鉴别诊断。

HRCT Diagnosis of Cholesteatoma

Purpose: To explore the high-resolusion CT(HRCT) features, diagnosis and differential diagnosis of cholesteatoma. Materials and Methods: Clinical and HRCT features of 66 cases of cholesteatoma proved by pathology were analysed and correlated with pathologic findings. Results: HRCT findings of choleastoma of the middle ear were abnormal soft-tissue shadows in tympanic cavity and antrum and accompany with bony destruction, including dislocation and distruction of the ossicular chain, the erosion of scutum and enlargment of the tympanic cavity. The sigmoid sinus plate, tegmentum tympani, semicircular canal and facial nerve canal were disrupted in severe cases. Conclusion: HRCT can provide valuable information about the location and shape of the soft-tissue shadows in tympanic cavity and surrounding bony distruction for diagnosing Choleasteatoma.