螺旋CT在胆脂瘤型中耳炎诊断中的应用

目的：探讨颞骨螺旋CT在胆脂瘤型中耳炎诊断中的作用。方法：回顾性分析经手术及病理证实的104例胆脂瘤型中耳炎患者的CT资料，将手术结果与CT表现进行对比分析。结果：螺旋CT能清楚地显示起源部位不同和大小不等的胆脂瘤的软组织影充填征象及引起的中耳系统细微的骨质破坏征象。术前CT诊断骨壁受侵101耳，而术中发现为90耳，平均符合率为89．1％；术前CT显示胆脂瘤在中耳系统充填部位为108耳，与手术结果平均符合率为94．4％；术前CT诊断听骨链受侵为234耳，而术中证实为209耳，平均符合率为89．3％。结论：螺旋CT对胆脂瘤型中耳炎的诊断，尤其对判定骨质破坏的范围和软组织充填的部位，制定手术方案和评估治疗效果，具有重要的指导意义。

The application of spiral CT in diagnosing the otitis media with cholesteatoma

Objective:To discuss the application of spiral CT imaging of temporal bone in diagnosing the chronic otitis media with cholesteatoma.Method:The clinical data and spiral CT manifestation of 104 cases of chronic otitis media with cholesteatoma were retrospectively analyzed . All the diagnoses were confirmed by operation and pathology.Result:Spiral CT imaging could accurately show the signs of soft-tissue occupancy and bony-erosion of by cholesteatoma in middle ear which originated from various sites and of various sizes. Comparing the CT imaging before surgery and the findings during the operation, the consistency in bone erosion was 89.1%, in soft-tissue occupancy was 94.4% and in invasion of ossicle chain was 89.3%.Conclusion:Spiral CT imaging plays an important role in diagnosing cholesteatoma and especially the bony-erosion and the soft-tissue occupancy, which can provide crucial information for the surgery.