耳硬化症的高分辨率CT表现

High-resolutlon CT findings of otosclerosis

目的 探讨耳硬化症的HRCT表现特征.方法 回顾性分析34例61耳临床诊断明确的耳硬化症的HRCT表现.结果 55耳HRCT表现耳囊骨密度减低区,6耳HRCT未发现异常.HRCT表现异常的55耳中,6耳仅表现为前庭窗前方耳囊低密度区,6耳表现为前庭窗前方耳囊低密度区、镫骨底板增厚及耳蜗周围低密度区,11耳表现为前庭窗前方耳囊低密度区、前庭窗后方低密度区及镫骨底板增厚,20耳表现为前庭窗前方耳囊低密度区和镫骨底板增厚,10耳表现为前庭窗前方耳囊低密度区及耳蜗周围耳囊低密度影,2耳仪表现为耳蜗周围耳囊低密度区.结论 HRCT可显示耳囊骨质及镫骨底板异常,有助于进一步证实耳硬化症诊断.

Objective To evaluate HRCT features of otosclerosis.Methods HRCT findings of 61 ears with the diagnosis of otosclerosis based on clinical diagnostic criteria in 34 patients were evaluated retrospectively.Results Hypodense regions in the bony otic capsule were found on HRCT in 55 ears and no abnormality was identified on HRCT in 6 ears.In 55 ears with abnormal HRCT findings, HRCT demonstrated the hypodense region of bony otic capsule anterior to oval window alone in 6 ears, the hypodense region anterior to oval window associated with thicked stapedial footplate and pericochlear hypodensity in 6 ears, the hypodense region anterior to oval window associated with thicked stapedial footplate and hypodensity posterior to oval window in 11 ears, the hypodense region anterior to oval window associated with thicked stapedial footplate in 20 ears, the hypodense region anterior to oval window associated with pericochlear hypodensity in 10 ears, and pericochlear hypodensity in the bony otic capsule alone in 2 ears.Conclusion HRCT can detect abnormalities in the bony otic capsule and the stapedial footplate,contributing to confirming diagnosis of otosclerosis.