耳硬化症的高分辨率CT表现与病理基础

High-resolution CT findings and pathological basis of otosclerosis

目的探讨耳硬化症的HRCT表现及与病理相关性。方法回顾性分析26例44耳临床诊断明确的耳硬化症的HRCT及临床资料。结果 41耳HRCT表现异常,表现为耳囊骨质密度减低,3耳HRCT未发现异常。26耳仅见前庭窗前方耳囊低密度灶,11耳伴镫骨底板增厚。15耳于前庭窗前方、耳蜗周围见低密度影,5耳伴镫骨底板增厚。结论HRCT在耳硬化症诊断中有重要意义,可明确显示海绵化期病灶,但是对于诊断硬化期病灶仍有困难。

Objective To evaluate the high resolution computed tomography (HRCT) findings and their pathological basis of otosclerosis. Methods 44 ears in 26 patients with a clinical diagnosis of otosclerosis were evaluated retrospectively. Results Hypodense focus within the bony otic capsule in 41 ears were found on HRCT, most commonly anterior to the oval window alone (n=26), with thickened stapedial footplate in 11 ears. In the other 15 of these 41 ears, the hypodense lesion was also surrounded the cochlear, combined with a thickened stapedial footplate in 5 ears. HRCT demonstrated no abnormality in 3 ears. Conclusion HRCT is very useful in diagnosing otosclerosis since it can demonstrate the early spongiotic lesions clearly. But it is challenging to detect the sclerotic lesions.