结果与结论：①该病属后天原发性胆脂瘤；
Result and Conclusion:It is a acquired primary cholesteatoma.
主动脉窦动脉瘤是非常少见的，可以是先天性或后天性的。
Introduction Valsalva sinus aneurysms are rare and can be either congenital or acquired.
听力下降是后天性原发性胆脂瘤的首诊症状。
Decrease in acouesthesia might be the first diagnosed symptom of acquired primary cholesteatoma;
听力下降是后天性原发性胆脂瘤的首诊症状。
Decrease in acouesthesia might be the first diagnosed symptom of acquired primary cholesteatoma;
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