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.
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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