Abstract
Otosclerosis begins in the second and third decades of life but usually does not produce a hearing loss until after the fourth decade. Chalky white plaques in the tympanic membrane may be benign, but when associated with hearing loss may point to tympanosclerosis. Presbycusis is the most common cause of hearing loss. Unilateral hearing loss raises the specter of acoustic neuroma.
摘要
耳硬化症始于生命的第二个和第三个十年，但通常直到第四个十年之后才会导致听力损失。鼓膜上的白色粉笔样斑块可能是良性的，但当与听力损失相关时，可能提示鼓室硬化症。老年性聋是听力损失最常见的原因。单侧听力损失提示听神经瘤的可能。
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