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慢性中耳炎是听骨链中断最常见的原因。砧骨因位于鼓窦入口且血运较差,最易受侵犯,而且破坏通常较锤骨严重。Rupa等[1]曾对113块胆脂瘤听骨进行研究,破坏最明显的部位是砧骨
Chronic otitis media is the most common cause of ossicular chain disruption. The incus is most susceptible to invasion due to its poor blood supply due to its entrance to the drum and the damage is usually worse than that of the malleus. Rupa et al [1] had 113 cases of cholesteatoma study of bone, the most obvious site of destruction is the incus