患慢性中耳炎时,砧骨长脚的末端是听骨中最易受破坏的部位。在鼓膜正常的传导性聋病例中,有起因于早期患过中耳炎导致该部坏死者。砧骨长脚末端易受损害的原因是由于该部悬于鼓室和缺少血液供应的解剖学特点。为了正确理解这一现象,应观察未患过中耳炎者此部位的组织学形态。作者观察了生前无症状的颞骨标本,发现砧骨长脚末端的形态是多种多样的。 When suffering from chronic otitis media, the end of the incus longus is the most vulnerable site in the ossicle. In the case of normal eardrum with conductive deafness, there is a person who has had necrosis due to otitis media in the early stage. The reason why the end of the incus leg is vulnerable is due to the anatomy of the Ministry hanging over the tympanic cavity and lack of blood supply. In order to correctly understand this phenomenon, should be observed in patients with no history of otitis media histological morphology. The authors looked at an asymptomatic temporal bone specimen and found that the end of the incus long foot varied in shape.