前庭・蝸牛症状を呈したアブミ骨ならびに代用アブミ骨前庭陥入例の画像所見と治療経験

抄録

We experienced cases of invagination into the vestibule of a Teflon piston following stapes surgery as well as of the stapes itself caused by an earpick-related injury. In all three cases, the pathology was accurately determined by diagnostic imaging centered around high-resolution CT. All patients had severe invagination, and stapedectomy was considered necessary for improvement of their symptoms. Although the vestibular symptoms improved postoperatively, one patient developed hearing loss and relapse of nystagmus two months later. Our examination of the problems involved in the treatment of invagination of the stapes or stapes prosthesis into the vestibule for the acute, subacute, and chronic phases showed that different problems existed during each phase.