Open法術後に発症した鼓膜浅在化の3症例

抄録

Three cases of lateral healing of the tympanic membrane following canal down tympanoplasty were reported. They received middle ear surgery 20 to 27 years ago two of them underwent canal down tympanoplasty and the rest atticotomy. Following revision surgeries by canaldown technique, the epithelium in the mastoid cavity gradually detached from the bony wall and the tympanic membrane moved laterally. In case 1 and 2, it finally resulted in discontinuity between the tympanic membrane and the ossicular chain. Reoperation succeeded to improve the position of the tympanic membrane and hearing in case 2, but failed in case 1. Reoperation was unnecessary as hearing remained good in case 3.