経乳突的手術を行った錐体部真珠腫4症例の長期経過

抄録

Petrous bone cholesteatoma is a relatively rare case (approx.1-4% of all cholesteatoma) and can be a difficult surgical challenge because of its anatomical characteristics. Between 1978 and 1996, four petrous bone cholesteatoma were operated at Hamamatsu University School of Medicine Hospital. All cases were operated by the transmastoid approach and cavity exteriorization. During the long-term follow up, all cases have no cavity problems. In this report, we speculated that widely exteriorization and low facial ridge are the factors contributing to the state of the cavity.