中耳真珠腫の対側耳の観察

抄録

To clarify whether or not a common pathogenic factor exists between the affected and contralateral ear in patients with cholesteatoma, we performed the measurement mastoid pneumatization and a inflation-deflation test in 92 contralateral ears.
About 70% of the contralateral ears showed abnormal findings of the ear drum. The majority of the contralateral ears showed poor pneumatization. Therefore, we considered these cases to reflect impaired tubal function in childhood. The conditions of the contralateral ears were similar to those of the affected ears, suggesting a common pathogenic factor in this disorder.