2024 Volume 45 Issue 1 Pages 38-44
The Japan Otological Society (JOS) staging system for middle ear cholesteatoma is a classification system that was created to select surgical methods for cholesteatoma and for correlating with postoperative outcomes. However, reports on pediatric acquired cholesteatoma are scarce. Therefore, we investigated the relationship between the degree of progression and postoperative outcomes based on the 2015 JOS staging system for middle ear cholesteatoma in 21 ears from 21 cases of pediatric acquired cholesteatoma that underwent surgical treatment at our hospital.
In the basic classification, no significant correlation was observed between the degree of progression and recurrence rate or postoperative hearing results. On the other hand, all cases in which recurrence was observed in the MC classification, which is one of the subclassifications, were cases of MC2 or higher without mastoid cell pneumatization. The recurrence rate was significantly higher in cases with a high degree of mastoid cell development. In addition, in the S classification, postoperative hearing results were significantly worse in cases with severe damages to stapes. The JOS staging system for middle ear cholesteatoma could better reflect clinical conditions by using not only basic classifications but also subclassifications. It was also considered useful for evaluating postoperative outcomes in pediatric acquired cholesteatoma.
