Practicality analysis of the staging system proposed by the Japan Otological Society for acquired middle ear cholesteatoma: A multicenter study of 446 surgical cases in Japan

The 2010 JOS staging system is suitable for evaluating initial pathology. It is particularly practical for standardizing reporting of retraction pocket cholesteatoma and for adjusting for the severity of the condition during outcome evaluations. It may also provide information that is useful for counseling patients.