An incidence study of cholesteatoma requiring surgery

Abstract

The annual incidence of first surgery for cholesteatoma was 3.2 cases per 100,000 inhabitants/year from 2001 to 2020 in a population in Sakae Ward, Yokohama City, Japan. Sakae Ward has an area of 18.55 square kilometers and 122,000 total inhabitants. This study dealt with the number of first-time surgeries for acquired middle ear cholesteatoma. Congenital cholesteatoma, external auditory canal cholesteatoma, cholesterol granuloma and recurrent middle ear cholesteatoma were excluded, and bilateral cholesteatoma counted as a single case. Almost all cholesteatoma patients in Sakae Ward visit our hospital, so we can calculate the accurate incidence of cholesteatoma requiring surgery in this area.