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Objective: To investigate the cumulative recurrence rate of pars tensa retraction cholesteatoma on the new staging system established by Japan Otological Society (JOS). Materials and Methods: It is a retrospective study and performed in a tertiary and academic center. The series comprised 71 patients with pars tensa retraction cholesteatoma who underwent surgical treatment by a single surgeon between 1994 and 2007. Results: The 10-year cumulative recurrence rate of pars tensa retractiondoi:10.4236/ijohns.2014.31001 fatcat:tmgflrbn6zci5igtnk4somqqs4