Observation of effect of treatment of cholesteatoma of posterior part of mesotympanum with operative approach from external auditory canal 外耳道进路处理中鼓室后部胆脂瘤的疗效观察
Objective To treat cholesteatoma of posterior part of mesotympanum and one stage tympanoplasty. 目的观察中鼓室后部胆脂瘤并一期鼓室成形术的疗效。