cholesteatoma例句

Objective : To investigate the reasons of the second cholesteatoma of postoperative tympanoplasty.
目的: 探讨单纯鼓室成形术后发生胆脂瘤的原因并提出预防措施.

Objective To study the cause and treatment of external acoustic meatus cholesteatoma.
目的探讨外耳道胆脂瘤的病因和治疗方法.

Objective : To explore the clinic characteristic petrous bone cholesteatoma.
目的: 探讨岩部胆脂瘤的临床特征及手术方法.