1、Objective To improve clinically recognition of the eardrum - mastoid process operation.
目的提高臨床對中耳乳突手術(shù)的認識。

2、Inflammation of the mastoid process and mastoid cells.
乳突炎，乳突小房炎

3、Objective: to observe the sizes of mastoid process and enrich the data of Chinese investigation.
目的：觀察乳突大小的性別差異，豐富國人體質(zhì)調(diào)查資料。