1、The fourth ventricle was enlarged.
第四腦室擴大。

2、The tumors in fourth ventricle there were speciality of age.
四腦室區(qū)常見腫瘤具有年齡特征；

3、Objective To explore the MRI features and differential diagnosis of the fourth ventricle tumor.
目的探討第四腦室腫瘤的MRI表現(xiàn)及鑒別診斷。

4、Objective To investigate the microsurgical treatment of the fourth ventricle tumors.
目的探討第四腦室腫瘤的顯微手術(shù)入路選擇。