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1·The fourth ventricle was enlarged.

第四脑室扩大。

2·The tumors in fourth ventricle there were speciality of age.

四脑室区常见肿瘤具有年龄特征；

3·Objective To investigate the microsurgical treatment of the fourth ventricle tumors.

目的探讨第四脑室肿瘤的显微手术入路选择。

4·Purpose: To discuss the CT and MRI diagnostic value of tumor of the fourth ventricle.

前言： 目的：探讨四脑室区肿瘤的CT和MRI诊断价值。

5·In the fourth ventricle, differentiation by imaging characteristics is not as reliable.

位于四脑室内，通过影像特征来鉴别是不可靠的。

6·Objective To study operative approach of microsurgery for neoplasm of the fourth ventricle.

目的探讨第四脑室肿瘤显微手术的入路。

7·Objective To explore the MRI features and differential diagnosis of the fourth ventricle tumor.

目的探讨第四脑室肿瘤的MRI表现及鉴别诊断。

8·Objective To analyze surgical method and its therapeutic effect on tumor in the fourth ventricle.

目的分析总结第四脑室肿瘤的手术方法与治疗效果。

9·Results: 8 cases located in cerebellar hemisphere, 5 cases in vermis, 10 cases in fourth ventricle.

结果：肿瘤位于小脑半球8例，小脑蚓部5例，第四脑室10例。

10·Conclusions: Head MRI scans could improve diagnosis and microsurgery effect of the fourth ventricle tumors.

结论：头颅MRI检查可提高第四脑室肿瘤的诊断水平和显微手术质量。