1. Objective To study microsurgical treatment of fourth ventricle tumors.

2. Objective To investigate the microsurgical treatment of the fourth ventricle tumors.

3. Methods 220 traumatic patients with fourth ventricle straitness and transtentorial hernia in clinic were retrospectively analysed.

4. There is edema and partial effacement of the fourth ventricle, dorsal pons , and mid brain on the left.

5. Syncope occurs in severe brain MRI: the fourth ventricle, basal cistern to expand, suggesting that the brain stem, cerebellar vermis atrophy.

6. Methods: To analyze 66 cases of fourth ventricle tumor patient being treatment with microsurgery method.

7. This horizontal ( CT scan ) section of the brain reveals a large ependymoma of the fourth ventricle.

8. Less commonly, the nodules may be and temporal horns, the third ventricle, or the fourth ventricle.

9. Objective To explore the advantage of cerebello-medullary to resect the neoplasm in the fourth ventricle region and to discuss the microsurgical skills.

10. Rusults All 8 cases of mutism syndrome possessed a giant tumor in the cerebellar vermis, of 6 tumors invaded the fourth ventricle. All were complicated by other neurological deficits.

11. Purpose To evaluate and study CT and MRI diagnostic value of fourth ventricle tumors.

12. In childhood medulloblastoma patients, the evidence of high expression of bcl-XL and primary infiltration of the floor of the fourth ventricle might serve as important prognostic factors.

13. The nucleus fastigii was situated to the middle line at the anterior end of the superior vermis, and over the roof of the fourth ventricle.

14. Including cerebellar hemisphere tumor, cauda cerebelli bridge cerebellum angle, fourth ventricle, auditory nerve lump,[Sentence dictionary] pitch tumor and so on.

15. Objective To refine the transcerebellomedullary fissure approach to the fourth ventricle and dissect the fissure to obtain sufficient operative view without splitting the inferior vermis.

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