发生在脑干之上第四脑室室管膜的室管膜瘤。
Here is an ependymoma arising from the ependymal lining of the fourth ventricle above the brainstem and bulging toward the cerebellum.
发生在脑干之上第四脑室室管膜的室管膜瘤。组织学上，室管膜瘤是良性肿瘤。
Here is an ependymoma arising from the ependymal lining of the fourth ventricle above the brainstem and bulging toward the cerebellum. Ependymomas are benign histologically.
目的：观察血管性痴呆（VD）小鼠第四脑室外侧隐窝与外侧孔之间室管膜游离面扫描电镜特征。
Objective: To study the scanning electron microscopic (SEM) characteristics of floor between lateral recess and lateral aperture of the fourth ventricle in the mice with vascular dementia (VD).
目的：探讨妊娠不同时期小鼠第四脑室外侧隐窝室管膜的形态学变化。
Objective: To observe the dynamic morphological changes of the lateral recess of the fourth ventricle of mice during different periods of gestation.
结论：儿童第四脑室肿瘤以髓母细胞瘤最多见，其次为室管膜瘤。
CONCLUSION: Medulloblastoma accounts for the main part of the fourth ventricular tumors in children while the second commonly seen tumor is ependymoma.
结论：儿童第四脑室肿瘤以髓母细胞瘤最多见，其次为室管膜瘤。
CONCLUSION: Medulloblastoma accounts for the main part of the fourth ventricular tumors in children while the second commonly seen tumor is ependymoma.
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