The fourth ventricle is a tent-shaped cavity located between the brainstem and the cerebellum.

第四脑室是位于脑干和小脑之间的帐篷样腔体结构。

Overall, the most common malignant tumor is a medulloblastoma, which typically forms in or around the cerebellum, adjacent to the fourth ventricle.

总体而言，最常见的儿童恶性脑肿瘤是髓母细胞瘤；它们通常在第四脑室旁的小脑内或周围形成。

The third ventricle makes a bit more cerebrospinal fluid and then sends all of it to the fourth ventricle via the cerebral aqueduct.

第三脑室也产生一些脑脊液，然后把全部的脑脊液通过大脑（脑室系统）导水管排入第四脑室。

Now, again, they can form in the brain and spinal cord because that's where ependymal cells are found, but pediatric ependymomas tend to form in the fourth ventricle.

同样，它们可以在大脑和脊髓中形成，因为这些地方分布着室管膜细胞，但儿童室管膜瘤往往在第四脑室形成。

After the fourth ventricle, the cerebrospinal fluid enters the subarachnoid space, which is the space between the arachnoid and pia mater, two of the inner linings of the meninges which cover and protect both the brain and the spine.

流入第四脑室后，脑脊液进入蛛网膜下腔，即蛛网膜和软脑膜的间隙；蛛网膜和软脑膜位于脑膜内层，同时覆盖、保护大脑和脊髓。