Finally, another common infratentorial tumor is an ependymoma.

最后，另一种常见的脑幕下肿瘤是室管膜。

So let's start with tumor types that are generally infratentorial tumors, because they make up the majority of pediatric brain tumors.

我们从通常属于脑幕下肿瘤的类型开始介绍，因为它们是儿童脑肿瘤的主要类型。

Brain tumors can be categorized by their primary site location as either supratentorial, or infratentorial tumors – though some tumors can form in either.

脑肿瘤可以根据它们的原发部位分类为脑幕上或脑幕下肿瘤，某些肿瘤可以同时位于脑幕上和脑幕下。

Because astrocytes are found through the brain and spinal cord, astrocytomas can form throughout those locations, but juvenile pilocytic astrocytomas are mostly infratentorial tumors in the cerebellum or near the brainstem.

因为星形细胞遍布大脑和脊髓，星形细胞瘤也可以遍布在这些部位，但青少年毛细胞星形细胞瘤大多数是位于小脑内或脑干旁的脑幕下肿瘤。