And while astrocytomas can be graded I through IV, juvenile pilocytic astrocytomas are only grade I because they are generally benign and slow-growing.

尽管可分为I到IV级，青少年毛只有I级，是因为它们通常为良性且生长缓慢。

Then, two weeks later, after surgery, the pathology reports came back and I was diagnosed with an anaplastic astrocytoma.

然后，在手术两周后，病理告出来了，我被诊断为间变性恶性。

They are typically named by the cell type involved, so for example an astrocytoma is a tumor formed by mutated astrocytes.

脑肿通常以变异的类命名，比如，是由变异的胶质成。

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.

因为遍布大脑和脊髓，也可以遍布在这些部位，但青少年毛大多数是位于小脑内或脑干旁的脑幕下肿。

Individuals are also at an increased risk of developing a subependymal giant cell astrocytoma, or SEGA, which is a type of cancer that can arise from the subependymal nodules.

个体发生室管膜下巨（SEGA）的风险也会增加；SEGA是一种可由室管膜下结节引起的癌症。

Now, while medulloblastoma may be the most common malignant tumor, the most common primary pediatric tumor is a type of astrocytoma called a juvenile pilocytic astrocytoma.

尽管髓母可能是最常见的恶性肿，最常见的儿童原发脑肿是一种，称为青少年毛。