What are the types of brain tumors?
There are primary and secondary brain tumors. Tumors that begin in brain tissue are known as primary tumors. Secondary tumors are when cancer spreads from another site to the brain, which is called metastasis. Brain tumors are classified by the type of tissue in which they begin. The most common brain tumors are gliomas. Astrocytomas arise from small, star-shaped cells called astrocytes. They may grow anywhere in the brain or spinal cord. In adults, astrocytomas most often arise in the cerebrum.
A. There are primary and secondary brain tumors. Tumors that begin in brain tissue are known as primary tumors. Secondary tumors are when cancer spreads from another site to the brain, which is called metastasis. Brain tumors are classified by the type of tissue in which they begin. The most common brain tumors are gliomas. Types of gliomas: § Astrocytomas arise from small, star-shaped cells called astrocytes. They may grow anywhere in the brain or spinal cord. In adults, astrocytomas most often arise in the cerebrum. In children, they occur in the brain stem, the cerebrum and the cerebellum. A grade III astrocytoma is sometimes called anaplastic astrocytoma. A grade IV astrocytoma is usually called glioblastoma multiforme. § Brain stem gliomas occur in the lowest, stem-like part of the brain. The brain stem controls many vital functions. Tumors in this area generally cannot be removed. Most brain stem gliomas are high-grade astrocytomas. § Ependymomas usually develop in the lining of
