brain, spinal cord, and nerve disorders
Overview of Brain Tumors
Primary tumors
The most common primary tumors include Gliomas (including astrocytomas, oligodendrogliomas, and glioblastomas) and ependymomas Medulloblastomas None Meningiomas None Vestibular Schwannoma None Lymphoma that originates in the central nervous system ( Primary Brain Lymphoma ) Gliomas account for 65% of all primary brain tumors. Tumors that spread (metastasize) to the brain from elsewhere in the body are much more common than tumors that start in the brain. Noncancerous tumors are named for the specific cells or tissues in which they originate. For example, hemangioblastomas originate in blood vessels (“hema” refers to blood vessels, and hemangioblasts are the cells that develop into blood vessel tissue). Some noncancerous tumors originate in cells of the embryo (embryonic cells), early in the development of the fetus. Such tumors may be present at birth. 