Within the brain there are several ventricles, or cavities, that are filled with a clear liquid called cerebrospinal fluid. The cerebrospinal fluid, which also surrounds the brain and spinal cord, helps support and cushion the brain. Tumors in the ventricles are known as intraventricular tumors, and...

Glioblastoma multiforme (GBM) is the most malignant form of high-grade astrocytoma. GBMs are the most common adult primary brain tumors, and make up approximately half of all astrocytomas. They can occur at any age, but are more common in older patients. Symptoms Initial symptoms, such as headache...

Anaplastic astrocytomas are one of two primary forms of high-grade (malignant) astrocytomas, both of which are more common than low-grade astrocytomas. Anaplastic astrocytomas comprise approximately 30 percent of all astrocytomas. High-grade astrocytomas can occur at any age, but they are more...