![]() Each gets its name from the type of cells involved. Many different types of primary brain tumors exist. In adults, primary brain tumors are much less common than are secondary brain tumors, in which cancer begins elsewhere and spreads to the brain. The result is a mass of abnormal cells, which forms a tumor. The mutations tell the cells to grow and divide rapidly and to continue living when healthy cells would die. A cell's DNA contains the instructions that tell a cell what to do. Primary brain tumors begin when normal cells develop changes (mutations) in their DNA. Primary brain tumors originate in the brain itself or in tissues close to it, such as in the brain-covering membranes (meninges), cranial nerves, pituitary gland or pineal gland. Medulloblastoma is the most common type of cancerous brain tumor in children. Medulloblastoma is a type of brain cancer that starts in the part of the brain called the cerebellum. Make an appointment with your doctor if you have persistent signs and symptoms that concern you. Seizures, especially in someone who doesn't have a history of seizures.Gradual loss of sensation or movement in an arm or a leg.Vision problems, such as blurred vision, double vision or loss of peripheral vision. ![]() Headaches that gradually become more frequent and more severe.New onset or change in pattern of headaches. ![]() General signs and symptoms caused by brain tumors may include: The signs and symptoms of a brain tumor vary greatly and depend on the brain tumor's size, location and rate of growth. ![]()
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