The brain is an important organ that controls thought, memory, emotion, touch, motor skills, vision, respiration, temperature, hunger, and every process that regulates your body.

Doctors do not know exactly what causes a brain tumor, although certain factors appear to raise your risk: exposure to radiation or pesticides, an impaired immune system, and a family history of brain tumors.

A brain tumor is an abnormal growth of tissue in the brain. The tumor can either originate in the brain itself or come from another part of the body and travel to the brain.

A glioma is a type of brain tumor that originates from glial cells, which help support the function of the other main brain cell type—the neuron.

A meningioma is a type of tumor that's often discussed along with brain tumors, though it's not technically a brain tumor. This type of tumor grows in the meninges, which are layers of tissue that cover the brain and spinal cord.

Sometimes brain tumors start in the lung, breast, skin, kidney, or other body parts and spread to the brain. These are called secondary or metastatic brain tumors.

It’s OK to feel overwhelmed and afraid. But you shouldn’t let those feelings stop you from finding out as much as you can about your cancer and about the options you have.

Before your doctor can recommend a treatment plan, he or she needs to know the grade of the cancer. The grade tells your doctor how malignant the tumor is and how it might respond to treatment.

Chemotherapy uses anticancer drugs to kill cancer cells. The drugs attack and kill cells that divide rapidly. Some of these rapidly dividing cells are cancer, but others are normal cells in the body.

Doctors give radiation therapy in one of these two ways: from a machine outside the body or from small radioactive pellets placed inside the area with cancer.

Your treatment may cause side effects such as anemia, loss of appetite, and hair loss. Here are ideas on how to ease these and other discomforts.

A tumor forms when an abnormal cell proliferates to form a mass of abnormal cells. Spinal cord tumors are tumors that form on the spinal cord or in the area around it