health care  
All about brain tumor primary brain tumors secondary brain tumors types of brain tumors causes of brain tumor risk factors for brain tumors complications of brain tumor symptoms of brain tumors diagnosing brain tumor brain tumor treatment

What're the risk factors for brain tumors?

Age: Although brain tumors can occur at any age, they're most common in people older than 65. Children younger than 8 appear to be at a higher risk for brain tumors than are older children. Tumors in the central nervous system are now the most common cancers in children, but they are still rare. About 1,500 children are diagnosed with brain tumors each year,

although half are benign. Brain tumors in children are more likely to occur in the cerebellum, the midbrain, or the optic nerve.

Environmental or occupational risk factors: The only proven risk factor for brain tumors to date is radiation from ions (such as with radiation treatment.) Some types of brain tumors appear to occur more frequently in people who are exposed to radiation or certain chemicals, such as those who work in oil refining, rubber manufacturing, and chemical and nuclear industries. But a definite link between exposure to chemicals and brain tumors hasn't been proved. Similarly, electromagnetic fields and the use of cell phones have been studied as causes of primary brain tumors, but no definitive medical evidence indicates that either causes brain tumors.

Diseases associated with brain tumors: Neurofibromatosis type 1 (von Recklinghausen's disease) is the most common inherited cause of brain or spinal cord tumors. The disorder may be associated with optic gliomas or other gliomas of the brain or spinal cord as well as with neurofibromas of peripheral nerves. The gene abnormality responsible for this disorder has been cloned and its protein product identified. Neurofibromatosis type II is less common than von Recklinghausen's disease. It is associated with tumors of both acoustic (hearing) nerves and in some people with meningiomas or spinal cord ependymomas. The gene responsible for neurofibromatosis Type II has been cloned and its protein product identified. Those with tuberous sclerosis (another inherited condition) may have noninfiltrating subependymal giant cell astrocytomas in addition to benign tumors of the skin, heart, or kidneys. Von Hippel-Lindau disease is associated with an inherited tendency to develop hemangioblastomas (blood vessel tumors) of the cerebellum or retina as well as renal cell (kidney) carcinomas. The Li-Fraumeni syndrome results in an increased risk of developing breast cancer, soft tissue sarcomas, leukemia, adrenal gland cancers, and gliomas.

More information on brain tumor

What is brain tumor? - Brain tumors are abnormal growths made up of cells whose growth and division are no longer under the control of the body.
What are primary brain tumors? - A primary malignant brain tumor is one that originates in the brain itself. Primary brain tumors are named due to the cell types.
What are secondary brain tumors? - A secondary (metastatic) brain tumor occurs when cancer cells spread to the brain from a primary cancer in another part of the body.
What types of brain tumors are there? - About half of all primary brain tumors are known collectively as gliomas. Some brain tumors are categorized by their location in the brain.
What causes brain tumors? - The majority of brain tumors have abnormalities of genes involved in cell cycle control, causing uncontrolled cell growth.
What're the risk factors for brain tumors? - Risk factors for brain tumors include age, environmental or occupational risk factors, diseases associated with brain tumors.
What're the complications of brain tumors? - Brain tumors may lead to an emergency complication known as hydrocephalus. A brain tumor can cause temporary or permanent brain damage.
What're the symptoms of brain tumors? - Symptoms of brain tumors vary depending on the size and location of tumor. Many symptoms are related to an increase in pressure in or around the brain.
How is brain tumor diagnosed? - Brain tumor is diagnosed through a combination of symptoms and evaluation of neurological functions.
What's the treatment for brain tumors? - The approach for treating brain tumors is to reduce the tumor as much as possible using surgery, radiation treatment, chemotherapy, or investigative procedures.
Cancers and tumors Mainpage

Topics about cancer

Bone tumors
Bone cancer
Anal cancer
Colorectal cancer (bowel cancer)
Colon cancer
Esophageal cancer
Pancreatic cancer
Stomach cancer
Thyroid cancer
Brain tumor
Brain cancer
Spinal cord tumors
Lung cancer
Breast cancer

All information is intended for reference only. Please consult your physician for accurate medical advices and treatment. Copyright 2005,, all rights reserved. Last update: July 18, 2005