This tumor arises from the ependymal cells lining the cerebrospinal fluid sacs ventricles of the brain. They do this by transmitting chemical and electrical signals through their nerve fibers axons. Under the microscope, the tumor has the features of an anaplastic astrocytoma with the addition of areas of dead tissue necrosis. Information about using the images in this summary, along with many other images related to cancer can be found in Visuals Online. Surgical or open biopsy craniotomy If imaging tests show the tumor can likely be treated with surgery, the neurosurgeon may not do a needle biopsy. If you are getting chemotherapyblood tests will be done routinely to check blood counts and to see if the treatment is affecting other parts of your body. In older people, a meningioma may cause dementia.
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A biopsy may be done to diagnose certain types of brain stem glioma.
Brain Tumors in Children
Their bodies and brains are still developing. A pathologist views the tissue under a microscope to look for cancer cells. Most brain and spinal cord tumors develop from glial cells. If the patient is awake, the neurosurgeon injects a local anesthetic into areas of skin above the skull to numb them. Magnetic resonance imaging MRI scan MRI scans are very good for looking at the brain and spinal cord and are considered the best way to look for tumors in these areas.