Brain Tumors

About Brain Tumors

The brain is the center of thought, memory, emotion, speech, sensation and motor function. The spinal cord and special nerves in the head called cranial nerves carry and receive messages between the brain and the rest of the body.
 
There are two types of brain tumors: 
Primary, a tumor that starts in the brain. Primary brain tumors can be benign (noncancerous) or malignant. 
Metastatic, a tumor caused by cancer elsewhere in the body that spreads to the brain. Metastatic brain tumors are always cancerous. 
Primary tumors in the brain or spinal cord rarely spread to distant organs. 
Brain tumors cause damage because as they grow they can interfere with surrounding cells that serve vital roles in our everyday life.

General Risk Factors for Brain Tumors

Most brain and spinal cord tumors have no known risk factors and occur for no apparent reason. There are no known proven ways to prevent these tumors.

Facts about Brain Tumors

The Central Brain Tumor Registry of the United States estimates that more than 40,000 Americans will be diagnosed with a primary brain tumor this year. 
This year, an estimated 170,000 Americans will be diagnosed with a brain or spinal cord tumor that has spread from another part of the body.

Signs of Brain Tumors

No blood test or other screening exam can detect brain tumors, but there are often some outward signs. While tumors in different parts of the central nervous system disrupt different functions, some symptoms include:

  • Headaches.  
  • Nausea/vomiting.  
  • Seizures.  
  • Weakness or numbness on one side of the body.  
  • Changes in vision, hearing or sensation.  
  • Difficulty with speech.  
  • Lack of coordination.  
  • A change in mood or personality.  
  • Memory loss.

Diagnosing Brain Tumors

If you suffer from any of the initial signs of a brain tumor, your doctor will likely conduct some or all of the following tests: 
 
A physical exam to determine your overall health. 
A neurologic exam to evaluate brain and spinal cord function. 
Imaging studies, such as CT, MRI or PET scans, to look for signs of a brain tumor. 
If studies or scans indicate you might have a brain tumor, some tissue may be taken from the tumor to make an exact diagnosis. This test is called a biopsy. 
A spinal tap may also be performed to look for tumor cells. During this test, a needle is placed in the lower back to obtain a sample of cerebrospinal fluid. This fluid is then examined to see if tumor cells are present.

Treating Brain Tumors

If doctors determine that you have a tumor, the treatment options and prognosis are based on the following factors:

  • Tumor type. 
  • Location and size of tumor. 
  • Tumor grade (how abnormal the cells are). 
  • Your age, medical history and general health.

Radiation Therapy Options for Brain Tumors

People with brain tumors should discuss treatment options with several cancer specialists, including a radiation oncologist. A radiation oncologist is a doctor who will help you understand the types of radiation therapy available to treat your tumor. Conventional radiation therapy treatment options for brain tumors include:

  • External beam radiation therapy. 
  • Brachytherapy or internal radiation therapy.

Newer Techniques

Doctors are constantly exploring newer and better ways to treat primary brain tumors. 
 
Drugs that make tumor cells more sensitive to radiation are called radiosensitizers. Combining radiation with radiosensitizers may allow doctors to kill more tumor cells. 
Chemotherapy is used with radiation to treat some brain tumors. Your doctor may recommend that you consult with a medical oncologist (chemotherapy doctor) before starting radiation.