Tags: Health Topics | Cancer | brain | tumor | types

5 Types of Brain Tumors

By    |   Wednesday, 22 Jun 2016 05:05 PM

There are two groups of brain tumors, primary and secondary. Primary brain tumors originate in brain tissue, and secondary brain tumors originate in other organs, then spread to the brain.

Secondary brain tumors are more common than primary brain tumors, says WebMD. Brain tumors that contain cancer cells are malignant, and brain tumors without cancer cells are benign. However, benign tumors can be life-threatening depending on the location of the tumor.

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There are four grades of brain tumors based on how normal or abnormal the cells appear:

• Grade 1 brain tumor cells appear normal, are slower in growth, and survival rates are higher.
• Grade 2 brain tumor cells appear slightly abnormal, grow at a slower rate, and have the potential to spread to surrounding tissue. These tumors can recur and elevate to a life-threatening level.
• Grade 3 brain tumor cells appear abnormal with active cell growth. Recurrence is highly possible.
• Grade 4 brain tumor cells are highly abnormal and tend to grow and spread rapidly.

The following five primary brain tumors, according to the American Cancer Society, originate and grow in the brain tissue or spinal cord. These tumors are often malignant or life-threatening and need to be removed or destroyed to prevent death.

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1. Astrocytomas are tumors that originate in the astrocyte glial cells and usually attack the cerebrum. Astrocytomas account for about two out of 10 primary brain tumors and tend to spread over large surfaces, mixing with normal brain tissue. Astrocytomas are graded based on cell appearance and growth.

2. Meningiomas originate in the outer layers of brain tissue called the meninges and are the most common adult primary brain tumors. Women are twice as likely to develop meningiomas and risk increases with age for men and women. Meningiomas are assigned a grade based on the appearance of the cells.

3. Medulloblastomas develop from cells in the cerebellum and are more common in children. These brain tumors grow quickly and are likely to spread throughout the cerebral spinal fluid pathways. Treatment often includes surgery, radiation therapy, and chemotherapy.

4. Gangliogliomas are very rare in adults and have good prognosis with surgery or radiation therapy or a combination of both.

5. Shwannomas (neurilemmomas) account for 8 percent of central nervous system tumors and develop from cranial nerves. They are normally benign brain tumors but can cause hearing, balance, bladder, and bowel issues, as well as weakness and sensory loss.

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There are two groups of brain tumors, primary and secondary. Primary brain tumors originate in brain tissue, and secondary brain tumors originate in other organs, then spread to the brain.
brain, tumor, types
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2016-05-22
Wednesday, 22 Jun 2016 05:05 PM
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