what is brain tumor?
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Explanation:
A cancerous or noncancerous mass or growth of abnormal cells in the brain.
Tumors can start in the brain, or cancer elsewhere in the body can spread to the brain
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A brain tumor is a collection, or mass, of abnormal cells in your brain. Your skull, which encloses your brain, is very rigid. Any growth inside such a restricted space can cause problems. Brain tumors can be cancerous (malignant) or noncancerous (benign).A primary brain tumor originates in your brain.
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