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Brain tumors, also known as brain cancer, start within the substance of the brain, spinal cord or nerves. Some tumors which arise from the brain or spine coverings (meninges) are also considered primary brain tumors. Metastatic brain tumors have spread from cancer in other parts of the body, most frequently from the lungs, breast and colon.CausesPrimary brain tumors arise from many types of brain....
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