ahlam1399
08-28-2019, 11:04 PM
Brain cancer is usually caused by growth of cancer cells in the brain itself or the spread of cancer cells to the brain from other parts of the body. In the former case it is categorized as primary and in the latter as secondary. The tumor may be benign or malignant. If benign, it may not be life threatening. The malignant one is cancerous and is the leading killer among all types of cancer.
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