There are two types of brain tumors: benign and malignant.
The origin of a primary tumor is in the brain. It can be benign (less likely to grow and/or invade a normal functioning brain) or malignant (likely to grow and/or invade a normal functioning brain). Primary brain or spinal cord tumors rarely spread to other organs.
A metastatic tumor is caused by cancer that has spread to the brain from somewhere else in the body. Brain tumors that have spread to the brain are always cancerous.
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