Primary tumors: Originate in the brain either in the brain parenchyma (eg, gliomas, medulloblastomas, ependymomas) or in extraneural structures (eg, meningiomas, acoustic neuromas, other schwannomas)
Secondary brain tumors (brain metastases): Originate in tissues outside the brain and spread to the brain
Brain metastases are about 10 times more common than primary tumors.
Primary tumors: Originate in the brain either in the brain parenchyma (eg, gliomas, medulloblastomas, ependymomas) or in extraneural structures (eg, meningiomas, acoustic neuromas, other schwannomas)Secondary brain tumors (brain metastases): Originate in tissues outside the brain and spread to the brainBrain metastases are about 10 times more common than primary tumors.
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