Oligodendroglioma
May be subdivided into primary brain tumors and the more common, secondary brain tumors. Primary brain tumors (for example astrocytoma, craniopharyngioma, glioma, ependymoma, neuroglioma, oligodendroglioma, glioblastoma multiforme, meningioma, medulloblastoma) arise from the uncontrolled proliferation of cells within the brain. Secondary brain tumors occur from the spread of cancer into the brain from a distant cancerous organ (metastasis).