What are CNS tumors?

Gliomas (very limited and some are benign (curable by resection/ localized tx), others infiltrating and progress w/years w/recurrence, others are aggressive, rapid growth fatal malignancy (glioblastoma), in children blastomas (neuroectodermal) seen in CNS, also grouped in PNET neuroblastoma (hemispherical) or medulloblastoma (cerebella)) Astrocytoma (low grade Astrocytoma presenting as an enlarged area of white matter in the left cerebral hemisphere) Glioblastoma (Infiltrating, hemorrhagic and necrotic tumor mass. Tumor is densely cellular with tumor cells ,arranging in palisades around areas of necrosis)