<prompt> Which is not a neuronal tumourEpendymomaNeuroblastomaGangliocytomaGanglioglioma  <response>: The four major classes of brain tumors are: 1. Gliomas Astrocytoma Pleomorphic xanthoastrocytoma Brainstem glioma Pilocytic astrocytoma Fibrillary diffuse astrocytomas Glioblastoma Oligodendroglioma Ependymoma 2. Neuronal tumors Ganglion cell tumors Gangliocytoma Ganglioglioma Dysembryoplastic neuroepithelial tumor Cerebral neuroblastomas 3. Poorly differentiated neoplasm 4. Meningiomas 