Title: Central Nervous System Primitive Neuroectodermal Tumor. Author: Ghadi Ahmad Hasan Al-Wazani. Keywords: Oncology, Neurosurgery, Tumor classification, PNETs. Scientific Editor: Dr Omar Jbarah Introduction : The terminology Central Nervous System Primary Neuroectodermal Tumors (PNET) have been removed from the diagnostic dictionary1 and was replaced by new tumor names that reflect the new classification of these tumors. This new classification is based on newly discovered genetic and molecular classification.2 Before the C19MC gene amplification discovery, all tumors that were not Medulloblastoma were classified as CNS Primary Neuroectodermal Tumors (PNET) , or supratentorial PNETs. Nonetheless, they are now classified into different categories […]