A neuroectodermal tumor that involves the central nervous system. The disease is central nervous system primitive neuroectodermal neoplasm (Monarch Disease Ontology entry MONDO_0000640). Also known as: CNS PNET, CNS primitive neuroectodermal neoplasm, CNS primitive neuroectodermal tumor, CNS primitive neuroectodermal tumour, central nervous system PNET, central nervous system neuroectodermal tumor, central nervous system neuroectodermal tumour, central nervous system primitive neuroectodermal tumor.