A central nervous system embryonal tumor, not otherwise specified that occurs in childhood. The disease is childhood central nervous system primitive neuroectodermal neoplasm (MONDO_0002798). Also known as: Central nervous system embryonal tumor, NOS, central nervous system primitive neuroectodermal neoplasm of childhood, childhood CNS PNET, childhood CNS primitive neuroectodermal neoplasm, childhood CNS primitive neuroectodermal tumor, childhood CNS primitive neuroectodermal tumour, childhood central nervous system PNET, childhood central nervous system primitive neuroectodermal tumor.