A mixed germ cell tumor that arises from the central nervous system and occurs during childhood. The disease is childhood central nervous system mixed germ cell tumor (MONDO_0004257). Also known as: Central nervous system Mixed germ cell tumor, Central nervous system Mixed germ cell tumour, childhood mixed germ cell tumor of central nervous system, childhood mixed germ cell tumour of central nervous system, mixed germ cell tumor of central nervous system of childhood, mixed germ cell tumour of central nervous system of childhood, paediatric mixed germ cell tumour of central nervous system, pediatric mixed germ cell tumor of central nervous system.