Over nine years, 33 children with neonatal neuroblastoma were registered with the UKCCSG (United Kingdom Children's Cancer Study Group). Tumours of all stages were found, but stage 4S disease predominated. Five tumours were detected prenatally by ultrasonography. Treatment varied according to tumour stage. The overall survival of the group was 91%. Ten children have had long term complications as a result of their disease, usually as a result of spinal tumour involvement. The good overall prognosis in this age group is encouraging, but the poor neurological outcome of patients with intraspinal extension is of concern. (Arch Dis Child Fetal Neonatal Ed 1999;81:F134-F137)