Patient Data
Patient records were examined for relevant demographic and clinical data. Demographic and socioeconomic characteristics that were extracted included age, sex, family income, city of origin, distance from INCA, maternal age, home type, maternal education level, and household services (ie: water, sewage, electricity). Disease and treatment information included initial symptoms, first radiological exam, surgery location (INCA or other hospital), ventricular peritoneal shunt placement, histology report of the tumor and cerebrospinal fluid, risk stratification, surgical outcome, residual tumor volume, Chang modified staging criteria (M0: non metastatic; M+: seeding to the spinal subarachnoid space, to supratentorial compartment or out of the cerebrospinal axis), craniospinal radiation-therapy dose (23,4 or 36Gy) and chemotherapy regimen (Pre Irradiation Regimen, COG 9961, or Head Start 2 modified/ICE).