Medulloblastoma

NEWLY DIAGNOSED CHILDREN (LESS THAN 10 YEARS OLD) WITH MEDULLOBLASTOMA AND OTHER CENTRAL NERVOUS SYSTEM EMBRYONAL TUMORS: CLINICAL AND MOLECULAR RISK-TAILORED INTENSIVE AND COMPRESSED INDUCTION CHEMOTHERAPY FOLLOWED BY CONSOLIDATION WITH EITHER SINGLE CYCLE (LOW RISK PATIENTS) OR RANDOMIZATION (HIGH RISK PATIENTS) TO either SINGLE-CYCLE or TO THREE TANDEM CYCLES OF MARROW-ABLATIVE CHEMOTHERAPY WITH AUTOLOGOUS HEMATOPOIETIC PROGENITOR CELL RESCUE