Abstract
This randomized phase III trial is studying two different combination chemotherapy regimens to compare how well they work in treating young patients with newly diagnosed supratentorial primitive neuroectodermal tumors or high-risk medulloblastoma when given before additional intense chemotherapy followed by peripheral blood stem cell rescue. It is not yet known which combination chemotherapy regimen is more effective when given before a peripheral stem cell transplant in treating supratentorial primitive neuroectodermal tumors or medulloblastoma.
