High-dose Chemotherapy With Autologous Stem Cell Rescue in Pediatric High-risk Brain Tumors

Reduced-dose Craniospinal Radiotherapy Followed by High-dose Chemotherapy and Autologous Stem Cell Rescue in Children with Newly Diagnosed High-risk Brain Tumor; High-dose Chemotherapy and Autologous Stem Cell Rescue in Infants and Young Children with Newly Diagnosed High-risk Brain Tumor To Avoid or Reduce Craniospinal Radiation; High-dose Chemotherapy and Autologous Stem Cell Rescue in Children with Recurrent Brain Tumor or Non-germinomatous Germ Cell Tumor with Inadequate Response to Conventional Treatment