Patients with significant neurologic symptoms (e.g., seizures, cranial nerve palsy, paresis, mental status changes) are entered directly on the Induction regimen and do not receive the Therapeutic Window. The following acronyms are used: ARA-C Cytarabine, NSC-63878 ASP Asparaginase, NSC-109229 (E. coli) or 106977 (Erwinia) CF Leucovorin calcium, NSC-3590 CTX Cyclophosphamide, NSC-26271 DM Dexamethasone, NSC-34521 DNR Daunorubicin, NSC-82151 DTC101 Sustained release cytarabine G-CSF Granulocyte Colony-Stimulating Factor (Amgen), NSC-614629 HC Hydrocortisone, NSC-10483 Mesna Mercaptoethane sulfonate, NSC-113891 MP Mercaptopurine, NSC-755 MTX Methotrexate, NSC-740 TIT Triple Intrathecal Therapy, IT MTX/IT HC/IT ARA-C TMP-SMX Trimethoprim-sulfamethoxazole TSPA Thiotepa, NSC-6396 VCR Vincristine, NSC-67574 VP-16 Etoposide, NSC-141540