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Antimetabolite therapy for lesser-risk B-lineage acute lymphoblastic leukemia of childhood: a report from Children's Oncology Group Study P9201. Blood 2007 Aug 15;110(4):1105-11 PMID: 17442849 PMCID: PMC1939894

Pubmed ID



Pediatric Oncology Group (POG) protocol 9201 enrolled children with lesser-risk B-lineage acute lymphoblastic leukemia (ALL) defined by age (1-9), white blood cell count (WBC) less than 50 x 10(9)/L (50,000/microL), DNA findings of trisomies 4 and 10 (or DNA index > 1.16), and lack of overt central nervous system (CNS) leukemia. After vincristine, prednisone, and asparaginase induction, 650 of 653 eligible patients attained remission (3 induction deaths) and received 6 courses of intravenous methotrexate (1 g/m(2)) with daily mercaptopurine. Weekly intramuscular methotrexate was added during maintenance; pulses of vincristine and prednisone were administered with periodic intrathecal chemotherapy. Treatment duration was 2.5 years. No alkylators, epipodophylotoxins, anthracyclines, or radiation were given. The 6-year event-free survival (EFS) was 86.6% with overall survival (OS) of 97.2%. Patients with less than 5% marrow blasts on induction day 15 had superior EFS. A difference not reaching conventional statistical significance (P = .068) was noted for superior outcomes in patients with trisomies of chromosomes 4 and 10 versus those lacking double trisomies. Sex, ethnicity, CNS status, and WBC were not predictive. This indicates the great majority of children with lesser-risk B-lineage ALL are curable without agents with substantial late effects.

Author List

Chauvenet AR, Martin PL, Devidas M, Linda SB, Bell BA, Kurtzberg J, Pullen J, Pettenati MJ, Carroll AJ, Shuster JJ, Camitta B


Bruce M. Camitta MD Clinical Professor in the Medicine department at Medical College of Wisconsin


2-s2.0-34548014052   40 Citations

MESH terms used to index this publication - Major topics in bold

Antineoplastic Combined Chemotherapy Protocols
Cell Lineage
Central Nervous System Neoplasms
Child, Preschool
Disease-Free Survival
Infusions, Intravenous
Injections, Intramuscular
Injections, Spinal
Pilot Projects
Precursor Cell Lymphoblastic Leukemia-Lymphoma
Remission Induction
Treatment Outcome
jenkins-FCD Prod-353 9ccd8489072cb19f5b9f808bb23ed672c582f41e