title: High-dose compared with intermediate-dose methotrexate in children with a first relapse of acute lymphoblastic leukemia.
abstract: High-dose methotrexate (MTX) has been extensively used for treatment of acute lymphoblastic leukemia (ALL). To determine the optimal dose of MTX in childhood relapsed ALL, the ALL Relapse Berlin-Frankfurt-Münster (ALL-REZ BFM) Study Group performed this prospective randomized study. A total of 269 children with a first early/late isolated (n = 156) or combined (n = 68) bone marrow or any isolated extramedullary relapse (n = 45) of precursor B-cell (PBC) ALL (excluding very early marrow relapse within 18 months after initial diagnosis) were registered at the ALL-REZ BFM90 trial and randomized to receive methotrexate infusions at either 1 g/m(2) over 36 hours (intermediate dose, ID) or 5 g/m(2) over 24 hours (high dose, HD) during 6 (or 4) intensive polychemotherapy courses. Intensive induction/consolidation therapy was followed by cranial irradiation, and by conventional-dose maintenance therapy. Fifty-five children received stem-cell transplants. At a median follow-up of 14.1 years, the 10-year event-free survival probability was .36 (+/- .04) for the ID group (n = 141), and .38 (+/- .04) for the HD group (n = 128, P = .919). The 2 groups did not differ in terms of prognostic factors and other therapeutic parameters. In conclusion, methotrexate infusions at 5 g/m(2) per 24 hours, compared with 1 g/m(2) per 36 hours, are not associated with increased disease control in relapsed childhood PBC acute lymphoblastic leukemia.
authors: Department of Pediatric Oncology/Hematology, University of Berlin (Charité Universitätsmedizin Berlin), Augustenburgerplatz 1, Berlin, Germany. arend.stackelberg@charite.de
authors: Arend
authors: A
authors: von Stackelberg
authors: Reinhard
authors: R
authors: Hartmann
authors: Christoph
authors: C
authors: Bührer
authors: Rüdiger
authors: R
authors: Fengler
authors: Gritta
authors: G
authors: Janka-Schaub
authors: Alfred
authors: A
authors: Reiter
authors: Georg
authors: G
authors: Mann
authors: Kjeld
authors: K
authors: Schmiegelow
authors: Richard
authors: R
authors: Ratei
authors: Thomas
authors: T
authors: Klingebiel
authors: Jörg
authors: J
authors: Ritter
authors: Günter
authors: G
authors: Henze
mesh_terms: D000293:Adolescent; D000970:Antineoplastic Agents / Q000008:administration & dosage / Q000627:therapeutic use; D000971:Antineoplastic Combined Chemotherapy Protocols / Q000627:therapeutic use; D002648:Child; D002675:Child, Preschool; D004305:Dose-Response Relationship, Drug; D005260:Female; D006801:Humans; D007223:Infant; D053208:Kaplan-Meier Estimate; D008297:Male; D008727:Methotrexate / Q000008:administration & dosage* / Q000627:therapeutic use*; D054198:Precursor Cell Lymphoblastic Leukemia-Lymphoma / Q000188:drug therapy* / Q000517:prevention & control*; D012008:Recurrence
chemical_list: D000970:Antineoplastic Agents; D008727:Methotrexate