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  • Title: FLT3 mutations in normal karyotype acute myeloid leukemia in first complete remission treated with autologous peripheral blood stem cell transplantation.
    Author: Yoshimoto G, Nagafuji K, Miyamoto T, Kinukawa N, Takase K, Eto T, Kato K, Hayashi S, Kamimura T, Ohno Y, Taniguchi S, Harada M.
    Journal: Bone Marrow Transplant; 2005 Dec; 36(11):977-83. PubMed ID: 16184177.
    Abstract:
    We retrospectively analysed the significance of FLT3 mutations in patients with acute myeloid leukemia (AML) having a normal karyotype, who were treated with high-dose chemotherapy and autologous peripheral blood stem cell transplantation (auto-PBSCT). In all, 34 patients with normal karyotype AML in first complete remission receiving high-dose chemotherapy and auto-PBSCT were analysed based on the presence or absence of FLT3/ITDs and FLT3/D835. They were 16 males and 18 females and with a median age of 41.5 years. FLT3/ITDs were detected in eight of 34 patients (23.5 %), and FLT3 D835 mutations in two of 34 patients (5.9%). White blood cell count (P=0.0087), serum concentration of lactate dehydrogenase (P=0.005), and percentages of peripheral blood (P=0.0131) and bone marrow (BM) blasts (P=0.0312) were significantly higher in patients showing the FLT3 mutations. Overall survival (OS) and disease-free survival (DFS) were similar between patients with or without FLT3 mutations (5 year DFS, 67.5 vs 68.55%, P=0.819; 5 year OS, 64.81 vs 78.88%, P=0.4457, by the log-rank test). FLT3 mutations demonstrate no further prognostic impact in patients with normal karyotype AML in first CR treated with high-dose chemotherapy and auto-PBSCT. Myeloablative chemotherapy supported by auto-PBSCT may overcome any poor prognostic implications of FLT3 mutations.
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