摘要Objective To evaluated the efficiency of low-dose cytosine arabinoside plus aclarubicin with concurrent administration of granulocyte colony-stimulating factor(CAG)regimen for refractory biphenotypic acute leukemia(BAL).Methods We treated 5 refractory BAL patients by CAG regimen(10 mg·m 2 cytosine arabinoside subcutaneously administrated every 12 hours,day 1-14;5-7 mg·m2 aclarubicin intravenously administrated daily,day 1-8;and concurrently used 200 μg.m-2·d-1 granulocyte colony-stimulating factor subcutaneously)from November 2002 to April 2007.The efficacy of the regimen was evaluated by response rate,and the side effects were also measured.Results The complete remission rate was 80% ,median duration of absolute neutrophil count＜5.0×108/L and platelet count＜2.0×1010/L was day 13 and day 1,respectively;and the infection rate was low(Ⅲ-Ⅳ infection rate,20.00% ).Conclusion CAG regimen as remission induction chemotherapy for BAL patients is effective with a high remission rate and low toxicity.