Objective:To evaluate the antileukemic activity and side effects of topotecan-based induction therapy in patients with refractory and relapsed acute myelogenous leukemia(AML).

• 目的 :评价以拓扑替康为基础的联合诱导方案治疗难治及复发急性粒细胞白血病 (AML)的疗效及不良反应。