Sorafenib In Relapse of FMS-like Tyrosine Kinase 3 (FLT3)-Internal Tandem Duplication (ITD) AML Trial

The preliminary data of the investigators demonstrate potent activity of Sorafenib combined with Donor lymphocyte infusions (DLI) in relapse of FLT3-ITD+ Acute myeloid leukemia (AML) after allogeneic hematopoietic cell transplantation (allo-HSCT). The investigators therefore launched an observational multicenter trial. The outcomes are assessed in 4 pre-defined groups of individuals according to the therapeutic intervention (chemotherapy-alone-group, chemotherapy/DLI group, sorafenib alone group and sorafenib/DLI group). The specific interventions to the subjects of the study are assigned by the individual transplant center. The investigators will determine the outcome of each group by monitoring the survival and the response rates (complete remission, disease burden reduction, no response) of patients with FLT3-ITD AML relapse after allo-HSCT.