Efficacy and Feasibility of Sorafenib as a Maintenance Agent After Allogeneic Hematopoietic Stem Cell Transplantation for Fms-like Tyrosine Kinase 3 Mutated Acute Myeloid Leukemia: An Update

BackgroundPatients diagnosed with acute myeloid leukemia (AML) with Fms-like tyrosine kinase 3 (FLT3) mutations have a very poor prognosis, despite use of allogeneic hematopoietic stem cell transplantation (allo-HSCT) and salvage treatments.Patients and MethodsWe previously reported the safety and efficacy of sorafenib, an FLT3 inhibitor, as a maintenance agent after allo-HSCT in patients diagnosed with AML with FLT3 mutations. We provide an update on the 27 patients with FLT3-mutated AML in our original report, who received sorafenib as a single maintenance agent.ResultsSince our previous report, others have confirmed our reported significant overall survival and progression-free survival in patients who received sorafenib before and/or after allo-HSCT. In this update on the 27 patients with FLT3-mutated AML in our original report, we show persistence of the previously reported impressive long-term disease control.ConclusionOur results, with longer follow-up than in our previous report, together with those of others, further support the use of sorafenib as a maintenance agent after allo-HSCT.