Sorafenib Therapy for Pediatric Acute Myeloid Leukemia with : 2 Case ReportsFMS-like Tyrosine Kinase 3: 2 Case Reports-internal Tandem Duplication Mutations: 2 Case Reports

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Sorafenib is a promising agent for treating pediatric refractory acute myeloid leukemia (AML) exhibiting FMS-like tyrosine kinase 3-internal tandem duplication (FLT3-ITD); however, its optimal use needs to be established. We report 2 cases of refractory pediatric FLT3-ITD-positive AML treated with sorafenib. Case 1 underwent stem cell transplantation (SCT) without entering remission, despite the use of chemotherapy. This patient relapsed despite receiving post-SCT sorafenib. Chemotherapy combined with sorafenib successfully achieved complete remission in case 2. This patient received post-SCT sorafenib and remains in complete remission. The combination of pre-SCT and post-SCT sorafenib may thus be effective for pediatric refractory FLT3-ITD-positive AML.

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