Azacitidine and Quizartinib for the Treatment of Myelodysplastic Syndrome or Myelodysplastic/Myeloproliferative Neoplasm With FLT3 or CBL Mutations

This phase I/II trial studies the side effects and best dose of quizartinib when given with azacitidine and to see how well they work in treating patients with myelodysplastic syndrome or myelodysplastic/myeloproliferative neoplasm with FLT3 or CBL mutations. Chemotherapy drugs, such as azacitidine, work in different ways to stop the growth of cancer cells, either by killing the cells, by stopping them from dividing, or by stopping them from spreading. Quizartinib may stop the growth of cancer cells by blocking some of the enzymes needed for cell growth. Giving azacitidine and quizartinib may help to control myelodysplastic syndrome or myelodysplastic/myeloproliferative neoplasm.