A Study to Find the Highest Dose of Imetelstat in Combination With Fludarabine and Cytarabine for Patients With AML, MDS or JMML That Has Come Back or Does Not Respond to Therapy

Conditions: Recurrent Acute Myeloid Leukemia; Recurrent Juvenile Myelomonocytic Leukemia; Recurrent Myelodysplastic Syndrome; Refractory Acute Myeloid Leukemia; Refractory Myelodysplastic Syndrome Interventions: Procedure: Biospecimen Collection; Procedure: Bone Marrow Aspiration; Procedure: Bone Marrow Biopsy; Drug: Cytarabine; Procedure: Echocardiography; Drug: Fludarabine; Drug: Hydrocortisone Sodium Succinate; Biological: Imetelstat; Drug: Leucovorin Calcium; Procedure: Lumbar Puncture; Drug: Methotrexate Sponsors: Children ' s Oncology Group Not yet recruiting
Source: ClinicalTrials.gov - Category: Research Source Type: clinical trials