St. Jude Children's Research Hospital - Recruiting N/A to 21 years. - T-Cell Replete Haploidentical Donor Hematopoietic Stem Cell Plus Natural Killer (NK) Cell Transplantation in Patients With Hematologic Malignancies Relapsed or Refractory Despite Previous Allogeneic Transplant.
Children's Oncology Group - Recruiting 3 Months to 18 years. - A Randomized Phase II Study Comparing Two Different Conditioning Regimens Prior to Allogeneic Hematopoietic Cell Transplantation (HCT) for Children With Juvenile Myelomonocytic Leukemia (JMML).
Columbia University - Recruiting N/A to 22 years. - CD34+ Stem Cell Selection for Patients Receiving a Matched or Partially Matched Family or Unrelated Adult Donor Allogeneic Stem Cell Transplant for Malignant Disease.
University Hospital Freiburg - Recruiting N/A to 215 Months. - Prospective Non-randomized Multi-center Study for Epidemiology and Characterization of Myelodysplastic Syndromes (MDS) and Juvenile Myelomonocytic Leucemia (JMML) in Childhood.