MT1999-20 Hematopoietic cell transplantation in children with juvenile myelomonocytic leukemia
To determine the probability of long-term disease-free survival in patients with JMML treated with busulfan (BU), cyclophosphamide (CY) and melphalan (L-PAM) followed by hematopoietic cell transplantation.
• Patients must have a diagnosis of JMML and fulfill these minimal criteria (International diagnostic criteria for JMML):
• Leukocytosis (> 13,000) with absolute monocytosis (> 1,000)
• The presence of immature myeloid cells in the peripheral blood
• Less than 30% marrow blasts
• Absence of t(9:22) or BCR-ABL transcript
• Adequate major organ function including:
• Cardiac: ejection fraction > 45%
• Hepatic: no clinical evidence of hepatic failure (e.g. coagulopathy, ascites)
• Karnofsky performance status > 70% or Lansky score > 50%
• Creatinine must be < 2 x normal for age
• Written informed consent.
• Active uncontrolled infection within one week of HCT.
Biological: Stem Cell Transplant, Drug: Preparative Regimen
Juvenile Myelomonocytic Leukemia
Stem cell transplant, long term survival, retinoic acid