This randomized clinical trial studies different chemotherapies in treating patients with myelodysplastic syndrome before donor stem cell transplant. Giving chemotherapy before a donor stem cell transplant helps stop the growth of cancer cells in the bone marrow, including normal blood-forming cells (stem cells) and cancer cells, and may prevent the myelodysplastic syndrome from coming back after the transplant. When the healthy stem cells from a donor are infused into the patient they may help the patient's bone marrow make stem cells, red blood cells, white blood cells, and platelets.
- chronic myelomonocytic leukaemia (CMML)
- myelodysplastic syndromes (MDS)