Myeloablative Haploidentical BMT With Post-transplant Cyclophosphamide for Pediatric Patients With Hematologic Malignancies

This is a phase II prospective study designed to evaluate the incidence of 6 month non- relapse mortality, safety, and feasibility of haploidentical bone marrow transplantation (BMT) after myeloablative conditioning with post-transplant Cy. Conditioning regimens include a total body irradiation (TBI)-based prep for lymphoid leukemias and a chemotherapy based prep for myeloid leukemias. To estimate the incidence of non-relapse mortality at 180 days following myeloablative haploidentical BMT for children and young adults with high risk hematologic malignancies.