CD34 and acute lymphoblastic leukemia: A 9-year-old boy diagnosed with T Cell ALL received HLA-haploidentical donor stem cell transplantation in his second complete remission, from his 40-year-old father with T-cell replete granulocyte colony-stimulating factor (G-CSF) mobilized peripheral blood stem cells (PBSC) as the graft source and a cell dose of 6.3 × 106/kg CD34 + cells.