“…(6) Nasser Institute is the first and largest centre for hematopoietic stem cell transplantation in Egypt with 20 cabins outfitted with High Efficiency Particulate Air (HEPA) filters, positive pressure, and vertical laminar air flow. (7,8) Hematopoietic Stem Cell Transplantation can be classified into three types which are autologous, syngeneic and allogeneic transplant. Autologous transplant; occurs when the child get the stem cells from himself or herself while in syngeneic transplant the child receive the healthy bone marrow from their identical twins and a more difficult transplant known as allogeneic, in which the child receives the stem cells from a healthy donor who is Human Leucocytes Antigen (HLA) compatible with him or her.…”