“…In recent years, peripheral blood stem cells have largely replaced bone marrow as a peripheral source of allogeneic stem cells because of their relative ease of collection, quicker engraftment kinetics, and economic advantages. The incidence of chronic GVHD has been reported to be higher after peripheral blood stem cell transplantation (PBSCT) than after bone marrow transplantation, whereas the incidence of acute GVHD after PBSCT is not significantly higher (3)(4)(5)(6)(7). Acute GVHD is a rapidly progressive, unrelenting, systemic illness characterized by immunosuppression, cachexia, and tissue injury of the skin, liver, and intestinal mucosa.…”