[Allogeneic hematopoietic stem cell transplantation from HLA one-locus-mismatched related donors]

Fourteen patients who received allogeneic hematopoietic stem cell transplantation (HSCT) from a serologically HLA one mismatched related donor (MMRD) between November 1987 and July 2003, were compared with HSCT from matched sibling donor (MSD) (n=142) or matched unrelated donor (MUD) (n=78). Cumulative incidence of acute graft-versus-host disease (GVHD) in patients with MMRD was significantly higher than in those with MSD, but was not different from that in those with MUD. There was no difference in the incidence of extensive type chronic GVHD in HSCT according to donor type. Overall survival (OS) at 5-years in patients with MMRD, MSD and MUD was 42.8%, 55.6% and 44.3%, respectively. The presence of acute GVHD and disease status at HSCT were identified as risk factors for overall survival by multivariate analysis. Acute GVHD was a risk factor for prognosis in patients with MSD and MUD, but not in those with MMRD. It was confirmed that the therapeutic results could be obtained in HSCT from MMRD as well as MUD.