International Journal of Hematology

, Volume 110, Issue 1, pp 39–49 | Cite as

Single cord blood transplantation in Japan; expanding the possibilities of CBT

  • Hisashi YamamotoEmail author
Progress in Hematology Recent progress in allogeneic stem cell transplantation using alternative stem cell sources


Cord blood (CB) has been an alternative stem cell source for patients with a wide variety of hematological diseases. Cord blood confers the advantages of rapid availability and higher tolerance to two HLA antigen mismatches compared with unrelated donors, and this has increased opportunities for patients who do not have suitable donors or require urgent transplantation. Although the higher rate of engraftment failure remains a serious concern after cord blood transplantation (CBT), the mechanisms underlying this risk have gradually been clarified, which has helped to improve engraftment. Recent studies of CBT and other alternatives have reported comparable outcomes. Moreover, CBT shows promise even when patients are in a non-remission status, which may reflect the potent graft-versus-leukemia effect of CB. Here we compare the most recent outcomes of CBT with those of other stem cell sources and discuss the potential of CB and several outstanding issues that require resolution.


Cord blood transplantation Engraftment failure Early immune reactions Graft-versus-leukemia effect 



The valuable contributions of Naoyuki Uchida (Toranomon Hospital) and Shuichi Taniguchi (Toranomon Hospital) are sincerely appreciated.

Compliance with ethical standards

Conflict of interest

The authors have no conflicts of interest to declare.


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Copyright information

© Japanese Society of Hematology 2019

Authors and Affiliations

  1. 1.Department of HematologyToranomon HospitalTokyoJapan

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