Current and future status of stem cell expansionBecnel, Melody; Shpall, Elizabeth J.Current Opinion in Hematology: November 2018 - Volume 25 - Issue 6 - p 446–451 doi: 10.1097/MOH.0000000000000463 HEMATOPOIETIC STEM CELL TRANSPLANTATION: Edited by Armand Keating Abstract Author InformationAuthors Article MetricsMetrics Purpose of review Herein, we seek to describe the current and future role of ex-vivo expansion of cord blood hematopoietic stem cells. Recent findings As this field is only in its infancy, there have been many challenges identified. Decreased number of stem cells contained in a cord blood unit and early differentiation of stem cells once expanded have been two overarching challenges faced by the field. Many recent techniques have focused on the properties of the microenvironment and targetable cellular pathways as novel approaches to circumvent these challenges. Summary Novel discoveries have led to the development of approaches that will increase hematopoietic stem cell yield and will improve engraftment in patients receiving cord blood hematopoietic stem cell transplantation. As a result, patients receiving cord blood hematopoietic stem cell transplantationcontinue to have improved outcomes. Department of Stem Cell Transplantation and Cellular Therapy, Division of Cancer Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA Correspondence to Elizabeth J. Shpall, MD, Department of Stem Cell Transplantation and Cellular Therapy, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA. Tel: +1 713 745 2161; e-mails: firstname.lastname@example.org; MRBecnel@mdanderson.org Copyright © 2018 Wolters Kluwer Health, Inc. All rights reserved.