Allogeneic Bone Marrow Transplantation versus Peripheral Blood Stem Cell Transplantation for Hematologic Malignancies in Children: A Systematic Review and Meta-Analysis

Biol Blood Marrow Transplant. 2020 Jan;26(1):88-93. doi: 10.1016/j.bbmt.2019.07.025. Epub 2019 Aug 5.


Peripheral blood stem cell transplantation (PBSCT) is being increasingly performed as an alternative to bone marrow transplantation (BMT); however, PBSCT has not been proven to have equivalent outcome to BMT. We conducted a meta-analysis to compare survival rates and treatment-related complications between PBSCT and BMT for pediatric hematologic malignancies. We searched Medline, Embase plus Embase classics, and the Cochrane Central Register of Controlled Trials for the terms "hematopoietic stem cell transplantation" AND "allogeneic transplantation" AND "children", including randomized controlled studies and cohort studies without language limitations. We identified 7 of 5368 studies for inclusion in our meta-analysis. The cohorts of these studies included a total of 4328 patients, 3185 who underwent BMT and 1143 who underwent PBSCT. Five-year overall survival was similar in the 2 groups (PBSCT, 56.2%; BMT, 63.5%; relative risk [RR], 1.17; 95% confidence interval [CI], .91 to 1.52), as was the 5-year event-free survival (PBSCT, 49.9%; BMT, 57.2%; RR, 1.14; 95% CI, .93 to 1.39). The incidences of nonrelapse mortality and chronic graft-versus-host disease were higher in the PBSCT group compared with the BMT group (RR, 1.73; 95% CI, 1.50 to 1.99 versus RR, 1.55; 95% CI, 1.18 to 2.03). This meta-analysis found insufficient evidence to conclude that peripheral blood stem cells are equivalent to bone marrow. The results indicate that bone marrow can still be a preferred donor source for pediatric hematologic malignancies.

Keywords: Bone marrow transplantation; Children; Peripheral blood stem cell transplantation.

Publication types

  • Comparative Study
  • Meta-Analysis
  • Systematic Review

MeSH terms

  • Adolescent
  • Allografts
  • Bone Marrow Transplantation*
  • Child
  • Child, Preschool
  • Chronic Disease
  • Disease-Free Survival
  • Female
  • Graft vs Host Disease* / etiology
  • Graft vs Host Disease* / mortality
  • Graft vs Host Disease* / prevention & control
  • Hematologic Neoplasms* / mortality
  • Hematologic Neoplasms* / therapy
  • Humans
  • Male
  • Peripheral Blood Stem Cell Transplantation*
  • Survival Rate