Abstract
A second allogeneic (allo) hematopoietic cell transplant (HCT) is an important therapeutic consideration for patients relapsing after their first. We conducted a retrospective review of 41 pediatric patients with leukemia that underwent a second allo-HCT at our institution. Overall, 53.7 and 43.9 % of patients were alive and disease-free at 1 and 5 years, respectively, after the second allo-HCT. The factors affecting outcome by both univariate and multivariate analysis were interval between transplants and the use of a myeloablative conditioning (MAC) regimen prior to second transplant. Outcomes were inferior in patients who received their second transplant <6 months from their first HCT when compared to patients in whom the interval between HCTs was 6–12 or more than 12 months. Interval between HCTs was also significant when each type of leukemia (acute lymphoblastic leukemia (ALL) n = 21, acute myelogenous leukemia (AML) n = 11, and chronic myelogenous leukemia (CML) n = 7) was analyzed separately. In univariate analysis, use of the same donor and use of a matched sibling donor resulted in significant improved outcome. There was not a significant association between disease-free survival (DFS) and age, remission status, use of total body irradiation (TBI) before second HCT, or type of leukemia. Second allogeneic HCT can be a curative therapeutic option for leukemia patients relapsing after their first transplant. As more targeted therapies have become available, patients that relapse after first HCT are more likely to achieve remission. Therefore, it is anticipated that there will be more candidates for second HCT with improved performance and remission status, ultimately leading to a better outcome with the second HCT.
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Abbreviations
- ALL:
-
Acute lymphoblastic leukemia
- Allo:
-
Allogeneic
- AML:
-
Acute myelogenous leukemia
- BM:
-
Bone marrow
- BU:
-
Busulfan
- CI:
-
Confidence interval
- CML:
-
Chronic myelogenous leukemia
- CR:
-
Complete remission
- CY:
-
Cyclophosphamide
- DFS:
-
Disease-free survival
- DLI:
-
Donor lymphocyte infusions
- GvHD:
-
Graft-versus-host disease
- HCT:
-
Hematopoietic cell transplant
- HR:
-
Hazard ratio
- JMML:
-
Juvenile myelomonocytic leukemia
- MAC:
-
Myeloablative conditioning
- MSD:
-
Matched sibling donor
- NRM:
-
Non-relapse mortality
- PBSC:
-
Peripheral blood stem cells
- RIC:
-
Reduced intensity conditioning
- TBI:
-
Total body irradiation
- UCB:
-
Umbilical cord blood
- URD:
-
Unrelated donor
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Acknowledgments
This work was supported in part by P30 CA023074 from the National Cancer Institute grant and Angel Charity for Children.
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The authors have no conflicts of interest to disclose.
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Drs. Menon and LM Jenkins reviewed patient records, compiled the data, and wrote the manuscript. Dr. C Jenkins reviewed the data and co-wrote the manuscript. Dr. Cui reviewed the data, provided the statistical analysis, and wrote part of the paper. Drs. Faiz Anwer and Andrew M Yeager revised the manuscript and provided intellectual content. Dr. Emmanuel Katsanis designed and supervised the study, interpreted the data, and wrote and revised the manuscript. All authors have given final approval of the version to be published and agree to be accountable for all aspects of the work.
Neethu N. Menon and Lydia M. Jenkins contributed equally to this work.
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Menon, N.N., Jenkins, L.M., Cui, H. et al. Factors associated with improved outcomes after second allogeneic hematopoietic cell transplantation for relapsed pediatric leukemia. Ann Hematol 95, 637–644 (2016). https://doi.org/10.1007/s00277-016-2599-9
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DOI: https://doi.org/10.1007/s00277-016-2599-9