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Similar Survival But Less Chronic GVHD in Antithymocyte Globulin–Based Myeloablative Haploidentical Transplant Compared With Matched Sibling Transplant for Adult T-cell Acute Lymphoblastic Leukemia/Lymphoma
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Similar Survival But Less Chronic GVHD in Antithymocyte Globulin–Based Myeloablative Haploidentical Transplant Compared With Matched Sibling Transplant for Adult T-cell Acute Lymphoblastic Leukemia/Lymphoma
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Similar Survival But Less Chronic GVHD in Antithymocyte Globulin–Based Myeloablative Haploidentical Transplant Compared With Matched Sibling Transplant for Adult T-cell Acute Lymphoblastic Leukemia/Lymphoma
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Journal Article
Similar Survival But Less Chronic GVHD in Antithymocyte Globulin–Based Myeloablative Haploidentical Transplant Compared With Matched Sibling Transplant for Adult T-cell Acute Lymphoblastic Leukemia/Lymphoma
2024
Overview
The annual number of human leukocyte antigen (HLA)-haploidentical allogeneic hematopoietic stem cell transplantation (haplo-HCT) is increasing steadily. Comparative studies about haplo-HCT versus HCT with HLA-matched sibling donors (MSD-HCT) have been tried in acute myeloid leukemia and B-cell acute lymphoblastic leukemia/lymphoma (ALL). Few studies were reported in adult T-cell ALL (T-ALL). In this retrospective study, a total of 88 consecutive patients with T-ALL were enrolled who underwent MSD-HCT (n = 24) and haplo-HCT (n = 64) with antithymocyte globulin (ATG)-based graft versus host disease (GVHD) prophylaxis between 2010 and 2022. Median follow-up for survivors was similar (43.5 [range: 7–88] months for MSD-HCT versus 43.5 (range: 6–144) months in the Haplo-HCT group). The 100-day cumulative incidence of grade II to IV acute GVHD (aGVHD) was similar, 33% (95% confidence interval [CI], 16%–52%) after MSD-HCT versus 44% (95% CI, 31%–55%) after haplo-HCT, P = 0.52. The cumulative incidences of grade III–IV aGVHD were 8% (95% CI, 1%–23%) in the MSD-HCT group and 5% (95% CI, 1%–12%) in the haplo-HCT group (P = 0.50). The 2-year cumulative incidence of chronic GVHD (limited and extensive) in the haplo-HCT, 11% (95% CI, 5%–20%) was significantly lower than that in the MSD-HCT group (42% [95% CI, 21%–62%], P = 0.002). The cumulative incidence of 4-year relapse rates (44% versus 37%, P = 0.56) and non-relapse mortality (7% versus 21%, P = 0.08) did not differ between these two groups. There were also no differences in 4-year overall survival (46% versus 47%, P = 0.44) and progression-free survival (49% versus 42%, P = 0.45) between these two groups. On multivariate analysis, using busulfan/fludarabine (BU/Flu) conditioning regimen was found to be associated with worse clinical outcome. Our results suggested that ATG-based haplo-HCT platform could work as an alternative to MSD-HCT for adult patients with T-ALL. Compared with MSD-HCT, haplo-HCT might carry a low risk for cGVHD.
Publisher
SAGE Publications,Sage Publications Ltd,SAGE Publishing
Subject
/ Adult
/ Antilymphocyte Serum - therapeutic use
/ Busulfan
/ Female
/ Hematopoietic Stem Cell Transplantation - adverse effects
/ Hematopoietic Stem Cell Transplantation - methods
/ Histocompatibility antigen HLA
/ Humans
/ Leukemia
/ Lymphoma
/ Male
/ Original
/ Siblings
/ Transplantation Conditioning - methods
/ Transplantation, Haploidentical - methods
