Abstract:
:Atypical chronic myeloid leukemia (aCML) and chronic neutrophilic leukemia (CNL) are rare BCR-ABL1 fusion gene-negative myeloid neoplasms with a predominance of neutrophils. Since no standard therapeutic strategy currently exists for these diseases, we retrospectively evaluated the outcomes of allogeneic hematopoietic stem cell transplantation (allo-HSCT) for aCML and CNL. Data from 14 aCML and 5 CNL patients as their diagnoses were collected using a nationwide survey. Allo-HSCT was performed between 2003 and 2014. Preconditioning regimens included myeloablative (n = 15), reduced-intensity (n = 3), and non-myeloablative (n = 1) regimens. Transplanted stem cells were obtained from HLA-matched related donors (n = 5) and alternative donors (n = 14). Neutrophil engraftment was successfully achieved in 17 patients. One-year overall survival rates (OS) were 54.4% (95% confidence interval [CI], 24.8 to 76.7%) and 40.0% (95% CI, 5.2 to 75.3%) in patients with aCML and CNL, respectively. Among aCML patients, 1-year OS were 76.2% (95% CI, 33.2 to 93.5%) and 20.0% (95% CI, 0.8 to 58.2%) in patients with <5% myeloblasts (n = 9) and ≥5% myeloblasts (n = 5) in peripheral blood before allo-HSCT, respectively. These results suggest that allo-HSCT achieves long-term survival in patients with aCML and CNL. Better pre-transplant management is required to improve the outcomes of aCML patients with ≥5% blasts in peripheral blood.
journal_name
Leuk Resjournal_title
Leukemia researchauthors
Itonaga H,Ota S,Ikeda T,Taji H,Amano I,Hasegawa Y,Ichinohe T,Fukuda T,Atsuta Y,Tanizawa A,Kondo T,Miyazaki Ydoi
10.1016/j.leukres.2018.11.003subject
Has Abstractpub_date
2018-12-01 00:00:00pages
50-57eissn
0145-2126issn
1873-5835pii
S0145-2126(18)30464-8journal_volume
75pub_type
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