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Abstract
We report the clinical features and outcome of 22 TLS-ERG+ leukemia patients (20 AML and 2 B-ALL). TLS-ERG was tightly associated with extramedullary disease (EMD), complex chromosome abnormalities, and high risk gene mutations including IKZF1, WT1, TET2, NOTCH2, and PHF6. The 6-month leukemia free survival (LFS) with and without EMD was 75% and 83.3% (p = .017). 11/20 AML patients received allogeneic hematopoietic stem cell transplantation (HCT). The 1-year overall survival (OS) in non-HCT and HCT group was 62.5% and 90% (p = .026), but the 6-month LFS in non-HCT and HCT group was 55.6% and 100% (p = .192). The 6-month LFS of patients with complete remission (CR) before HCT versus those with no response (NR) was 67.5% and 0, respectively (p = .034). In conclusion, the leukemia burden before HCT and EMD had negative impact on the outcome of TLS-ERG patients; HCT could prolong OS, but could not overcome the poor prognostic impact of TLS-ERG.
Acknowledgments
We thank Xue Chen, Pathology & Laboratory Medicine Division, Hui Wang, Flow Cytometry Facility, and Tong Wang, Cytogenetic Division, Ping Wu, Morphological Division in Hebei Yanda Lu Daopei Hospital for technical supports.
Potential conflict of interest
Disclosure forms provided by the authors are available with the full text of this article at http://dx.doi.org/10.1080/10428194.2016.1260124.