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13.02.2019 | Original Article | Ausgabe 5/2019

Annals of Hematology 5/2019

Different prognostic effects of core-binding factor positive AML with Korean AML registry data

Zeitschrift:
Annals of Hematology > Ausgabe 5/2019
Autoren:
Ho-Jin Shin, Woo-Sung Min, Yoo Hong Min, June-Won Cheong, Je-Hwan Lee, In-Ho Kim, Dae Sik Hong, Jae-Sook Ahn, Hyeoung-Joon Kim, Won-Sik Lee, Chul Won Jung, Jun-Ho Jang, Young Park, Hee-Je Kim, on behalf of the Korean Society of Hematology AML/MDS Working Party
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Abstract

Core-binding factor acute myeloid leukemia (CBF-AML) data in Asian countries has been rarely reported. We analyzed 392 patients with CBF-AML [281 with t(8;21), 111 with inv.(16)/t(16;16)] among data from 3041 patients with AML from the Korean AML Registry. Interestingly, del(9q) was less frequently detected in Korean than in German patients with t(8;21) (7.5% vs. 17%), and del(7q) was more frequently detected in Korean patients with inv(16). Overall survival (OS) was similar between patients in the first complete remission (CR) who received allogeneic (alloSCT) and autologous stem cell transplantation (ASCT) for CBF-AML. OS of t(8;21) patients was poor when undergoing alloSCT in second/third CR, while OS of inv(16) patients in second/third CR was similar to that in first CR. Patients with > 3-log reduction of RUNX1/RUNX1T1 qPCR had improved 3-year event-free survival (EFS) than those without (73.2% vs. 50.3%). Patients with t(8;21) AML with D816 mutation of the c-Kit gene showed inferior EFS and OS. These poor outcomes might be overcome by alloSCT. Multivariate analysis for OS in patients with t(8;21) revealed older age, > 1 course of induction chemotherapy to achieve CR, loss of sex chromosome, del(7q), and second/third CR or not in CR before SCT as independent prognostic variables. Especially, del(7q) is the most powerful prediction factor of poor outcomes, especially in patients with t(8;21) (hazard ratio, 27.23; P < 0.001). Further study is needed to clarify the clinical effect of cytogenetics and gene mutation in patients with CBF-AML, between Asian and Western countries.

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