Clonal evolution of AML1-ETO coexisting with BCR-ABL and additional chromosome abnormalities in a blastic transformation of chronic myeloid leukemia. Issue 5 (May 2020)

• Record Type: Journal Article
• Authors: Ma, Cheng-Cheng; Chai, Ye; Chen, Hui ling; Wang, Xin; Gao, Ying; Hu, Wan li; Xiang, Xue
• Is Part Of: Journal of international medical research. Volume 48:Issue 5(2020)
• Publication Date: 2020-05
• Subjects: Clonal evolution -- AML1-ETO -- BCR-ABL -- additional chromosome -- blast crisis -- chronic myeloid leukemia; Medicine -- Periodicals; Pharmacology -- Periodicals; 610.5
• DOI: 10.1177/0300060520919237
• Languages: English
• ISSNs: 0300-0605

Abstract

Blast crisis develops in a minority of patients with chronic myeloid leukemia even in the era of tyrosine kinase inhibitor (TKI) therapy. Reports suggest that we know little about the mechanism of BCR-ABL and AML1-ETO co-expression in blast crisis of chronic myeloid leukemia, and that other chromosomal abnormalities also coexist. Here, we document an unusual and interesting case of a 51-year-old female diagnosed in the chronic phase of chronic myeloid leukemia. After undergoing TKI treatment for 3 months, her bone marrow aspirates in the chronic phase had transformed to blast crisis. Molecular genetic testing indicated she was positive for p210 form of BCR-ABL (copy number decreased from 108.91% to 56.96%) and AML1-ETO fusion (copy number, 5.65%) genes and had additional chromosomal abnormalities of t(8; 21)(q22; q22)/t(9; 22)(q34; q11), t(2; 5)(p24; q13) and an additional +8 chromosome.