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Acute Myeloid Leukemia (FAB-M2) with a Masked Type of t(8;21) Translocation Revealed by Spectral Karyotyping

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Abstract

We report a case of acute myeloid leukemia (AML), M2 subtype according to the French-American-British (FAB) classification, with extramedullary myeloblastoma of the uterus and a masked type of variant translocation of t(8;21)(q22;q22). A 45-year-old Japanese woman presented with metrorrhagia, and AML (M2) with uterine invasion was diagnosed. The patient received an allogeneic peripheral blood stem cell transplantation after remission, and her pelvis was irradiated locally. Cytogenetic study at first showed t(8;17)(q22;p13) by G-banding. Spectral karyotyping (SKY) analysis modified this interpretation to a 3-way translocation involving chromosomes 8, 17, and 21 and identified a masked type of variant t(8;21)(q22;q22) translocation. Results of fluorescence in situ hybridization using theAML1/ETO probe, and of detection of theAML1/ETO fusion transcript by reverse transcriptase—polymerase chain reaction were consistent with the karyotyping result. SKY analysis is useful to compensate for the limitations of cytogenetic studies.Int J Hematol. 2002;76:338-343.

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Correspondence to Jun-ichi Miyagi.

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Miyagi, Ji., Kakazu, N., Masuda, M. et al. Acute Myeloid Leukemia (FAB-M2) with a Masked Type of t(8;21) Translocation Revealed by Spectral Karyotyping. Int J Hematol 76, 338–343 (2002). https://doi.org/10.1007/BF02982693

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