PMID- 36833323 OWN - NLM STAT- MEDLINE DCOM- 20230228 LR - 20240427 IS - 2073-4425 (Electronic) IS - 2073-4425 (Linking) VI - 14 IP - 2 DP - 2023 Feb 3 TI - Fusion Gene-Based Classification of Variant Cytogenetic Rearrangements in Acute Myeloid Leukemia. LID - 10.3390/genes14020396 [doi] LID - 396 AB - Acute myeloid leukemia (AML) represents a heterogeneous disease entity that is continuously moving to a more genetically defined classification. The classification of AML with recurrent chromosomal translocations, including those involving core binding factor subunits, plays a critical role in diagnosis, prognosis, treatment stratification, and residual disease evaluation. Accurate classification of variant cytogenetic rearrangements in AML contributes to effective clinical management. We report here the identification of four variant t(8;V;21) translocations in newly diagnosed AML patients. Two patients showed a t(8;14) and a t(8;10) variation, respectively, with a morphologically normal-appearing chromosome 21 in each initial karyotype. Subsequent fluorescence in situ hybridization (FISH) on metaphase cells revealed cryptic three-way translocations t(8;14;21) and t(8;10;21). Each resulted in RUNX1::RUNX1T1 fusion. The other two patients showed karyotypically visible three-way translocations t(8;16;21) and t(8;20;21), respectively. Each resulted in RUNX1::RUNX1T1 fusion. Our findings demonstrate the importance of recognizing variant forms of t(8;21) translocations and emphasize the value of applying RUNX1::RUNX1T1 FISH for the detection of cryptic and complex rearrangements when abnormalities involving chromosome band 8q22 are observed in patients with AML. FAU - Gudipati, Mary AU - Gudipati M AUID- ORCID: 0000-0002-8390-9791 AD - Department of Pathology, University of Maryland School of Medicine, Baltimore, MD 21201, USA. FAU - Butler, Melody AU - Butler M AD - Department of Pathology, University of Maryland School of Medicine, Baltimore, MD 21201, USA. FAU - Koka, Rima AU - Koka R AD - Department of Pathology, University of Maryland School of Medicine, Baltimore, MD 21201, USA. FAU - Baer, Maria R AU - Baer MR AD - Department of Medicine, University of Maryland School of Medicine, Greenebaum Comprehensive Cancer Center, Baltimore, MD 21201, USA. FAU - Ning, Yi AU - Ning Y AUID- ORCID: 0000-0001-7299-1411 AD - Department of Pathology, University of Maryland School of Medicine, Baltimore, MD 21201, USA. LA - eng GR - P30 CA134274/CA/NCI NIH HHS/United States GR - P30CA134274/CA/NCI NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural DEP - 20230203 PL - Switzerland TA - Genes (Basel) JT - Genes JID - 101551097 RN - 0 (Core Binding Factor Alpha 2 Subunit) SB - IM MH - Humans MH - *Core Binding Factor Alpha 2 Subunit/genetics MH - In Situ Hybridization, Fluorescence MH - Gene Rearrangement MH - *Leukemia, Myeloid, Acute/genetics MH - Translocation, Genetic MH - Karyotyping PMC - PMC9957481 OTO - NOTNLM OT - RUNX1::RUNX1T1 fusion OT - acute myeloid leukemia OT - complex rearrangement OT - cryptic translocation COIS- The authors declare no conflict of interest. EDAT- 2023/02/26 06:00 MHDA- 2023/03/03 06:00 PMCR- 2023/02/03 CRDT- 2023/02/25 02:14 PHST- 2022/12/20 00:00 [received] PHST- 2023/01/29 00:00 [revised] PHST- 2023/02/01 00:00 [accepted] PHST- 2023/02/25 02:14 [entrez] PHST- 2023/02/26 06:00 [pubmed] PHST- 2023/03/03 06:00 [medline] PHST- 2023/02/03 00:00 [pmc-release] AID - genes14020396 [pii] AID - genes-14-00396 [pii] AID - 10.3390/genes14020396 [doi] PST - epublish SO - Genes (Basel). 2023 Feb 3;14(2):396. doi: 10.3390/genes14020396.