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Han B, Jing Y, Bi X, Lin Y, Li H, Li H, Ru K, Yang S. t(2;2;21;8)(p21;q37;q22;q22), a novel four-way complex translocation involving variant t(8;21) in case of acute myeloid leukemia : A case report and literature review. Cancer Genet 2024; 284-285:1-4. [PMID: 38460349 DOI: 10.1016/j.cancergen.2024.03.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2023] [Revised: 08/25/2023] [Accepted: 03/06/2024] [Indexed: 03/11/2024]
Abstract
Chromosomal translocation serves as a crucial diagnostic marker in the classification of acute myeloid leukemia. Among the most prevalent cytogenetic abnormalities is t(8;21)(q22;q22), typically associated with the FAB subtype AML-M2. On occasion, alternative forms of t(8;21) have been observed. This report presents a case of AML with RUNX1::RUNX1T1, wherein the karyotype revealed t(2;2;21;8)(p21;q37;q22;q22), representing the first instance of a variant t(8;21) involving both chromosomes 2. The combination of routine karyotype analysis and fluorescence in situ hybridization proves to be an effective method for identifying complex translocations of t(8;21).
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MESH Headings
- Humans
- Translocation, Genetic
- Leukemia, Myeloid, Acute/genetics
- Chromosomes, Human, Pair 21/genetics
- Chromosomes, Human, Pair 8/genetics
- Core Binding Factor Alpha 2 Subunit/genetics
- In Situ Hybridization, Fluorescence
- Male
- Chromosomes, Human, Pair 2/genetics
- RUNX1 Translocation Partner 1 Protein/genetics
- Karyotyping
- Female
- Adult
- Oncogene Proteins, Fusion/genetics
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Affiliation(s)
- Bingbing Han
- Sino-US Diagnostics Lab, Tianjin Enterprise Key Laboratory of Al-aided Hematopathology Diagnosis, 5 Xinghua No.3 branch road, Tianjin, China
| | - Yu Jing
- Department of Haematology, The Fifth Medical centre of Chinese PLA General Hospital, Beijing, China
| | - Xiaoyu Bi
- Sino-US Diagnostics Lab, Tianjin Enterprise Key Laboratory of Al-aided Hematopathology Diagnosis, 5 Xinghua No.3 branch road, Tianjin, China
| | - Yani Lin
- Sino-US Diagnostics Lab, Tianjin Enterprise Key Laboratory of Al-aided Hematopathology Diagnosis, 5 Xinghua No.3 branch road, Tianjin, China
| | - Huilan Li
- Sino-US Diagnostics Lab, Tianjin Enterprise Key Laboratory of Al-aided Hematopathology Diagnosis, 5 Xinghua No.3 branch road, Tianjin, China
| | - Hongyu Li
- Sino-US Diagnostics Lab, Tianjin Enterprise Key Laboratory of Al-aided Hematopathology Diagnosis, 5 Xinghua No.3 branch road, Tianjin, China
| | - Kun Ru
- Sino-US Diagnostics Lab, Tianjin Enterprise Key Laboratory of Al-aided Hematopathology Diagnosis, 5 Xinghua No.3 branch road, Tianjin, China; Department of Pathology and Lab Medicine, Shandong Cancer Hospital, Jinan, Shandong, China
| | - Shaobin Yang
- Sino-US Diagnostics Lab, Tianjin Enterprise Key Laboratory of Al-aided Hematopathology Diagnosis, 5 Xinghua No.3 branch road, Tianjin, China.
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2
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Tsuge N, Ogasawara F, Kondo T, Yoshida S, Kojima K. Novel Four-Way t(8;14;15;21)(q22;q22;q15;q22.1) Translocation Variant in Acute Myeloid Leukemia with RUNX1::RUNX1T1. Turk J Haematol 2024; 41:128-129. [PMID: 38488305 DOI: 10.4274/tjh.galenos.2024.2024.0038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2024] Open
MESH Headings
- Humans
- Translocation, Genetic
- Leukemia, Myeloid, Acute/genetics
- Leukemia, Myeloid, Acute/diagnosis
- Core Binding Factor Alpha 2 Subunit/genetics
- RUNX1 Translocation Partner 1 Protein/genetics
- Chromosomes, Human, Pair 21/genetics
- Chromosomes, Human, Pair 8/genetics
- Chromosomes, Human, Pair 14/genetics
- Oncogene Proteins, Fusion/genetics
- Chromosomes, Human, Pair 15/genetics
- Male
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Affiliation(s)
- Noriko Tsuge
- Kochi Medical School, Department of Hematology, Nankoku, Japan
| | | | - Takumi Kondo
- Kochi Medical School, Department of Hematology, Nankoku, Japan
| | - Shohei Yoshida
- Kochi Medical School, Department of Hematology, Nankoku, Japan
| | - Kensuke Kojima
- Kochi Medical School, Department of Hematology, Nankoku, Japan
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3
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Jo YH, Han EA, Park SK, Jeon BR, Jang MA. The First Case of Acute Myeloid Leukemia With a Novel Five-way Variant Translocation of RUNX1-RUNX1T1. Ann Lab Med 2023; 43:315-318. [PMID: 36544347 DOI: 10.3343/alm.2023.43.3.315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Revised: 09/30/2022] [Accepted: 10/29/2022] [Indexed: 12/24/2022] Open
Affiliation(s)
- Yong Hun Jo
- Department of Laboratory Medicine and Genetics, Soonchunhyang University Bucheon Hospital, Soonchunhyang University College of Medicine, Bucheon, Korea
| | - Eun-Ae Han
- Department of Laboratory Medicine and Genetics, Soonchunhyang University Bucheon Hospital, Soonchunhyang University College of Medicine, Bucheon, Korea
| | - Seong Kyu Park
- Division of Hematooncology, Department of Internal Medicine, Soonchunhyang University Bucheon Hospital, Soonchunhyang University College of Medicine, Bucheon, Korea
| | - Byung Ryul Jeon
- Department of Laboratory Medicine and Genetics, Soonchunhyang University Bucheon Hospital, Soonchunhyang University College of Medicine, Bucheon, Korea
| | - Mi-Ae Jang
- Department of Laboratory Medicine and Genetics, Soonchunhyang University Bucheon Hospital, Soonchunhyang University College of Medicine, Bucheon, Korea
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Isik S, Uskudar Teke H, Gunden G, Erzurumluoglu Gokalp E, Cilingir O, Artan S, Durak Aras B. A new four-way complex translocation variant involving the t(8;5;21;4)(q21;q13,q22,q31) and the relocalization of AML1/ETO fusion gene. Cancer Genet 2021; 256-257:1-4. [PMID: 33773407 DOI: 10.1016/j.cancergen.2021.03.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Revised: 02/11/2021] [Accepted: 03/08/2021] [Indexed: 11/12/2022]
Abstract
In acute myeloid leukemia, t(8;21) detected with a frequency of 10% is associated with good prognosis. However, variant t(8;21) is observed in 4% of these cases, and although the prognostic effects of these variant translocations have not been clearly revealed, there are findings that they affect the prognosis poorly. Here, we report on a 39 years old man, detected 4-way varyant t(8;21) which include relocalization of RUNX1/RUNX1T1 fusion gene, and loss of Y chromosome. RT-PCR also confirmed RUNX1/RUNX1T1 fusion transcript. Additionally, D820G and N822K mutations on KIT gene and mut B on NMP1 gene were detected. A complete remission could not achieved after first chemotherapy treatment. Due to primary resistance and variant of t(8;21), stem cell transplantation was performed. The variant translocation we have reported is unique and also the case is the second case that was reported in the literature in terms of the relocation of the AML1/ETO fusion gene. Since c-KIT mutations and LOY were also observed, it is not possible to predict the prognosis. To highlight the importance of variant translocations and relocalization of fusion gene, more cytogenetic and molecular data are needed.
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Affiliation(s)
- Sevgi Isik
- Department of Medical Genetics, Faculty of Medicine, University of Eskisehir Osmangazi, Eskisehir, Turkey.
| | - Hava Uskudar Teke
- Department of Hematology, Faculty of Medicine, University of Eskisehir Osmangazi, Eskisehir, Turkey
| | - Gulcin Gunden
- Department of Medical Genetics, Faculty of Medicine, University of Eskisehir Osmangazi, Eskisehir, Turkey
| | - Ebru Erzurumluoglu Gokalp
- Department of Medical Genetics, Faculty of Medicine, University of Eskisehir Osmangazi, Eskisehir, Turkey
| | - Oguz Cilingir
- Department of Medical Genetics, Faculty of Medicine, University of Eskisehir Osmangazi, Eskisehir, Turkey
| | - Sevilhan Artan
- Department of Medical Genetics, Faculty of Medicine, University of Eskisehir Osmangazi, Eskisehir, Turkey
| | - Beyhan Durak Aras
- Department of Medical Genetics, Faculty of Medicine, University of Eskisehir Osmangazi, Eskisehir, Turkey.
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Kim H, Kim M, Lim J, Kim Y, Han K, Kim SY, Kim HJ. [A Case of Acute Myeloid Leukemia with Masked t(8;21).]. Korean J Lab Med 2012; 26:338-42. [PMID: 18156748 DOI: 10.3343/kjlm.2006.26.5.338] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
We report a case that revealed the characteristics of acute myeloblastic leukemia with maturation (AML-M2) on the morphology of the bone marrow biopsy and 45,X,-Y in conventional cytogenetic study, but was confirmed to have a typical AML1/ETO translocation by molecular studies using reverse transcriptase polymerase chain reaction and fluorescence in situ hybridization. Insertion of ETO gene on chromosome 8 into chromosome 21 in this patient resulted in the development of the chimeric gene, AML1/ETO, on the long arm of chromosome 21. Our final report on the patient's karyotype: 45,X,-Y.ish ins(21;8)(q22;q22q22)(AML1 +,ETO +;ETO +,AML1-). In case typical morphologic features compatible with recurrent cytogenetic abnormalities are shown, molecular studies in addition to conventional cytogenetic study might be required to confirm the diagnosis.
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Affiliation(s)
- Hyunjung Kim
- Department of Laboratory Medicine, College of Medicine, The Catholic University of Korea, Seoul, Korea.
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De Braekeleer E, Douet-Guilbert N, Morel F, Le Bris MJ, Férec C, De Braekeleer M. RUNX1 translocations and fusion genes in malignant hemopathies. Future Oncol 2011; 7:77-91. [PMID: 21174539 DOI: 10.2217/fon.10.158] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
The RUNX1 gene, located in chromosome 21q22, is crucial for the establishment of definitive hematopoiesis and the generation of hematopoietic stem cells in the embryo. It contains a 'Runt homology domain' as well as transcription activation and inhibition domains. RUNX1 can act as activator or repressor of target gene expression depending upon the large number of transcription factors, coactivators and corepressors that interact with it. Translocations involving chromosomal band 21q22 are regularly identified in leukemia patients. Most of them are associated with a rearrangement of RUNX1. Indeed, at present, 55 partner chromosomal bands have been described but the partner gene has solely been identified in 21 translocations at the molecular level. All the translocations that retain Runt homology domains but remove the transcription activation domain have a leukemogenic effect by acting as dominant negative inhibitors of wild-type RUNX1 in transcription activation.
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A novel four-way t(6;16;21;8)(p21.3;p11.2;q22;q22) in acute myeloid leukemia with RUNX1/RUNX1T1 rearrangement. ACTA ACUST UNITED AC 2009; 192:90-2. [DOI: 10.1016/j.cancergencyto.2009.03.013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2009] [Accepted: 03/19/2009] [Indexed: 11/20/2022]
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Park TS, Song J, Lee KA, Kim J, Kim SJ, Lee JH, Choi JR, Cheong JW, Park R, Hwang SH, Lee EY. Complex t(8;19;21)(q22;p13;q22) as a sole abnormality in a patient with de novo acute myeloid leukemia. ACTA ACUST UNITED AC 2008; 185:109-12. [DOI: 10.1016/j.cancergencyto.2008.05.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Kokate P, Ahmad F, Dalvi R, Das BR, Mandava S. Molecular cytogenetic investigations in a novel complex variant of t(8;21)(q22;q22) with ins(15;21)(q15;q22.2q22.3) in a patient with AML-M2 subtype. ACTA ACUST UNITED AC 2008; 184:52-6. [PMID: 18558290 DOI: 10.1016/j.cancergencyto.2008.03.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2007] [Revised: 02/29/2008] [Accepted: 03/13/2008] [Indexed: 11/18/2022]
Abstract
Acute myeloid leukemia (AML) is a clinically and molecularly heterogeneous disease characterized by the aberrant proliferation of myeloid stem cells, reduced apoptosis and blockage in cellular differentiation. The present report describes the results of hematological, cytogenetic, and fluorescence in situ hybridization (FISH) analysis in a 25-year-old man diagnosed with AML-M2. Cytogenetic as well as FISH analysis revealed a complex translocation involving four chromosomes, with the karyotype 45,-Y,der(X)t(X;8)(p21;q22),der(8)t(8;21)(q22;q22),ins(15;21)(q15;q22.2q22.3),der(21)t(8;21)(q22;q22). The breakpoints at 8q22 and 21q22 suggested a rearrangement of the RUNX1T1 (alias ETO) and RUNX1 (previously AML1) genes, respectively. Using a dual-color FISH test with RUNX1T1 and RUNX1 probes, we demonstrated an RUNX1/RUNX1T1 fusion signal on the derivative chromosome 8, establishing this translocation as a novel complex variant of t(8;21)(q22;q22).
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Affiliation(s)
- Prajakta Kokate
- Cancer Cytogenetic Division, SRL Ranbaxy Ltd., Plot No. 124, 17th Street, MIDC, Andheri (E), Mumbai 400093, India
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Ahmad F, Kokate P, Chheda P, Dalvi R, Das BR, Mandava S. Molecular cytogenetic findings in a three-way novel variant of t(1;8;21)(p35;q22;q22): a unique relocation of the AML1/ETO fusion gene 1p35 in AML-M2. ACTA ACUST UNITED AC 2008; 180:153-7. [PMID: 18206543 DOI: 10.1016/j.cancergencyto.2007.10.005] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2007] [Accepted: 10/02/2007] [Indexed: 11/29/2022]
Abstract
Acute myeloid leukemia (AML) is a malignant neoplasm of hematopoietic stem cells characterized by an abnormal proliferation of myeloid precursors, a reduced rate of apoptosis, and an arrest in cellular differentiation. The present report deals with the results of hematologic, immunophenotypic, cytogenetic, fluorescence in situ hybridization (FISH), and molecular analyses of a 53-year-old female patient diagnosed with AML-M2. Cytogenetic and FISH analysis revealed a complex translocation involving three chromosomes showing t(1;8;21)(p35;q22;q22). The observation of breakpoints at 8q22 and 21q22 suggests a rearrangement of the ETO and AML1 genes, respectively. Using a dual-color FISH test with ETO and AML1 probes, an AML1/ETO fusion signal on the derivative 1p35 instead of der(8) was demonstrated. To the best of our knowledge, this is the first report about the relocation of the AML1/ETO fusion gene to the 1p35 rather than der(8), suggesting the presence of a novel variant of t(8;21)(q22;q22) in the observed patient.
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Affiliation(s)
- Firoz Ahmad
- Research and Development, SRL Ranbaxy Ltd., MIDC, Andheri (E), Mumbai-400093, India
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