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Wu C, Zhang J, Bai S, Yao J, Qiu H, Xue Y, Chen S, Wu Y, Shen J, Pan J. Clinical and molecular cytogenetic studies in ten patients with hematological malignancies characterized by t(20;21)(q11;q11) resulted from del(20q). Cancer Genet 2016; 209:456-462. [PMID: 27810074 DOI: 10.1016/j.cancergen.2016.09.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2016] [Revised: 07/26/2016] [Accepted: 09/15/2016] [Indexed: 11/16/2022]
Abstract
This study reports 10 patients with hematological malignances with t(20;21)(q11;q11) resulting from del(20q) (for example, der(20)del(20)(q11q13)t(20;21)(q11;q11) and der(21)t(20;21)(q11;q11)) and described their clinical features and the possible prognostic significance of this abnormality. The t(20;21)(q11;q11) was a rare but recurrent abnormality secondary to del(20q) besides i(20q-). The frequency of der(20)del(20)(q11q13)t(20;21)(q11;q11) among our patients with del(20q) was 2.4%. It was considered that the 20q deletion preceded translocation with chromosome 21. This abnormality is often cryptic, occurs predominantly in older men and is observed most often in myelodysplastic syndromes. Patients with this abnormality have an unfavorable prognosis, similar to patients with i(20q-). The molecular consequences of der(20)del(20)(q11q13)t(20;21)(q11;q11) may be different from patients with i(20q-). To the best of our knowledge this is the largest dataset published to date.
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Affiliation(s)
- Chunxiao Wu
- Jiangsu Institute of Hematology, Key Laboratory of Thrombosis and Hemostasis, The First Affiliated Hospital of Soochow University, 188 Shizi Street, Suzhou, 215006, China
| | - Jun Zhang
- Jiangsu Institute of Hematology, Key Laboratory of Thrombosis and Hemostasis, The First Affiliated Hospital of Soochow University, 188 Shizi Street, Suzhou, 215006, China
| | - Shuxiao Bai
- Jiangsu Institute of Hematology, Key Laboratory of Thrombosis and Hemostasis, The First Affiliated Hospital of Soochow University, 188 Shizi Street, Suzhou, 215006, China
| | | | - Huiying Qiu
- Jiangsu Institute of Hematology, Key Laboratory of Thrombosis and Hemostasis, The First Affiliated Hospital of Soochow University, 188 Shizi Street, Suzhou, 215006, China
| | - Yongquan Xue
- Jiangsu Institute of Hematology, Key Laboratory of Thrombosis and Hemostasis, The First Affiliated Hospital of Soochow University, 188 Shizi Street, Suzhou, 215006, China
| | - Suning Chen
- Jiangsu Institute of Hematology, Key Laboratory of Thrombosis and Hemostasis, The First Affiliated Hospital of Soochow University, 188 Shizi Street, Suzhou, 215006, China
| | - Yafang Wu
- Jiangsu Institute of Hematology, Key Laboratory of Thrombosis and Hemostasis, The First Affiliated Hospital of Soochow University, 188 Shizi Street, Suzhou, 215006, China
| | - Juan Shen
- Jiangsu Institute of Hematology, Key Laboratory of Thrombosis and Hemostasis, The First Affiliated Hospital of Soochow University, 188 Shizi Street, Suzhou, 215006, China
| | - Jinlan Pan
- Jiangsu Institute of Hematology, Key Laboratory of Thrombosis and Hemostasis, The First Affiliated Hospital of Soochow University, 188 Shizi Street, Suzhou, 215006, China.
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Pan J, Wu C, Xue Y, Qiu H, Chen S, Zhang J, Bai S, Wu Y, Wang Y, Shen J, Gong Y. The characteristics and prognostic analysis in 213 myeloid malignancy patients with del(20q): a report of a single-center case series. Cancer Genet 2014; 207:51-6. [DOI: 10.1016/j.cancergen.2014.02.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2013] [Revised: 02/05/2014] [Accepted: 02/06/2014] [Indexed: 11/15/2022]
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Padhi S, Varghese RG, Phansalkar MD, Sarangi R. Isolated deletion of the long arm of chromosome 20 [del(20q12)] in myelodysplastic syndrome: a case report and literature review. Singapore Med J 2013; 54:e185-9. [PMID: 24068064 DOI: 10.11622/smedj.2013119] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Isolated deletion of the long arm of chromosome 20 [del(20q12)] is a rare abnormality in patients with de novo myelodysplastic syndrome. It is characterised by refractory thrombocytopenia, minimal haematological dysplasia and a lower risk for progression to acute myeloid leukaemia. Its distinction from chronic autoimmune thrombocytopenia, although clinically and morphologically difficult, is critical. We report a case of refractory cytopenia and unilineage dysplasia in an elderly woman with isolated del(20q12), identified via fluorescence in situ hybridisation analysis of her bone marrow. In order to avoid a misdiagnosis, we suggest that cytogenetic analysis be performed on all patients suspected to have myelodysplastic syndrome with predominant thrombocytopenic presentation.
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Affiliation(s)
- Somanath Padhi
- Pondicherry Institute of Medical Sciences, Ganapathychettykulam, Puducherry 605014, India.
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Mullier F, Daliphard S, Garand R, Dekeyser M, Cornet Y, Luquet I, Talmant P, Richebourg S, Jamar M, Dogné JM, Chatelain C, Michaux L, Chatelain B. Morphology, cytogenetics, and survival in myelodysplasia with del(20q) or ider(20q): a multicenter study. Ann Hematol 2011; 91:203-13. [PMID: 21744002 DOI: 10.1007/s00277-011-1286-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2011] [Accepted: 06/16/2011] [Indexed: 10/18/2022]
Abstract
Isochromosome of the long arm of chromosome 20 with interstitial loss of material [ider(20q)] is a rare cytogenetic abnormality reported in myelodysplastic syndrome (MDS), with neither specific morphological pattern nor clear prognostic significance. The aim of this retrospective multicentric study is to compare the peripheral blood and bone marrow morphology of MDS patients with ider(20q) (n = 13) and del(20q) (n = 21) and controls (n = 47) in order to investigate whether the ider(20q) harbors specific morphological features. The secondary objective is to compare the outcome of patients from both groups. This study performed on the largest cohort of MDS patients with ider(20q) is the first that identifies specific morphological features (hypogranulated and vacuolized neutrophils and neutrophil erythrophagocytosis) allowing the identification of this cytogenetic abnormality with high sensitivity (70%) and specificity (85.7%). Suspected ider(20q) by morphology should therefore support targeted FISH tests in case of non informative karyotype. This combined approach will allow a better estimation of the prevalence of this underdiagnozed entity. The overall survival and progression-free survival did not statistically differ in both groups. However, hypogranulated and vacuolized neutrophils were significantly associated with survival.
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Affiliation(s)
- François Mullier
- Laboratory of Hematology, Namur Thrombosis and Hemostasis Center (NTHC), Namur Research Institute for LIfe Sciences (NARILIS), UCL Mont-Godinne, Avenue Gaston Therasse 1, 5530, Yvoir, Belgium.
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MacKinnon RN, Selan C, Wall M, Baker E, Nandurkar H, Campbell LJ. The paradox of 20q11.21 amplification in a subset of cases of myeloid malignancy with chromosome 20 deletion. Genes Chromosomes Cancer 2010; 49:998-1013. [DOI: 10.1002/gcc.20806] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
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Huh J, Tiu RV, Gondek LP, O'Keefe CL, Jasek M, Makishima H, Jankowska AM, Jiang Y, Verma A, Theil KS, McDevitt MA, Maciejewski JP. Characterization of chromosome arm 20q abnormalities in myeloid malignancies using genome-wide single nucleotide polymorphism array analysis. Genes Chromosomes Cancer 2010; 49:390-9. [PMID: 20095039 DOI: 10.1002/gcc.20748] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
Deletion of the long arm of chromosome 20 is a common abnormality associated with myeloid malignancies. We characterized abnormalities of chromosome 20 as defined by metaphase cytogenetics (MC) in patients with myeloid neoplasms to define commonly deleted regions (CDR) and commonly retained regions (CRR) using genome-wide, high resolution single nucleotide polymorphism array (SNP-A) analysis. We reviewed the MC results of a cohort of 1,162 patients with myeloid malignancies, including myelodysplastic syndromes (MDS), MDS/myeloproliferative neoplasia (MDS/MPN), and acute myeloid leukemia (AML). We further analyzed a subcohort of 532 patients by SNP-A using the Affymetrix Genome-Wide Human SNP Array 6.0 and GeneChip Human Mapping 250K Nsp arrays. By MC, 5% (54/1,162) harbored a deletion of 20q; in 30% (16/54), del(20q) was the sole cytogenetic abnormality. By SNP-A analysis, we identified del(20q) in 23 patients, 3 not detected by MC. In four cases, monosomy 20 with a marker chromosome by MC was proven to be an interstitial deletion of 20q by SNP-A. We defined 2 CDR and 2 CRR on chromosome arm 20q: CDR1 spanned 2.5 Mb between bands 20q11.23 and 20q12, while CDR2 encompassed 1.8 Mb within 20q13.12. CRR1 spanned 1.9 Mb within 20q11.21 and CRR2 encompassed 2.5 Mb within 20q13.33. In contrast to other chromosomes frequently affected by deletions, no somatic copy neutral loss of heterozygosity (CN-LOH) was detected. Our data suggest that SNP-A is useful for the detection of cryptic aberrations of chromosome 20q and allows for a more precise characterization of complex karyotypes. Furthermore, SNP-A allowed definition of a CDR on 20q.
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Affiliation(s)
- Jungwon Huh
- Translational Hematology and Oncology Research, Taussig Cancer Institute, Cleveland Clinic, Cleveland, OH, USA
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Douet-Guilbert N, Laï JL, Basinko A, Gueganic N, Andrieux J, Pollet B, Plantier I, Delattre C, Crépin O, Corm S, Le Bris MJ, Morel F, De Braekeleer M. Fluorescencein situhybridization characterization of ider(20q) in myelodysplastic syndrome. Br J Haematol 2008; 143:716-20. [DOI: 10.1111/j.1365-2141.2008.07436.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Shetty S, Roland B. Isoderivative chromosome 20 in bone marrow: three new cases. ACTA ACUST UNITED AC 2008; 184:72-3. [DOI: 10.1016/j.cancergencyto.2008.03.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2008] [Accepted: 03/03/2008] [Indexed: 11/26/2022]
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