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Lovatel VL, Bueno AP, Kós EAAD, Meyer LGC, Ferreira GM, Kalonji MDF, Mello FVD, Milito CB, Costa ESD, Abdelhay E, Redondo MDT, Pombo-de-Oliveira MS, Fernandez TDS. A Novel Constitutional t(3;8)(p26;q21) and ANKRD26 and SRP72 Variants in a Child with Myelodysplastic Neoplasm: Clinical Implications. J Clin Med 2023; 12:jcm12093171. [PMID: 37176611 PMCID: PMC10179081 DOI: 10.3390/jcm12093171] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Revised: 04/19/2023] [Accepted: 04/24/2023] [Indexed: 05/15/2023] Open
Abstract
BACKGROUND Childhood myelodysplastic neoplasm (cMDS) often raises concerns about an underlying germline predisposition, and its verification is necessary to guide therapeutic choice and allow family counseling. Here, we report a novel constitutional t(3;8)(p26;q21) in a child with MDS, inherited from the father, the ANKRD26 and SRP72 variants from the maternal origin, and the acquisition of molecular alterations during MDS evolution. CASE PRESENTATION A 4-year-old girl showed repeated infections and severe neutropenia. Bone marrow presented hypocellularity with dysplastic features. The patient had a t(3;8)(p26;q21)c identified by G-banding and FISH analysis. The family nucleus investigation identified the paternal origin of the chromosomal translocation. The NGS study identified ANKRD26 and SRP72 variants of maternal origin. CGH-array analysis detected alterations in PRSS3P2 and KANSL genes. Immunohistochemistry showed abnormal p53 expression during the MDS evolution. CONCLUSION This study shows for the first time, cytogenetic and genomic abnormalities inherited from the father and mother, respectively, and their clinical implications. It also shows the importance of investigating patients with constitutional cytogenetic alterations and/or germline variants to provide information to their family nucleus for genetic counseling and understanding of the pathogenesis of childhood MDS.
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Affiliation(s)
- Viviane Lamim Lovatel
- Cytogenetic Laboratory, Cell and Gene Therapy Program, Instituto Nacional do Câncer (INCA), Rio de Janeiro 20230-130, Brazil
| | - Ana Paula Bueno
- Instituto de Puericultura e Pediatria Martagão Gesteira, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-909, Brazil
- Pathology Department, Federal University of Rio de Janeiro, Rio de Janeiro 21941-599, Brazil
| | - Elaiza Almeida Antônio de Kós
- Cytogenetic Laboratory, Cell and Gene Therapy Program, Instituto Nacional do Câncer (INCA), Rio de Janeiro 20230-130, Brazil
| | - Laura Guimarães Corrêa Meyer
- Outpatient Department, Bone Marrow Transplantation Center, Instituto Nacional de Câncer, Rio de Janeiro 20230-130, Brazil
| | - Gerson Moura Ferreira
- Stem Cell Laboratory, Bone Marrow Transplantation Center, Instituto Nacional de Câncer, Rio de Janeiro 20230-130, Brazil
| | - Mayara de Fátima Kalonji
- Instituto de Puericultura e Pediatria Martagão Gesteira, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-909, Brazil
| | - Fabiana Vieira de Mello
- Instituto de Puericultura e Pediatria Martagão Gesteira, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-909, Brazil
| | - Cristiane Bedran Milito
- Pathology Department, Federal University of Rio de Janeiro, Rio de Janeiro 21941-599, Brazil
| | - Elaine Sobral da Costa
- Instituto de Puericultura e Pediatria Martagão Gesteira, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-909, Brazil
| | - Eliana Abdelhay
- Stem Cell Laboratory, Bone Marrow Transplantation Center, Instituto Nacional de Câncer, Rio de Janeiro 20230-130, Brazil
| | | | | | - Teresa de Souza Fernandez
- Cytogenetic Laboratory, Cell and Gene Therapy Program, Instituto Nacional do Câncer (INCA), Rio de Janeiro 20230-130, Brazil
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Gahrton C, Nahi H, Jansson M, Wallblom A, Alici E, Sutlu T, Samuelsson J, Gahrton G. Constitutional inv(3) in myelodysplastic syndromes. Leuk Res 2010; 34:1627-9. [PMID: 20542563 DOI: 10.1016/j.leukres.2010.05.014] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2010] [Revised: 05/09/2010] [Accepted: 05/17/2010] [Indexed: 11/15/2022]
Abstract
The constitutional pericentric inversion on chromosome 3, inv(3), is rarely found in a normal population. The aim of our study was to investigate its possible link to hematologic malignancy. Chromosomes from bone marrow cells in 890 patients with hematologic disorders were analyzed with the Q-banding technique. Thirty-four patients had inv(3) (3.8%). In 241 patients with myelodysplastic syndromes the frequency was 6.2% as opposed to 2.9% in the remaining 649 patients (p=0.02). The increased frequency of inv(3) in patients with myelodysplastic syndromes indicates that inv(3) could be a risk factor for the development of the disease.
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Affiliation(s)
- Caroline Gahrton
- Department of Medicine, Karolinska Institutet Huddinge, Stockholm, Sweden
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3
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Suh B, Song J, Kim J, Park TS, Choi JR. Constitutional Pericentric Inversion 9 in Korean Patients with Chronic Myelogenous Leukemia. Ann Lab Med 2010; 30:218-23. [DOI: 10.3343/kjlm.2010.30.3.218] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Affiliation(s)
- Borum Suh
- Department of Laboratory Medicine, Yonsei University College of Medicine, Seoul, Korea
| | - Jaewoo Song
- Department of Laboratory Medicine, Yonsei University College of Medicine, Seoul, Korea
| | - Juwon Kim
- Department of Laboratory Medicine, Yonsei University College of Medicine, Seoul, Korea
| | - Tae Sung Park
- Department of Laboratory Medicine, Kyung Hee University College of Medicine, Seoul, Korea
| | - Jong Rak Choi
- Department of Laboratory Medicine, Yonsei University College of Medicine, Seoul, Korea
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4
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Megakaryocytic blast crisis in a chronic myeloid leukemia patient with a rare variant of Philadelphia rearrangement t(9;22;22) and a constitutional translocation t(3;7). ACTA ACUST UNITED AC 2010; 199:45-7. [PMID: 20417868 DOI: 10.1016/j.cancergencyto.2010.01.017] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2009] [Revised: 12/14/2009] [Accepted: 01/25/2010] [Indexed: 10/19/2022]
Abstract
Megakaryocytic blast crisis occurs extremely rarely, accounting for <3% of cases of chronic myelogenous leukemia in blastic transformation. In chronic myeloid leukemia, a variant Philadelphia translocation is reported in 2-10% of cases. We report an unusual case of megakaryocytic blast crisis with the Philadelphia variant rearrangement t(9;22;22) and a constitutional translocation t(3;7). The breakpoint in the 22q13 region was involved in this translocation. The chromosome region 22q13 harbors MKL1 gene, which is engaged in a specific translocation associated with acute megakaryoblastic leukemia. Study of deregulation of these four genes could contribute to better understanding of the effects of the t(9;22;22) rearrangement in a megakaryocytic blast crisis.
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5
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Panani AD. Is there an association with constitutional structural chromosomal abnormalities and hematologic neoplastic process? A short review. Ann Hematol 2009; 88:293-9. [PMID: 19129995 DOI: 10.1007/s00277-008-0672-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2008] [Accepted: 12/12/2008] [Indexed: 10/21/2022]
Abstract
The occasional observation of constitutional chromosomal abnormalities in patients with a malignant disease has led to a number of studies on their potential role in cancer development. Investigations of families with hereditary cancers and constitutional chromosomal abnormalities have been key observations leading to the molecular identification of specific genes implicated in tumorigenesis. Large studies have been reported on the incidence of constitutional chromosomal aberrations in patients with hematologic malignancies, but they could not confirm an increased risk for hematologic malignancy among carriers of structural chromosomal changes. However, it is of particular interest that constitutional structural aberrations with breakpoints similar to leukemia-associated specific breakpoints have been reported in patients with hematologic malignancies. Because of insufficient data, it remains still unclear if these aberrations represent random events or are associated with malignancy. There has been a substantial discussion about mechanisms involved in constitutional structural chromosomal changes in the literature. The documentation of more patients with constitutional structural chromosomal changes could be of major importance. Most importantly, the molecular investigation of chromosomal regions involved in rearrangements could give useful information on the genetic events underlying constitutional anomalies, contributing to isolation of genes important in the development of the neoplastic process. Regarding constitutional anomalies in patients with hematologic disorders, a survey of the cytogenetic data of our cytogenetics unit is herein also presented.
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Affiliation(s)
- Anna D Panani
- Critical Care Department, Medical School of Athens University, Epsilonvangelismos Hospital, Ipsilandou 45-47, Athens 106 76, Greece.
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6
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Cancer risk in patients with constitutional chromosome deletions: a nationwide British cohort study. Br J Cancer 2008; 98:1929-33. [PMID: 18506147 PMCID: PMC2441964 DOI: 10.1038/sj.bjc.6604391] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
The finding of increased risks of specific cancers in individuals with constitutional deletions of chromosomes 11p and 13q led to the discovery of cancer predisposition genes at these locations, but there have been no systematic studies of cancer risks in patients with constitutional deletions, across the chromosome complement. Therefore, we assessed cancer incidence in comparison with national cancer incidence rates in a follow-up of 2561 patients with constitutional autosomal chromosome deletions diagnosed by microscopy or fluorescence in situ hybridisation in Britain during the period 1965-2002. Thirty cancers other than non-melanoma skin cancer occurred in the cohort (standardised incidence ratio (SIR)=2.4, 95% confidence interval (CI) 1.6-3.5). There were significantly increased risks of renal cancer in persons with 11p deletions (SIR=1869, 95% CI 751-3850; P=4 x 10(-21)), eye cancer with 13q deletions (SIR=1084, 95% CI 295-2775; P=2 x 10(-11)), and anogenital cancer with 11q deletions (SIR=305, 95% CI 63-890; P=3 x 10(-7)); all the three latter cancers were in the 11 subjects with 11q24 deletions. The results strongly suggest that in addition to suppressor genes relating to Wilms' tumour risk on 11p and retinoblastoma on 13q, there are suppressor genes around 11q24 that greatly affect anogenital cancer risk.
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Huh J, Chung W. [Incidence and types of constitutional chromosomal abnormalities in patients with hematologic malignancies.]. Korean J Lab Med 2007; 26:64-9. [PMID: 18156702 DOI: 10.3343/kjlm.2006.26.1.64] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND It is important to distinguish between the constitutional and acquired chromosomal abnormality in bone marrow of the patients with the hematologic malignancies, since the constitutional chromosomal abnormality will be continuously observed, even though in remission status of the disease. In this study, we investigated the incidence and types of constitutional chromosomal abnormalities in patients with the hematologic malignancies. METHODS This study included 396 patients with benign hematologic disorders and 634 with hematologic malignancies. The cytogenetic analysis of bone marrow aspirates were performed by direct or/and short term culture (24-48 hours). The constitutional chromosomal abnormality was confirmed by phytohemagglutinin-stimulated 72 hour culture with peripheral blood lymphocytes. RESULTS The incidence of constitutional chromosomal abnormalities was 2.8% in patients with benign hematologic disorders and 2.4% in patients with hematologic malignancies. Among the patients with constitutional chromosomal abnormalities and hematologic malignancies, 12 were males and 3 females. Eleven patients had an age greater than 20 years. One patient had trisomy 21, 1 reciprocal translocation, 1 robertsonian translocation, 3 sex chromosome aneuploidy and 9 inv(9). Two patients showed both constitutional and acquired chromosomal abnormalities on the same chromosome. The constitutional chromosomal abnormality was continuously observed in remission status of hematologic malignancies. CONCLUSIONS The incidence of the constitutional chromosomal abnormalities was low in patients with hematologic malignancies, but the chromosome study with peripheral blood or skin fibroblasts may be necessary for determining accurate cytogenetic response during follow up.
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Affiliation(s)
- Jungwon Huh
- Department of Laboratory Medicine, Ewha Womans University, College of Medicine, Seoul, Korea.
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8
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Cerretini R, Noriega MF, Narbaitz M, Slavutsky I. New chromosome abnormalities and lack of BCL-6 gene rearrangements in Argentinean diffuse large B-cell lymphomas. Eur J Haematol 2006; 76:284-93. [PMID: 16519699 DOI: 10.1111/j.1600-0609.2005.00616.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
OBJECTIVES Diffuse large B-cell lymphoma (DLBCL) is the most common form of non-Hodgkin lymphomas. Cytogenetic studies have revealed a broad spectrum of clonal genetic abnormalities and complex karyotypes. The purpose of this study was to contribute to the understanding of the genomic alterations associated with this group of lymphomas. METHODS Cytogenetic, fluorescence in situ hybridization (FISH) and molecular analyses were performed in 30 cases with DLBCL: 20 de novo DLBCL (dn-DLBCL) and 10 DLBCL secondary to follicular lymphoma (S-DLBCL). RESULTS A total of 37 different structural chromosomal rearrangements were found: 27% translocations, 54% deletions, and 19% other alterations. Chromosomes 8, 6, 2, and 9 were the most commonly affected. Interestingly, translocation t(3;14)(q27;q32) and/or BCL-6 gene rearrangements were not observed either by cytogenetic studies or by FISH analysis. Fifteen novel cytogenetic alterations were detected, among them translocations t(2;21)(p11;q22) and t(8;18)(q24;p11.3) appeared as sole structural abnormalities. Translocation t(14;18)(q32;q21) and/or BCL-2-IGH gene rearrangements were the genomic alterations most frequently observed: 50% of S-DLBCL and 30% of dn-DLBCL. Deletions del(4)(q21), del(6)(q27), del(8)(q11), and del(9)(q11) were recurrent. The most common gains involved chromosome regions at 12q13-q24, 7q10-q32, and 17q22-qter; 6q was the most frequently deleted region, followed by losses at 2q35-qter, 7q32-qter, and 9q13-qter. Four novel regions of loss were identified: 5q13-q21, 2q35-qter (both recurrent in our series), 4p11-p12, and 17q11-q12. CONCLUSIONS These studies emphasize the value of combining conventional cytogenetics with FISH and molecular studies to allow a more accurate definition of the genomic aberrations involved in DLBCL.
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MESH Headings
- Adolescent
- Adult
- Aged
- Argentina
- Chromosomes, Human/genetics
- DNA-Binding Proteins/genetics
- Female
- Humans
- In Situ Hybridization, Fluorescence/methods
- Karyotyping
- Lymphoma, B-Cell/genetics
- Lymphoma, B-Cell/pathology
- Lymphoma, Follicular/genetics
- Lymphoma, Follicular/pathology
- Lymphoma, Large B-Cell, Diffuse/genetics
- Lymphoma, Large B-Cell, Diffuse/pathology
- Male
- Middle Aged
- Neoplasms, Second Primary/genetics
- Neoplasms, Second Primary/pathology
- Proto-Oncogene Proteins c-bcl-6
- Sequence Deletion/genetics
- Translocation, Genetic/genetics
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Affiliation(s)
- Roxana Cerretini
- Departamento de Genética, Instituto de Investigaciones Hematológicas Mariano R. Castex, Academia Nacional de Medicina, Buenos Aires, Argentina.
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Bache I, Hasle H, Tommerup N, Olsen JH. Population-based study of cancer among carriers of a constitutional structural chromosomal rearrangement. Genes Chromosomes Cancer 2006; 45:231-46. [PMID: 16281259 DOI: 10.1002/gcc.20285] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
We measured the occurrence of cancer in an unselected cohort of carriers of constitutional structural rearrangements in virtually complete nationwide registries for cancer and constitutional cytogenetic abnormalities. We identified 4,816 carriers of a constitutional structural rearrangement in the Danish Cytogenetic Registry and searched for cancer diagnoses by linkage to the Danish Cancer Registry. There was no overall increased risk for cancer among carriers (standardized incidence ratio [SIR], 0.96; 95% confidence interval [CI], 0.84-1.10), and no significant difference from that expected was found in balanced and unbalanced rearrangements or in any subtypes of rearrangements. We found significantly lower risks for carriers with rearrangements involving chromosome 21 (SIR, 0.50; 95% CI, 0.22-0.99) and for paternally inherited rearrangements (SIR, 0.30; 95% CI, 0.06-0.88). Risk estimates for the observed type-specific cancers showed an increased risk for non-Hodgkin lymphoma (SIR, 2.11; 95% CI, 1.09-3.69). However, subgroup analyses were not guided by study hypotheses, and our statistical evaluation of the data should be looked upon as exploratory. In addition, we found 12 constitutional structural rearrangements with a breakpoint potentially associated with a cancer-related gene. Potential new loci associated with type-specific cancers were suggested by the findings of families with more than one affected carrier and by the involvement of the same cytogenetic bands in unrelated carriers. Molecular mapping of these breakpoints might provide new insight into cancer predisposition.
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Affiliation(s)
- Iben Bache
- Wilhelm Johannsen Centre for Functional Genome Research, Department of Medical Biochemistry and Genetics, University of Copenhagen, Denmark.
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10
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Kajtár B, Deák L, Kalász V, Pajor L, Molnár L, Méhes G. Multiple Constitutional Chromosome Translocations of Familial Nature in Philadelphia Chromosome-Positive Chronic Myeloid Leukemia: A Report on a Unique Case. Int J Hematol 2005; 82:347-50. [PMID: 16298829 DOI: 10.1532/ijh97.e0504] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
A case of Philadelphia chromosome-positive (Ph(+)) chronic myeloid leukemia (CML) featuring 2 additional balanced translocations, t(2;5) and t(6;12), as well as a robertsonian translocation, t(13;14), was diagnosed by routine bone marrow karyotyping. The breakpoints did not involve previously described CML-related chromosomal regions in any of the 3 translocations. Despite the patient's partial response following imatinib therapy, all Ph(-) bone marrow metaphases persistently had the 3 additional chromosomal changes. Moreover, stimulated peripheral B-lymphocytes from the patient also showed the same chromosomal changes, suggesting that we had found a complex constitutional chromosome aberration unrelated to the leukemia. Peripheral blood karyotype analyses of 6 of the 7 closest relatives from 3 generations demonstrated at least 1 of these aberrations, although in different combinations. Standard bone marrow or peripheral blood karyotyping of hematologic disorders may uncover otherwise symptomless, unrelated constitutional changes together with disease-specific chromosome aberrations.A triple constitutional chromosome aberration combined with a hematologic disorder has not been described until now. In addition, multiple constitutional aberrations persisting through at least 3 generations seem to be extremely rare. At present, no direct evidence exists to support a causative relationship between the familial translocations and leukemogenesis.
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Affiliation(s)
- Béla Kajtár
- Department of Pathology, 1st Department of Internal Medicine, University of Pécs, Hungary
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11
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Ganly P, McDonald M, Spearing R, Morris CM. Constitutional t(5;7)(q11;p15) rearranged to acquire monosomy7q and trisomy 1q in a patient with myelodysplastic syndrome transforming to acute myelocytic leukemia. ACTA ACUST UNITED AC 2004; 149:125-30. [PMID: 15036888 DOI: 10.1016/j.cancergencyto.2003.07.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2003] [Accepted: 07/30/2003] [Indexed: 12/31/2022]
Abstract
We report the case of a 61-year-old woman who presented with a myelodysplastic syndrome (MDS) and a t(5;7)(q11.2;p15) in her bone marrow cells. Subsequent analysis of phytohemagglutinin-stimulated peripheral blood lymphocytes and cultured skin fibroblasts showed that the translocation was constitutional. Disruption of chromosome bands 5q11.2 and 7p15 has been described recurrently in MDS and acute myelocytic leukemia (AML) and, although the age of onset was not earlier than usual, it is nonetheless possible that genes interrupted by this translocation may been a predisposing factor for her condition. With progression to AML, a further rearrangement of the constitutional der(7)t(5;7) occurred, involving chromosome arm 1q. Fluorescence in situ hybridization (FISH) with whole-chromosome paints showed that the result of the second rearrangement, a t(1;7)(q32.1;q32), was observed, leading to trisomy of the segment 1q32.1 approximately qter and monosomy of the segment 7q32.1 approximately qter. The acquired imbalances, particularly loss of 7q, are commonly associated with MDS/AML and a poor prognosis; however, this patient remained in remission after treatment for more than two years before AML relapse, perhaps because the affected regions fall outside of the critical regions of imbalance.
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MESH Headings
- Bone Marrow Cells
- Cell Transformation, Neoplastic/genetics
- Chromosome Deletion
- Chromosome Painting
- Chromosomes, Human, Pair 1
- Chromosomes, Human, Pair 5
- Chromosomes, Human, Pair 7
- Female
- Humans
- Leukemia, Myeloid, Acute/genetics
- Middle Aged
- Myelodysplastic Syndromes/genetics
- Translocation, Genetic
- Trisomy
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Affiliation(s)
- Peter Ganly
- Cancer Genetics Research Group, Christchurch School of Medicine, PO Box 4345, Christchurch, New Zealand
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12
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Welborn J. Constitutional chromosome aberrations as pathogenetic events in hematologic malignancies. ACTA ACUST UNITED AC 2004; 149:137-53. [PMID: 15036890 DOI: 10.1016/s0165-4608(03)00301-7] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2003] [Accepted: 07/11/2003] [Indexed: 10/26/2022]
Abstract
A predisposition to tumor development is associated with some constitutional chromosomal abnormalities. Investigations of families with an apparent hereditary cancer and constitutional chromosome rearrangements have led to the molecular identification of tumor suppressor genes. Under the somatic mutation theory for the development of cancer, two mutational events are required. The first step may be a constitutional event and the second an acquired genetic mutation. Cytogenetic studies were performed on 5633 bone marrow specimens from patients with hematologic malignancies from a single institution. Fifty cases of constitutional chromosome aberrations were detected. Data collected from the literature and from our series are reviewed and compared with the incidence of specific constitutional chromosome aberrations in the newborn population. Possible mechanisms that may predispose individuals with constitutional chromosome aberrations to the development of a hematologic malignancy are reviewed.
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Affiliation(s)
- Jeanna Welborn
- Department of Internal Medicine and Pathology, University of California at Davis Medical Center, UCDMC Cancer Center, Room 3017, 4501 X Street, Sacramento, CA 95817, USA.
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Chena C, Arrossagaray G, Scolnik M, Palacios MF, Slavutsky I. Interphase cytogenetic analysis in Argentinean B-cell chronic lymphocytic leukemia patients: association of trisomy 12 and del(13q14). ACTA ACUST UNITED AC 2003; 146:154-60. [PMID: 14553950 DOI: 10.1016/s0165-4608(03)00136-5] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
We have evaluated genomic aberrations by conventional cytogenetics and fluorescence in situ hybridization (FISH) analysis in a series of 57 Argentinean B-cell chronic lymphocytic leukemia (B-CLL) patients. The studies were performed on stimulated peripheral blood lymphocytes. FISH analysis for trisomy 12, 13q14 deletion, and monosomy of TP53 (also known as p53) was performed according to standard protocols. Our results showed 46.3% of patients with clonal chromosomal alterations by conventional cytogenetics and 80.7% by FISH. Trisomy 12 was found in 21.9% of patients by G-banding analysis and in 35% by FISH studies. Allelic loss of 13q14 was observed in 63.2% patients, most of them showing D13S319 and D13S25 deletion; 11% of patients showed TP53 monosomy. Coexistence of trisomy 12 and 13q14 deletion was found in 17.5% of patients. In this group, deletion 13q14 was the prevalent clone, with percentages 25-35% higher than those observed for trisomy 12, suggesting clonal evolution. The coexistence of trisomy 12 with deletion 13q14 was observed in a higher frequency than reported in the literature. A probable adverse prognosis is suggested for this group of patients, likely related to clonal evolution.
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Affiliation(s)
- Christian Chena
- Departamento de Genética, Instituto de Investigaciones Hematológicas, Academia Nacional de Medicina, Buenos Aires, Argentina.
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14
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Passmore SJ, Chessells JM, Kempski H, Hann IM, Brownbill PA, Stiller CA. Paediatric myelodysplastic syndromes and juvenile myelomonocytic leukaemia in the UK: a population-based study of incidence and survival. Br J Haematol 2003; 121:758-67. [PMID: 12780790 DOI: 10.1046/j.1365-2141.2003.04361.x] [Citation(s) in RCA: 82] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
We aimed to identify and classify cases of paediatric myelodysplastic syndromes (MDS) occurring in Britain to estimate the incidence of this rare group of diseases, investigate the results of therapy and identify prognostic risk factors. Patients aged below 15 years at diagnosis were collected from England, Scotland and Wales, inclusively between 1990 and 1999. One hundred and thirty-five patients were accepted as de novo MDS or juvenile myelomonocytic leukaemia (JMML). The incidence for this period was 1.35 per million (age standardized rate) which is below that reported outside the UK. The overall survival was 45%[standard error (SE) = 4%] at 5 years: 40% (SE = 6%) for JMML and 50% (SE = 6%) for other MDS. Significant adverse prognostic factors for JMML were a platelet count < 40 x 10(9)/l, raised fetal haemoglobin, FPC score and age above 2 years at diagnosis, for other MDS only monosomy 7 was significant. To conclude, the incidence of MDS/JMML in children in the UK appears to be lower than that reported outside the UK. This may be either a real difference in incidence or variation in reporting. Monosomy 7 is associated with poor outcome in MDS other than JMML. The prognosis of JMML depends on age, platelet count and fetal haemoglobin.
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