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Giansante R, Palka Bayard De Volo C, Alfonsi M, Morizio E, Guanciali Franchi P. First case of two supernumerary markers derived from chromosome 5 and chromosome 8. Mol Cytogenet 2022; 15:26. [PMID: 35761408 PMCID: PMC9237997 DOI: 10.1186/s13039-022-00601-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Accepted: 05/17/2022] [Indexed: 11/18/2022] Open
Abstract
Background Small supernumerary marker chromosomes (sSMC) are additional centric chromosome fragments too small to be identified by banding cytogenetics alone. A sSMC can originate from any chromosome and it is estimated that 70% of sSMC are de novo, while 30% are inherited. Cases of sSMC derived from chromosome 5 (sSMC5) are rare, accounting for1.4% of all reported sSMC cases. In these patients, the most common reported features are macrocephaly, dysmorphic facial features, heart defects, growth retardation, hypotonia, and intellectual disability. Also sSMC derived from chromosome 8 are very rare and the phenotype of patients with sSMC8 is very variable. Common clinical features of the patients include developmental delay, mental retardation, intellectual disability, hypotonia, hypospadias, attention deficit hyperactivity disorders (ADHD), skeletal anomalies, dysmorphic facial features, and renal dysplasia. To the best of our knowledge, in literature there are no cases with coexistence of sSMC5 and sSMC8, so we reviewed the literature to compare cases with SMC5 and those with SMC8 separately. This study is aimed to highlight the unique findings of a patient with the coexistence of sSMC5 and sSMC8. Case presentation We describe a female patient with two supernumerary markers derived from chromosome 5 (SMC5) and chromosome 8 (SMC8). The patient was born prematurely at 30 weeks with respiratory distress and bronchodysplasia. On physical examination she presented dysmorphic features, respiratory issues, congenital heart defect, developmental delay, and intellectual disability. The G-banded chromosome analysis on cultured lymphocytes revealed in all the analyzed cells a female karyotype with the presence of two supernumerary chromosomal markers and the array-CGH highlighted the region and the size of these two duplications. We also used the fluorescent in situ hybridization analysis (FISH) using painting of chromosomes 5 and 8 to confirm the origin of the two sSMC. So, the karyotype of the patient was: 48, XX, +mar1, +mar2. Conclusions This is the first case with two markers: one from chromosome 5 and one from chromosome 8. Based on the data reported, we can affirm that the phenotype of our patient is probably caused mainly by the presence of the sSMC.
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Affiliation(s)
- Roberta Giansante
- Department of Medical Genetics, "G. D'Annunzio" University, Via dei Vestini 31, 66100, Chieti, Italy.
| | | | - Melissa Alfonsi
- Department of Medical Genetics, "SS. Annunziata Hospital", Chieti, Italy
| | - Elisena Morizio
- Department of Medical Genetics, "G. D'Annunzio" University, Via dei Vestini 31, 66100, Chieti, Italy
| | - Paolo Guanciali Franchi
- Department of Medical Genetics, "G. D'Annunzio" University, Via dei Vestini 31, 66100, Chieti, Italy.,Department of Medical Genetics, "SS. Annunziata Hospital", Chieti, Italy
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Sanders AR, Beecham GW, Guo S, Badner JA, Bocklandt S, Mustanski BS, Hamer DH, Martin ER. Genome-Wide Linkage Study Meta-Analysis of Male Sexual Orientation. Arch Sex Behav 2021; 50:3371-3375. [PMID: 34080073 PMCID: PMC8604844 DOI: 10.1007/s10508-021-02035-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2019] [Revised: 05/01/2021] [Accepted: 05/04/2021] [Indexed: 05/26/2023]
Abstract
Male sexual orientation is a scientifically and socially important trait shown by family and twin studies to be influenced by environmental and complex genetic factors. Individual genome-wide linkage studies (GWLS) have been conducted, but not jointly analyzed. Two main datasets account for > 90% of the published GWLS concordant sibling pairs on the trait and are jointly analyzed here: MGSOSO (Molecular Genetic Study of Sexual Orientation; 409 concordant sibling pairs in 384 families, Sanders et al. (2015)) and Hamer (155 concordant sibling pairs in 145 families, Mustanski et al. (2005)). We conducted multipoint linkage analyses with Merlin on the datasets separately since they were genotyped differently, integrated genetic marker positions, and combined the resultant LOD (logarithm of the odds) scores at each 1 cM grid position. We continue to find the strongest linkage support at pericentromeric chromosome 8 and chromosome Xq28. We also incorporated the remaining published GWLS dataset (on 55 families) by using meta-analytic approaches on published summary statistics. The meta-analysis has maximized the positional information from GWLS of currently available family resources and can help prioritize findings from genome-wide association studies (GWAS) and other approaches. Although increasing evidence highlights genetic contributions to male sexual orientation, our current understanding of contributory loci is still limited, consistent with the complexity of the trait. Further increasing genetic knowledge about male sexual orientation, especially via large GWAS, should help advance our understanding of the biology of this important trait.
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Affiliation(s)
- Alan R Sanders
- Department of Psychiatry and Behavioral Sciences, NorthShore University HealthSystem, 1001 University Place, Evanston, IL, 60201, USA.
- Department of Psychiatry and Behavioral Neuroscience, University of Chicago, Chicago, IL, USA.
| | - Gary W Beecham
- John P. Hussman Institute for Human Genomics, University of Miami Miller School of Medicine, Miami, FL, USA
- Dr. John T. Macdonald Foundation Department of Human Genetics, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Shengru Guo
- John P. Hussman Institute for Human Genomics, University of Miami Miller School of Medicine, Miami, FL, USA
| | | | - Sven Bocklandt
- National Cancer Institute, National Institutes of Health, Bethesda, MD, USA
| | - Brian S Mustanski
- Department of Medical Social Sciences, Northwestern University, Evanston, IL, USA
| | - Dean H Hamer
- National Cancer Institute, National Institutes of Health, Bethesda, MD, USA
| | - Eden R Martin
- John P. Hussman Institute for Human Genomics, University of Miami Miller School of Medicine, Miami, FL, USA
- Dr. John T. Macdonald Foundation Department of Human Genetics, University of Miami Miller School of Medicine, Miami, FL, USA
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Jiang Y, Tang S, He F, Yuan JX, Zhang Z. New mechanism of partial duplication and deletion of chromosome 8: A case report. World J Clin Cases 2021; 9:7139-7145. [PMID: 34540970 PMCID: PMC8409188 DOI: 10.12998/wjcc.v9.i24.7139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/21/2021] [Revised: 05/23/2021] [Accepted: 06/07/2021] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND During meiosis, the recombination of homologous chromosomes produces some new heritable mutations, which are the basis of biological evolution and diversity. However, when there is pericentric inversion of chromosomes, unbalanced gametes will be formed in the process of germ cell meiosis.
CASE SUMMARY A 23-year-old pregnant woman at 25 wk of gestation wanted to terminate her pregnancy due to fetal chromosomal abnormalities. She had no exposure to toxic or hazardous substances before and during pregnancy, no history of medication usage during pregnancy, and she underwent cystectomy of ovarian cysts in 2017. On the second day of the 16th week of gestation, non-invasive prenatal testing showed chromosome 8 copy number variation. Following genetic counseling, her pregnancy was terminated.
CONCLUSION Recombinant offspring chromosome is rarely seen when the inversion segment is shorter than one-third of the chromosome length. In terms of the mechanism of chromosome 8 duplication/deletion occurrence, attention should be paid to the production of unbalanced gametes by the pairing of homologous chromosome during meiosis, and the possibility of mitotic recombination exchange as well.
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Affiliation(s)
- Yan Jiang
- Office of Prenatal Diagnosis, Mianyang People’s Hospital, Mianyang 621000, Sichuan Province, China
| | - Shuang Tang
- Office of Prenatal Diagnosis, Mianyang People’s Hospital, Mianyang 621000, Sichuan Province, China
| | - Fang He
- Department of Obstetrics, Mianyang People’s Hospital, Mianyang 621000, Sichuan Province, China
| | - Jue-Xin Yuan
- Office of Prenatal Diagnosis, Mianyang People’s Hospital, Mianyang 621000, Sichuan Province, China
| | - Zhu Zhang
- Office of Prenatal Diagnosis, West China Second University Hospital, Sichuan University, Chengdu 610000, Sichuan Province, China
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Shao HY, Miao ZY, Liu XY, Hou XF, Wu H. Molecular cytogenetic characterization of mosaicism for a small supernumerary marker chromosome derived from chromosome 8 associated with congenital hypoplasia of the tongue and review of the literature. Taiwan J Obstet Gynecol 2020; 59:323-326. [PMID: 32127158 DOI: 10.1016/j.tjog.2020.01.025] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/18/2019] [Indexed: 11/24/2022] Open
Abstract
OBJECTIVE To present molecular cytogenetic characterization of mosaic supernumerary ring chromosome 8 which has trisomy of a region of chromosome 8p12-q21.13 associated with congenital hypoplasia of the tongue and review of the literature. CASE REPORT A 27 year-old woman presented with congenital hypoplasia of the tongue. The chromosome karyotype of peripheral blood lymphocytes was detected by conventional cytogenetic analysis. The genome copy number variations were detected by SNP array. Conventional cytogenetic analysis of the peripheral blood revealed a karyotype of 47,XX,+mar[60]/46,XX[40]. SNP array revealed that there was a duplication of 45.2 Mb at arr[hg19] 8p12q21.13(36,013,636-81,263,140) × 2-3. CONCLUSION With this study a patient involving mosaic trisomy 8p12-q21.13 along with clinical properties, is described and compared to previously reported cases involving a small supernumerary marker chromosome (sSMC) derived from chromosome 8.
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Affiliation(s)
- Hui-Yuan Shao
- Medical Laboratory Center, The Affiliated Yantai Yu Huang Ding Hospital of Qingdao University Medical College, Shandong, China
| | - Zong-Yu Miao
- Medical Laboratory Center, The Affiliated Yantai Yu Huang Ding Hospital of Qingdao University Medical College, Shandong, China
| | - Xiao-Yan Liu
- Medical Laboratory Center, The Affiliated Yantai Yu Huang Ding Hospital of Qingdao University Medical College, Shandong, China
| | - Xiao-Fei Hou
- Medical Laboratory Center, The Affiliated Yantai Yu Huang Ding Hospital of Qingdao University Medical College, Shandong, China
| | - Hong Wu
- Medical Laboratory Center, The Affiliated Yantai Yu Huang Ding Hospital of Qingdao University Medical College, Shandong, China.
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Altıner Ş, Yürür Kutlay N, Ilgın Ruhi H. Mosaic Small Supernumerary Marker Chromosome Derived from Five Discontinuous Regions of Chromosome 8 in a Patient with Neutropenia and Oral Aphthous Ulcer. Cytogenet Genome Res 2020; 160:11-17. [PMID: 31982875 DOI: 10.1159/000505805] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/06/2019] [Indexed: 11/19/2022] Open
Abstract
Small supernumerary marker chromosomes (sSMCs) are characterized as additional centric chromosome fragments which are too small to be classified by cytogenetic banding alone and smaller than or equal to the size of chromosome 20 of the same metaphase spread. Here, we report a patient who presented with slight neutropenia and oral aphthous ulcers. A mosaic de novo sSMC, which originated from 5 discontinuous regions of chromosome 8, was detected in the patient. Formation of the sSMC(8) can probably be explained by a multi-step process beginning with maternal meiotic nondisjunction, followed by post-zygotic anaphase lag, and resulting in chromothripsis. Chromothripsis is a chromosomal rearrangement which occurs by breakage of one or more chromosomes leading to a fusion of surviving chromosome pieces. This case is a good example for emphasizing the importance of conventional karyotyping from PHA-induced peripheral blood lymphocytes and examining tissues other than bone marrow in patients with inconsistent genotype and phenotype.
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Nozza F, Vona G, Trino S, D'Auria F, La Rocca F, Grieco V, Possidente L, De Luca L, Musto P. A case of acute promyelocytic leukemia variant with derivative chromosome 3 der(3)t(3;8) associated with 8q partial gain. Mol Cytogenet 2019; 12:32. [PMID: 31312256 PMCID: PMC6612227 DOI: 10.1186/s13039-019-0445-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2019] [Accepted: 06/19/2019] [Indexed: 12/05/2022] Open
Abstract
Background Acute promyelocytic leukemia (APL) is characterized by fusion of PML/RARα genes as a result of t(15;17)(q24;q21). APL is now one of the curable hematological malignancies thanks to molecularly targeted therapies based on all-trans retinoic acid (ATRA) and arsenic trioxide (ATX). Extramedullary (EM) relapse is a rare event in APL, ear involvement being even more infrequent, with only six cases so far described. About 30–35% of patients with newly diagnosed APL have additional cytogenetics abnormalities, whose prognostic significance is still controversial. The most common additional aberration is trisomy 8 or partial gain 8q. Case presentation We describe here a novel unbalanced translocation der(3)t(3;8)(q29;q23.3-q24.3) associated with 8q partial gain in a 41 year-old man affected by APL in molecular remission after first line treatment, who had a responsive EM relapse in the auditory canal. Conclusions EM relapse is a rare event in APL and ear involvement is even more infrequent. To our knowledge, this is the first reported case of APL with a new der(3)t(3;8)(q29;q23.3-q24.3) and 8q partial gain associated with t(15;17)(q24;q21). Despite the recurrence of the disease at EM level, the clinical outcome of this patients was favorable.
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Affiliation(s)
- Filomena Nozza
- Laboratory of Clinical Research and Advanced Diagnostics, IRCCS-CROB, Referral Cancer Center of Basilicata, Via Padre Pio 1, 85028 Rionero in Vulture, PZ Italy
| | - Gabriella Vona
- Laboratory of Clinical Research and Advanced Diagnostics, IRCCS-CROB, Referral Cancer Center of Basilicata, Via Padre Pio 1, 85028 Rionero in Vulture, PZ Italy
| | - Stefania Trino
- Laboratory of Preclinical and Translational Research, IRCCS-CROB, Referral Cancer Center of Basilicata, Via Padre Pio 1, 85028 Rionero in Vulture, PZ Italy
| | - Fiorella D'Auria
- Laboratory of Clinical Research and Advanced Diagnostics, IRCCS-CROB, Referral Cancer Center of Basilicata, Via Padre Pio 1, 85028 Rionero in Vulture, PZ Italy
| | - Francesco La Rocca
- Laboratory of Clinical Research and Advanced Diagnostics, IRCCS-CROB, Referral Cancer Center of Basilicata, Via Padre Pio 1, 85028 Rionero in Vulture, PZ Italy
| | - Vitina Grieco
- Laboratory of Clinical Research and Advanced Diagnostics, IRCCS-CROB, Referral Cancer Center of Basilicata, Via Padre Pio 1, 85028 Rionero in Vulture, PZ Italy
| | - Luciana Possidente
- Laboratory of Clinical Research and Advanced Diagnostics, IRCCS-CROB, Referral Cancer Center of Basilicata, Via Padre Pio 1, 85028 Rionero in Vulture, PZ Italy
| | - Luciana De Luca
- Laboratory of Preclinical and Translational Research, IRCCS-CROB, Referral Cancer Center of Basilicata, Via Padre Pio 1, 85028 Rionero in Vulture, PZ Italy
| | - Pellegrino Musto
- Unit of Hematology and Stem Cell Transplantation and Hematology Department of Basilicata, IRCCS-CROB, Referral Cancer Center of Basilicata, Via Padre Pio 1, 85028 Rionero in Vulture, PZ Italy
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Valli R, Vinti L, Frattini A, Fabbri M, Montalbano G, Olivieri C, Minelli A, Locatelli F, Pasquali F, Maserati E. Bone marrow failure may be caused by chromosome anomalies exerting effects on RUNX1T1 gene. Mol Cytogenet 2018; 11:2. [PMID: 29344089 PMCID: PMC5765665 DOI: 10.1186/s13039-017-0352-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2017] [Accepted: 12/26/2017] [Indexed: 12/22/2022] Open
Abstract
Background The majority of the cases of bone marrow failure syndromes/aplastic anaemias (BMFS/AA) are non-hereditary and considered idiopathic (80–85%). The peripheral blood picture is variable, with anaemia, neutropenia and/or thrombocytopenia, and the patients with idiopathic BMFS/AA may have a risk of transformation into a myelodysplastic syndrome (MDS) and/or an acute myeloid leukaemia (AML), as ascertained for all inherited BMFS. We already reported four patients with different forms of BMFS/AA with chromosome anomalies as primary etiologic event: the chromosome changes exerted an effect on specific genes, namely RUNX1, MPL, and FLI1, leading to the disease. Results We report two further patients with non-hereditary BM failure, with diagnosis of severe aplastic anaemia and pancytopenia caused by two different constitutional structural anomalies involving chromosome 8, and possibly leading to the disorder due to effects on the RUNX1T1 gene, which was hypo-expressed and hyper-expressed, respectively, in the two patients. The chromosome change was unbalanced in one patient, and balanced in the other one. Conclusions We analyzed the sequence of events in the pathogenesis of the disease in the two patients, including a number of non-haematological signs present in the one with the unbalanced anomaly. We demonstrated that in these two patients the primary event causing BMFS/AA was the constitutional chromosome anomaly. If we take into account the cohort of 219 patients with a similar diagnosis in whom we made cytogenetic studies in the years 2003–2017, we conclude that cytogenetic investigations were instrumental to reach a diagnosis in 52 of them. We postulate that a chromosome change is the primary cause of BMFS/AA in a not negligible proportion of cases, as it was ascertained in 6 of these patients. Electronic supplementary material The online version of this article (10.1186/s13039-017-0352-2) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- R Valli
- 1Genetica Umana e Medica, Dipartimento di Medicina e Chirurgia, Università dell'Insubria, Varese, Italy
| | - L Vinti
- 2Dipartimento di Onco-Ematologia Pediatrica, Ospedale Pediatrico Bambino Gesù, Roma, Università di Pavia, Pavia, Italy
| | - A Frattini
- 1Genetica Umana e Medica, Dipartimento di Medicina e Chirurgia, Università dell'Insubria, Varese, Italy.,3Istituto di Ricerca Genetica e Biomedica, CNR, Milan, Italy
| | - M Fabbri
- 1Genetica Umana e Medica, Dipartimento di Medicina e Chirurgia, Università dell'Insubria, Varese, Italy.,4Unit of Haematopathology, European Institute of Oncology, Milan, Italy
| | - G Montalbano
- 1Genetica Umana e Medica, Dipartimento di Medicina e Chirurgia, Università dell'Insubria, Varese, Italy
| | - C Olivieri
- 5Genetica Medica, Fondazione IRCCS Policlinico S. Matteo and Università di Pavia, Pavia, Italy
| | - A Minelli
- 5Genetica Medica, Fondazione IRCCS Policlinico S. Matteo and Università di Pavia, Pavia, Italy
| | - F Locatelli
- 2Dipartimento di Onco-Ematologia Pediatrica, Ospedale Pediatrico Bambino Gesù, Roma, Università di Pavia, Pavia, Italy
| | - F Pasquali
- 1Genetica Umana e Medica, Dipartimento di Medicina e Chirurgia, Università dell'Insubria, Varese, Italy
| | - E Maserati
- 1Genetica Umana e Medica, Dipartimento di Medicina e Chirurgia, Università dell'Insubria, Varese, Italy
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Guanciali-Franchi P, Celentano C, Alfonsi M, Palka C, Di Pasqua G, Matarrelli B, Palka G. An 11.4-Mb Interstitial Deletion in a Fetus with No Apparent Phenotypic Alterations. Mol Syndromol 2016; 8:42-44. [PMID: 28232782 DOI: 10.1159/000452967] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/26/2016] [Indexed: 01/28/2023] Open
Abstract
A prenatal case of a de novo interstitial deletion distal to 8q24 was reported. Ultrasound examination and postmortem evaluation demonstrated no apparent phenotypic alterations. Array CGH showed an 11.4-Mb loss in chromosome 8 ranging from 8q24.13 to 8q24.23. This case partially overlaps the 2 cases previously described in the literature.
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Affiliation(s)
- Paolo Guanciali-Franchi
- Department of Medical Genetics, SS Annunziata Hospital, Chieti, Italy; Department of Medical Genetics, University G. D'Annunzio Chieti-Pescara, Chieti, Italy
| | - Claudio Celentano
- Department of Obstetrics and Gynecology, SS Annunziata Hospital, Chieti, Italy
| | - Melissa Alfonsi
- Department of Medical Genetics, SS Annunziata Hospital, Chieti, Italy; Department of Medical Genetics, University G. D'Annunzio Chieti-Pescara, Chieti, Italy
| | - Chiara Palka
- Department of Pediatrics, University G. D'Annunzio Chieti-Pescara, Chieti, Italy
| | - Giulietta Di Pasqua
- Department of Medical Genetics, SS Annunziata Hospital, Chieti, Italy; Department of Medical Genetics, University G. D'Annunzio Chieti-Pescara, Chieti, Italy
| | - Barbara Matarrelli
- Department of Obstetrics and Gynecology, SS Annunziata Hospital, Chieti, Italy
| | - Giandomenico Palka
- Department of Medical Genetics, SS Annunziata Hospital, Chieti, Italy; Department of Medical Genetics, University G. D'Annunzio Chieti-Pescara, Chieti, Italy
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Giraldo G, Gómez AM, Mora L, Suarez-Obando F, Moreno O. Mosaic trisomy 8 detected by fibroblasts cultured of skin. Colomb Med (Cali) 2016; 47:100-4. [PMID: 27546932 PMCID: PMC4975130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
INTRODUCTION Mosaic trisomy 8 or "Warkany's Syndrome" is a chromosomopathy with an estimated prevalance of 1:25,000 to 1:50,000, whose clinical presentation has a wide phenotypic variability. CASE DESCRIPTION Patient aged 14 years old with antecedents of global retardation of development, moderate cognitive deficit and hypothyroidism of possible congenital origin. CLINICAL FINDINGS Physical examination revealed palpebral ptosis, small corneas and corectopia, hypoplasia of the upper maxilla and prognathism, dental crowding, high-arched palate, anomalies of the extremities such as digitalization of the thumbs, clinodactyly and bilateral shortening of the fifth finger, shortening of the right femur, columnar deviation and linear brown blotches that followed Blaschko's lines. Cerebral nuclear magnetic resonance revealed type 1 Chiari's malformation and ventriculomegaly. Although the karyotype was normal in peripheral blood (46,XY), based on the finding of cutaneous mosaicism the lesions were biopsied and cytogenetic analysis demonstrated mosaic trisomy 8: mos 47,XY,+8[7]/46,XY[93]. CLINICAL RELEVANCE Trisomy 8 is clinically presented as a mosaic, universal cases being unfailingly lethal. In this particular case, cutaneous lesions identified the mosaic in tissue, although the karyotype was normal in peripheral blood. The cutaneous mosaicism represented by brown linear blotches which follow Blaschko's lines is a clinical finding that has not previously been described in Warkany's syndrome.
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Affiliation(s)
- Gustavo Giraldo
- Clínica Universitaria Bolivariana, Universidad Pontificia Bolivariana, Medellín, Colombia, Instituto de Genética Humana, Facultad de Medicina, Pontificia Universidad Javeriana, Bogotá, Colombia
| | - Ana M Gómez
- Instituto de Genética Humana, Facultad de Medicina, Pontificia Universidad Javeriana, Bogotá, Colombia
| | - Lina Mora
- Instituto de Genética Humana, Facultad de Medicina, Pontificia Universidad Javeriana, Bogotá, Colombia, Hospital Universitario San Ignacio, Bogotá, Colombia
| | - Fernando Suarez-Obando
- Instituto de Genética Humana, Facultad de Medicina, Pontificia Universidad Javeriana, Bogotá, Colombia, Hospital Universitario San Ignacio, Bogotá, Colombia
| | - Olga Moreno
- Instituto de Genética Humana, Facultad de Medicina, Pontificia Universidad Javeriana, Bogotá, Colombia
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