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Manor J, Dinu D, Azamian MS, Bi W, Darilek S, Lalani SR. A rare description of pure partial trisomy of 16q12.2q24.3 and review of the literature. Am J Med Genet A 2021; 185:2903-2912. [PMID: 34061437 DOI: 10.1002/ajmg.a.62368] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Revised: 05/09/2021] [Accepted: 05/11/2021] [Indexed: 11/11/2022]
Abstract
Trisomy 16 is the most common autosomal trisomy in humans, which is almost uniformly embryonic lethal. Partial trisomy 16 including a segment of the long arm of chromosome 16 is occasionally compatible with life and has been associated with severe congenital defects, growth retardation, and early lethality. Segmental trisomy of 16q is usually described concomitantly with partial monosomy of another chromosome, often resulting from a parental balanced translocation. Pure partial chromosome 16q trisomy is exceedingly rare. About nine children with 16q12→qter and 16q13→qter duplication have been reported in the literature, almost all described with monosomy of a second chromosome, and highlighting very few long-term survivors. A single individual with pure partial distal 16q12.1q23.3 duplication has been reported in an infant, underscoring complexities of genetic counseling and management, especially in view of life-limiting congenital anomalies in rare survivors. Here, we present a 12-month-old child with pure 16q12.2q24.3 trisomy, having continued morbidity related to pulmonary hypertension and chronic lung disease. The features of intrauterine growth retardation, facial dysmorphism, hypotonia, congenital heart defect, distal contractures, urogenital abnormalities, and hearing loss support the association with 16q partial trisomy, as in previous studies. This report expands our current understanding related to the survival of infants with large segmental aneusomy of the long arm of chromosome 16.
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Affiliation(s)
- Joshua Manor
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas, USA
| | - Daniela Dinu
- Department of Pediatrics, Neonatology section, Texas Children's Hospital, Houston, Texas, USA
| | - Mahshid S Azamian
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas, USA
| | - Weimin Bi
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas, USA.,Baylor Genetics Laboratories, Houston, Texas, USA
| | - Sandra Darilek
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas, USA
| | - Seema R Lalani
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas, USA
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Xie HH, Liu T, Zhang JB, Zhai JF, Liu Y. Partial trisomy 16q and partial monosomy 7p of a fetus derivated from paternal balanced translocation: A case report. Medicine (Baltimore) 2021; 100:e24382. [PMID: 33607772 PMCID: PMC7899829 DOI: 10.1097/md.0000000000024382] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Accepted: 12/29/2020] [Indexed: 01/05/2023] Open
Abstract
INTRODUCTION Subchromosomal deletions and duplications could currently be detected by noninvasive preliminary screening (NIPS). However, NIPS is a screening test that requires further diagnosis. Here we report a fetus with an autosomal abnormality revealed by NIPS and conventional karyotype combined with copy number variations sequencing (CNV-seq) confirmed the fetus with an unbalanced translocation. PATIENT CONCERN This was the fourth pregnancy of a 30-year-old woman who underwent 2 spontaneous abortions and gave birth to a child with a normal phenotype. The woman and her husband were healthy and nonconsanguineous. NIPS indicated a repeat of about 19-Mb fragment at the region of 16q22.1-q22.4 at 17-week gestation. DIAGNOSES The combination of traditional karyotype and CNV-seq could better locate the abnormal chromosomal region and further identify the source of fetal chromosomal abnormalities. Simultaneously, we evaluated the fetal morphology by ultrasound examination. The karyotype of the fetus was 46,XX,der(7)t(7;16)(p22;q23) and CNV-seq results showed an approximately 20.96-Mb duplication in 16q22.1-q24.3 (69200001-90160000) and an approximately 3.86-Mb deletion in 7p22.3-p22.2 (40001-3900000). Prenatal ultrasound revealed the fetal micrognathia. The paternal karyotype was 46,XY, t (7;16) (p22;q23), while the maternal was normal. The fetus inherited an abnormal chromosome 7 from its father. INTERVENTIONS No treatment for the fetus. OUTCOMES Pregnancy was terminated. CONCLUSIONS To our knowledge, the occurrence of de novo partial trisomy 16q (16q22.1-qter) and partial monosomy 7p (7p22.2-pter) has not previously been reported up to now. Here, we present the perinatal findings of such a case and a review of the literatures. CNV-seq combined with karyotype is a useful tool for chromosomal abnormalities indicated by NIPS.
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Dwivedi A, Kumar V, Ramamurthy HR. Partial Trisomy 16q21-q24.3 with Novel Cardiac Manifestation of Left Ventricular Noncompaction Cardiomyopathy: A Case Report. J Pediatr Genet 2020; 10:326-330. [PMID: 34849281 DOI: 10.1055/s-0040-1714362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2020] [Accepted: 06/07/2020] [Indexed: 10/23/2022]
Abstract
Partial trisomy 16q is most often a consequence of malsegregation from a balanced parental translocation involving chromosome 16q. It is characterized by nonspecific craniofacial dysmorphic features, hypotonia, developmental delay, psychomotor retardation, and systemic manifestations of cardiac defect, renal abnormalities, and lung abnormalities. The survival of these patients depends upon the extent and severity of the organs involved. The present literature was replete with cases of partial trisomy 16q having structural cardiac defects. However, in the present report we described a novel finding of myocardial disease in the form of left ventricular noncompaction (LVNC) cardiomyopathy associated with this genetic condition.
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Affiliation(s)
- Aradhana Dwivedi
- Department of Medical Genetics, Army Hospital (Research and Referral), New Delhi, India
| | - Vivek Kumar
- Department of Pediatric Cardiology, Army Hospital (Research and Referral), New Delhi, India
| | - H Ravi Ramamurthy
- Department of Pediatric Cardiology, Army Hospital (Research and Referral), New Delhi, India
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Mishra R, Paththinige CS, Sirisena ND, Nanayakkara S, Kariyawasam UGIU, Dissanayake VHW. Partial trisomy 16q21➔qter due to an unbalanced segregation of a maternally inherited balanced translocation 46,XX,t(15;16)(p13;q21): a case report and review of literature. BMC Pediatr 2018; 18:4. [PMID: 29310616 PMCID: PMC5759277 DOI: 10.1186/s12887-017-0980-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/02/2016] [Accepted: 12/29/2017] [Indexed: 11/30/2022] Open
Abstract
Background Partial trisomy is often the result of an unbalanced segregation of a parental balanced translocation. Partial trisomy16q is characterized by a common, yet non-specific group of craniofacial dysmorphic features, and systemic malformations with limited post-natal survival. Most of the cases of partial trisomy 16q described in the scientific literature have reported only one, or less frequently two cardiac defects in the affected babies. Herein, we report a case of partial trisomy 16q21➔qter with multiple and complex cardiac defects that have not previously been reported in association with this condition. Case presentation We report the phenotypic and cytogenetic features of a Sri Lankan female infant with partial trisomy 16q21➔qter. The baby had a triangular face with downslanting eyes, low set ears and a cleft palate. Systemic abnormalities included multiple cardiac defects, namely double outlet right ventricle, ostium secundum atrial septal defect, mild pulmonary stenosis, small patent ductus arteriosus, and bilateral superior vena cavae. An anteriorly placed anus was also observed. The proband was trisomic for 16q21➔qter chromosomal region with a karyotype, 46,XX,der(15)t(15;16)(p13;q21)mat. The chromosomal anomaly was the result of an unbalanced segregation of a maternal balanced translocation; 46,XX,t(15;16)(p13;q21). Partial trisomy 16q was established by fluorescence in-situ hybridization analysis. Conclusions The craniofacial dysmorphic features and the presence of cardiac and anorectal malformation in the proband are consistent with the phenotypic spectrum of partial trisomy 16q reported in the scientific literature. More proximal breakpoints in chromosome 16q are known to be associated with multiple cardiac abnormalities and poor long-term survival of affected cases. This report presents a unique case with multiple, complex cardiac defects that have not previously been described in association with a distal breakpoint in 16q. These findings have important diagnostic and prognostic implications.
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Affiliation(s)
- R Mishra
- Human Genetics Unit, Faculty of Medicine, University of Colombo, Kynsey Road, Colombo, 00800, Sri Lanka. .,Civil Service Hospital, Minbhawan Marg, Minbhawan, Kathmandu, 44600, Nepal.
| | - C S Paththinige
- Human Genetics Unit, Faculty of Medicine, University of Colombo, Kynsey Road, Colombo, 00800, Sri Lanka.,Faculty of Medicine and Allied Sciences, Rajarata University of Sri Lanka, Saliyapura, Anuradhapura, 50008, Sri Lanka
| | - N D Sirisena
- Human Genetics Unit, Faculty of Medicine, University of Colombo, Kynsey Road, Colombo, 00800, Sri Lanka
| | - S Nanayakkara
- Castle Street Hospital for Women, Colombo, 00800, Sri Lanka
| | - U G I U Kariyawasam
- Human Genetics Unit, Faculty of Medicine, University of Colombo, Kynsey Road, Colombo, 00800, Sri Lanka
| | - V H W Dissanayake
- Human Genetics Unit, Faculty of Medicine, University of Colombo, Kynsey Road, Colombo, 00800, Sri Lanka
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Chen CP, Hung FY, Chern SR, Wu PS, Chen YN, Chen SW, Lee CC, Wang W. Prenatal diagnosis and molecular cytogenetic characterization of de novo partial monosomy 3p (3p26.3→pter) and partial trisomy 16q (16q23.1→qter). Taiwan J Obstet Gynecol 2016; 55:288-92. [DOI: 10.1016/j.tjog.2016.02.015] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/24/2016] [Indexed: 10/21/2022] Open
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Kucharczyk M, Kochański A, Jezela-Stanek A, Kugaudo M, Sielska-Rotblum D, Gutkowska A, Krajewska-Walasek M. The first case of a patient with de novo partial distal 16q tetrasomy and a data's review. Am J Med Genet A 2014; 164A:2541-50. [DOI: 10.1002/ajmg.a.36686] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2012] [Accepted: 06/17/2014] [Indexed: 11/09/2022]
Affiliation(s)
- Marzena Kucharczyk
- Department of Medical Genetics; The Children's Memorial Health Institute; Warsaw Poland
| | - Andrzej Kochański
- Department of Medical Genetics; The Children's Memorial Health Institute; Warsaw Poland
- Neuromuscular Unit; Mossakowski Medical Research Centre; Polish Academy of Sciences; Warsaw Poland
| | | | - Monika Kugaudo
- Department of Medical Genetics; The Children's Memorial Health Institute; Warsaw Poland
- Department of Child and Adolescent Psychiatry; Medical University of Warsaw; Warsaw Poland
| | | | - Anna Gutkowska
- Department of Medical Genetics; The Children's Memorial Health Institute; Warsaw Poland
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Verhagen J, Schrander-Stumpel C, Blezer M, Weber J, Schrander J, Rubio-Gozalbo M, Bakker J, Stegmann A, Vos Y, Frints S. Adducted thumbs: A clinical clue to genetic diagnosis. Eur J Med Genet 2013; 56:153-8. [DOI: 10.1016/j.ejmg.2012.11.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2012] [Accepted: 11/28/2012] [Indexed: 10/27/2022]
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Laus AC, Baratela WAR, Laureano LAF, Santos SA, Huber J, Ramos ES, Rebelo CC, Squire JA, Martelli L. Karyotype/phenotype correlation in partial trisomies of the long arm of chromosome 16: case report and review of literature. Am J Med Genet A 2012; 158A:821-7. [PMID: 22354628 DOI: 10.1002/ajmg.a.32988] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2008] [Accepted: 05/25/2009] [Indexed: 11/08/2022]
Abstract
Trisomy 16q is a clinically recognizable entity presenting with a wide spectrum of abnormalities. Only five infants with a diagnosis of partial trisomy 16q13 → qter have been previously reported, and all died during the first year of life. We report the clinical and molecular cytogenetic findings in a patient with trisomy 16q13 → qter due to the presence of a supernumerary marker chromosome (SMC). The child presented with microcephaly, ambiguous genitalia, cardiac malformations and dysmorphic features. Cytogenetic investigation using GTG-banding, spectral karyotyping (SKY) and fluorescence in situ hybridization analyses revealed an SMC of maternal origin with karyotype der(15)t(15;16)(q13;q13). Specific genotype-phenotype correlations among different segments of the 16q region cannot yet be defined. We suggest that the involvement of the entire region spanning from 16q11 to 16q22 is necessary for the characteristic phenotype of the trisomy 16q.
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Affiliation(s)
- Ana C Laus
- Department of Genetics, School of Medicine of Ribeirao Preto, University of Sao Paulo, Ribeirao Preto, Sao Paulo, Brazil
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Chen CP, Huang MC, Su YN, Tsai FJ, Wu PC, Lee CC, Town DD, Pan CW, Wang W. Recurrent distal 16q duplication and terminal 22q deletion: prenatal diagnosis and genetic counseling. Taiwan J Obstet Gynecol 2011; 49:544-7. [PMID: 21199767 DOI: 10.1016/s1028-4559(10)60117-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/28/2010] [Indexed: 11/17/2022] Open
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10
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Hellani A, Mohamed S, Al-Akoum S, Bosley TM, Abu-Amero KK. A t(5;16)(p15.32;q23.3) generating 16q23.3 --> qter duplication and 5p15.32 --> pter deletion in two siblings with mental retardation, dysmorphic features, and speech delay. Am J Med Genet A 2010; 152A:1555-60. [PMID: 20503335 DOI: 10.1002/ajmg.a.33400] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
We report on two siblings (half brothers on the paternal side) with a syndrome consisting of delayed development, cardiac anomalies, chest deformity, hip rotation, metatarsus adductus, genital hypoplasia, dysmorphic face, depressed nasal bridge, mental retardation, and speech delay. All metaphases examined showed a normal karyotype in the patients, their father, and both mothers. High-resolution array CGH examination revealed a 16q (6 Mb) duplication dup(16)(16q23.3 --> 16qter) and a 5p (0.97 Mb) terminal deletion del(5)(p15.32 --> pter) in both affected boys but not their healthy siblings or parents. Interphase fluorescence in situ hybridization (FISH) confirmed both the 16q duplicated region and the 5p terminal deletion. Clinical abnormalities in the patients included thin upper lip, clinodactyly, and foot deformity, which were reported previously with duplications in 16q23.3. Pectus excavatum, hip rotation, metatarsus adductus, umbilical hernia, brachycephaly, and esotropia were not reported previously in chromosome 16q duplications but may be features that occur intermittently. The 5p deleted region has been associated previously only with speech delay, which was present in both patients. These patients display certain phenotypic characteristics not reported previously in 16q duplication and confirm 5p terminal deletion as an important chromosome anomaly for speech delay.
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Affiliation(s)
- Ali Hellani
- The PGD Laboratory, Saad Specialist Hospital, Al-Khobar, Saudi Arabia
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Chen CP, Lin SP, Lin CC, Li YC, Chern SR, Chen WM, Lee CC, Hsieh LJ, Wang W. Perinatal findings and molecular cytogenetic analysis of de novo partial trisomy 16q (16q22.1-->qter) and partial monosomy 20q (20q13.3-->qter). Prenat Diagn 2005; 25:112-8. [PMID: 15712324 DOI: 10.1002/pd.1083] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
OBJECTIVES To present the perinatal findings and molecular cytogenetic analysis of de novo partial trisomy 16q and partial monosomy 20q and a review of the literature. CASE AND METHODS Obstetric ultrasound at 33 weeks' gestation revealed intrauterine growth restriction (IUGR) and dolichocephaly in a 27-year-old primigravid woman. Prenatal cytogenetic diagnosis was not offered because of the late stage of gestation. A 2800-g male baby was delivered at 41 weeks' gestation by cesarean section because of fetal distress. The infant postnatally presented characteristic craniofacial dysmorphism, hypotonia, cleft palate, congenital heart defects, a subependymal cyst, and hypospadia. Cytogenetic analysis revealed an additional material attached to the terminal region of chromosome 20q. The parental karyotypes were normal. Spectral karyotyping (SKY), fluorescence in situ hybridization (FISH), and polymorphic DNA markers were used to investigate the origin of the de novo aberrant chromosome. RESULTS SKY using 24-color probes, FISH using specific 16p, 16q, 20 centromeric, and 20q telomeric probes, and polymorphic DNA marker analysis confirmed maternal origin of the duplication of distal 16q and the deletion of terminal 20q. Karyotype of the proband was designated as 46,XY.ish der(20)t(16;20)(q22.1;q13.3)(SKY+,16qTEL+,20qTEL-). CONCLUSIONS Partial trisomy 16q (16q22.1-->qter) and partial monosomy 20q (20q13.3-->qter) may be associated with the perinatal findings of IUGR, dolichocephaly, hypotonia, cleft palate, congenital heart defects, a subependymal cyst, and hypospadia. SKY, FISH, and genetic marker studies help in delineating the parental origin and the regions of the deletion and duplication in the de novo unbalanced translocation.
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MESH Headings
- Abnormalities, Multiple/diagnosis
- Abnormalities, Multiple/diagnostic imaging
- Adult
- Chromosome Deletion
- Chromosomes, Human, Pair 16
- Chromosomes, Human, Pair 20
- Cytogenetic Analysis
- DNA/analysis
- Diagnosis, Differential
- Female
- Fetal Growth Retardation/diagnosis
- Fetal Growth Retardation/diagnostic imaging
- Humans
- Infant, Newborn
- Male
- Maxillofacial Abnormalities/diagnosis
- Maxillofacial Abnormalities/diagnostic imaging
- Pregnancy
- Pregnancy Trimester, Third
- Trisomy/diagnosis
- Ultrasonography, Prenatal
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Affiliation(s)
- Chih-Ping Chen
- Department of Obstetrics and Gynecology, Mackay Memorial Hospital, Taipei, Taiwan, Republic of China.
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Chen CP, Lee CC, Wang W. Prenatal diagnosis of complete trisomy 16q in two consecutive pregnancies. Prenat Diagn 2005; 24:1019-20. [PMID: 15614876 DOI: 10.1002/pd.1034] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Stasiewicz-Jarocka B, Haus O, Van Assche E, Kostyk E, Constantinou M, Rybałko A, Krzykwa B, Marcinkowska A, Barisic I, Kucinskas V, Katuzewski B, Schwanitz G, Midro AT. Genetic counseling in carriers of reciprocal chromosomal translocations involving long arm of chromosome 16. Clin Genet 2005; 66:189-207. [PMID: 15324317 DOI: 10.1111/j.0009-9163.2004.00297.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Families with balanced chromosomal changes ascertained by unbalanced progeny, miscarriages, or by chance are interested in their probability for unbalanced offspring and other unfavorable pregnancy outcomes. This is usually done based on the original data published by Stengel-Rutkowski et al. several decades ago. That data set has never been updated. It is particularly true for the subgroup with low number of observations, to which belong reciprocal chromosomal translocations (RCTs) with breakpoint in an interstitial segment of 16q. The 11 pedigrees from original data together with the new 18 pedigrees of RCT carriers at risk of single-segment imbalance detected among 100 pedigrees of RCT carriers with breakpoint position at 16q were used for re-evaluation of the probability estimation for unbalanced offspring at birth and at second trimester of prenatal diagnosis, published in 1988. The new probability rate for unbalanced offspring after 2 : 2 disjunction and adjacent-1 segregation for the total group of pedigrees was 4 +/- 3.9% (1/25). In addition, the probability estimate for unbalanced fetuses at second trimester of prenatal diagnosis was calculated as 2/11, i.e. 18.2 +/- 11.6%. The probability rates for miscarriages and stillbirths/early deaths were about 16 +/- 7.3% (4/25) and <2% (0/25), respectively. Considering different segment lengths of 16q, higher probability rate (0/8, i.e. <6.1%) for maternal RCT carriers at risk of distal 16q segment imbalance (shorter segment) was obtained in comparison with the rate (0/10, i.e. <4.8%) for RCT at risk of proximal segment imbalance (longer segment). It supports findings obtained from the original data for RCT with other chromosomes, where the probability for unbalanced offspring generally increased with decreasing length of the segments involved in RCT. Our results were applied for five new families with RCT involving 16q, namely three at risk of single-segment imbalance [t(8;16)(q24.3;q22)GTG, ish(wcp8+,wcp16+;wcp8-,wcp16+), t(11;16)(q25;q22)GTG, and t(11;16)(q25;q13)GTG] and two with RCT at risk of double-segment imbalance [t(16;19)(q13;q13.3)GTG, isht(16;19)(q13;q13.3) (D16Z3+,16QTEL013-D19S238E+,TEL19pR-; D16Z3-, D19S238E-,TEL19pR+), and t(16;20)(q11.1;q12)GTG, m ish,t(16;20)(wcp16+,wcp20+;wcp16+,wcp20+)]. They have been presented in details to illustrate how the available empiric data could be used in practice for genetic counseling.
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Chen CP, Hsu CY, Huang JK, Lee CC, Chen WL, Wang W. Prenatal diagnosis of partial trisomy 16q and distal 22q13 deletion associated with dolichocephaly and frontal bossing on second-trimester ultrasound. Prenat Diagn 2005; 25:964-6. [PMID: 16193460 DOI: 10.1002/pd.1277] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Chen CP, Lee CC, Wang W. Prenatal diagnosis of complete trisomy 16q in two consecutive pregnancies. Prenat Diagn 2004; 24:928-9. [PMID: 15565663 DOI: 10.1002/pd.993] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Chen CP, Lin SP, Chern SR, Shih SL, Lee CC, Wang W, Liao YW. Perinatal findings and molecular cytogenetic analysis of trisomy 16q and 22q13.3 deletion. Prenat Diagn 2003; 23:504-8. [PMID: 12813767 DOI: 10.1002/pd.629] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
OBJECTIVES To present the perinatal findings and molecular cytogenetic analysis of a case with concomitant trisomy 16q and 22q13.3 deletion of paternal origin. CASE AND METHODS A 24-year-old pregnant woman was referred at 30 weeks' gestation for suspected fetal abnormalities. Sonographic examination revealed decreased fetal movement, dolicocephaly, an asymmetric skull, and intrauterine growth restriction. Prenatal karyotyping was suggested but was declined. A female baby was delivered vaginally at 39 weeks' gestation with a body weight of 2180 g. The neonate presented generalized hypotonia with frequent apneic episodes and died at 1.5 months of age. Additional physical abnormalities included epicanthal folds, ptosis, frontal bossing with an enlarged metopic suture, bitemporal narrowing, hypertelorism, epicanthal folds, a pointed chin, micrognathia, prominent ears with preauricular pits, and clinodactyly. The karyotype from peripheral blood lymphocytes was 46,XX,der(22)t(16;22)(q12.1;q13.3)pat. The microdeletion at 22q13.3 was investigated by fluorescent in situ hybridization (FISH) analysis using the LSI DiGeorge/VCFS region/ARSA dual color DNA probe and the 22q telomeric probe, of which only the latter was able to detect the subtle deletion. Molecular analysis using polymorphic microsatellite markers indicated that the breakpoint at 22q13.31 was located between loci D22S1171 (present) and D22S1168 (absent). CONCLUSION The use of LSI DiGeorge/VCFS region/ARSA dual color DNA probes to examine distal 22q would miss some subtle terminal deletions of 22q13. However, the use of 22q telomeric probes would detect these minute deletions. Fetuses having trisomy 16q and 22q13.3 deletion may prenatally manifest decreased fetal movement, dolicocephaly, an asymmetric skull, and intrauterine growth restriction and postnatally present generalized hypotonia with frequent apneic episodes.
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Affiliation(s)
- Chih-Ping Chen
- Department of Obstetrics and Gynecology, Mackay Memorial Hospital, Taipei, Taiwan, Republic of China.
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Brisset S, Joly G, Ozilou C, Lapierre JM, Gosset P, LeLorc'h M, Raoul O, Turleau C, Vekemans M, Romana SP. Molecular characterization of partial trisomy 16q24.1-qter: clinical report and review of the literature. AMERICAN JOURNAL OF MEDICAL GENETICS 2002; 113:339-45. [PMID: 12457405 DOI: 10.1002/ajmg.b.10740] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
We describe a 3(1/2)-year-old girl with psychomotor and mental retardation; dysmorphic features, including a high forehead with bitemporal narrowing; a broad nasal bridge and a broadened nose; downslanting palpebral fissures; abnormal ears; vertebral abnormalities; cardiac defect; genital hypoplasia; and anal abnormalities. The karyotype of our patient (550 bands) was normal. Molecular cytogenetic techniques, including comparative genomic hybridization (CGH) and fluorescence in situ hybridization (FISH), revealed that this girl was a carrier of a de novo derivative chromosome 7 arising from a cryptic t(7;16)(p22.3;q24.1) translocation generating a trisomy 16q24.1-qter and a 7p22.3-pter deletion. FISH with a series of specific chromosome 7p and 16q probes allowed us to delineate the chromosome 7 breakpoint between YAC660G6 (WD7S517) and YAC848A12 (D7S521, D7S31, and WI-4829) and the chromosome 16 breakpoint between BAC457K7 (D42053) and BAC44201 (SGC30711). The comparison of the clinical features of our patient with those of 2 cases of pure terminal 7p deletion and 28 cases of trisomy 16q reported in the literature allowed us to establish the following phenotype-genotype correlation for trisomy of the long arm of chromosome 16: distinctive facies (high/prominent forehead, bitemporal narrowing, periorbital edema in the neonatal period); severe mental retardation; vertebral, genital, and anal abnormalities to 16q24; distal joint contractures and camptodactyly to 16q23; cleft palate and renal anomalies to 16q22; beaked nose and gall bladder agenesis to 16q21; gut malrotation; lung and liver anomalies to 16q13; and behavior abnormalities to band 16q11-q13.
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Affiliation(s)
- S Brisset
- Service de Cytogénétique et d'Embryologie, Hôpital Necker-Enfants Malades, Paris, France
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Johnson P, Duncan K, Blunt S, Bell G, Ali Z, Cox P, Moore GE. Apparent confined placental mosaicism of trisomy 16 and multiple fetal anomalies: case report. Prenat Diagn 2000; 20:417-21. [PMID: 10820412 DOI: 10.1002/(sici)1097-0223(200005)20:5<417::aid-pd816>3.0.co;2-m] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Trisomy 16 is frequently found confined to the placenta (confined placental mosaicism (CPM)), with a structurally normal fetus. In some cases of trisomy 16, the fetus has uniparental disomy for chromosome 16 (UPD16) which is associated with intrauterine growth restriction (IUGR) and fetal anomalies. We report a case of apparent confined placental mosaicism for trisomy 16, using standard cytogenetic techniques, but with multiple fetal abnormalities including congenital diaphragmatic hernia in which there was no evidence of UPD in the disomic tissues examined. Subsequent examination of fetal tissues using fluorescent in situ hybridization (FISH) demonstrated low levels of mosaicism for trisomy 16 in all the tissues examined. The use of FISH permits identification of mosaicism which conventional techniques may not identify.
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Affiliation(s)
- P Johnson
- Department of Maternal and Fetal Medicine, Division of Paediatrics, Obstetrics and Gynaecology, Imperial College School of Medicine, London, U.K.
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Abstract
Screening for fetal cardiovascular malformations is widely performed. Its accuracy is not yet satisfactory, but better training of ultrasonographers and extension from the four-chamber view to the study of the outflow tract are probably clues to an improvement. The main impact of prenatal diagnosis is still the termination of pregnancy for severe malformations and for those associated with chromosomal or extracardiac anomalies. There is now evidence that prenatal diagnosis improves perinatal morbidity or mortality for some malformations. New information about the molecular genetic basis of congenital heart disease will help in management and counselling.
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Affiliation(s)
- T Todros
- Department of Obstetrics and Gynecology, University of Turin, Italy.
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