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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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Papadopoulou Z, Papoulidis I, Sifakis S, Markopoulos G, Vetro A, Vlaikou AM, Ziegler M, Liehr T, Thomaidis L, Zuffardi O, Syrrou M, George K, Manolakos E. Partial monosomy 8p and trisomy 16q in two children with developmental delay detected by array comparative genomic hybridization. Mol Med Rep 2017; 16:8808-8818. [PMID: 29039589 PMCID: PMC5779959 DOI: 10.3892/mmr.2017.7760] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2016] [Accepted: 02/07/2017] [Indexed: 11/06/2022] Open
Abstract
Two cases of liveborn unrelated children with developmental delay and overlapping unbalanced translocations der(8)t(8;16)(p23.2;q23.3) and der (8)t(8;16)(p23.1;q23.1), leading to partial monosomy 8p and partial trisomy 16q, are reported in the present study. The first patient was a 10-year-old boy with mild developmental delay and minor congenital anomalies (borderline microcephaly, clinodactyly, hypertelorism, epicanthus, mild systolic murmur and kidney reflux). The second patient was a 3 year-old girl with developmental delay, gross motor milestone delay and dysmorphic features. Array-comparative genomic hybridization analysis revealed that partial chromosome 8p monosomy extended from 8p23.2 to 8pter (4.8 Mb) in Patient 1 and from 8p23.1 to 8pter (9.5 Mb) in Patient 2, and partial chromosome 16 trisomy extended from 16q23.3 to 16qter (5.6 Mb) in Patient 1 and from 16q23.1 to 16qter (11.7 Mb) in Patient 2. The mechanism of appearance of the rearrangement in association with the genes involved and the architecture of the region is discussed.
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Affiliation(s)
- Zoe Papadopoulou
- Laboratory of Biology, Faculty of Medicine, School of Health Sciences, University of Ioannina, Ioannina 45110, Greece
| | - Ioannis Papoulidis
- Access To Genome, Laboratory of Genetics, Athens 11528‑Thessaloniki 55134, Greece
| | - Stavros Sifakis
- Department of Obstetrics and Gynecology, University Hospital of Heraklion, Heraklion 71201, Greece
| | - Georgios Markopoulos
- Laboratory of Biology, Faculty of Medicine, School of Health Sciences, University of Ioannina, Ioannina 45110, Greece
| | - Annalisa Vetro
- Department of Molecular Medicine, University of Pavia, I‑27100 Pavia, Italy
| | - Angeliki-Maria Vlaikou
- Laboratory of Biology, Faculty of Medicine, School of Health Sciences, University of Ioannina, Ioannina 45110, Greece
| | - Monica Ziegler
- Jena University Hospital, Friedrich Schiller University, Institute of Human Genetics, D‑07743 Jena, Germany
| | - Thomas Liehr
- Jena University Hospital, Friedrich Schiller University, Institute of Human Genetics, D‑07743 Jena, Germany
| | - Loretta Thomaidis
- Developmental Assessment Unit, 2nd Department of Pediatrics, P. & A. Kyriakou Children's Hospital, National and Kapodistrian University of Athens School of Medicine, Athens 11527, Greece
| | - Orsetta Zuffardi
- Department of Molecular Medicine, University of Pavia, I‑27100 Pavia, Italy
| | - Maria Syrrou
- Laboratory of Biology, Faculty of Medicine, School of Health Sciences, University of Ioannina, Ioannina 45110, Greece
| | - Kitsos George
- Department of Ophthalmology, University of Ioannina, Ioannina 45110, Greece
| | - Emmanouil Manolakos
- Access To Genome, Laboratory of Genetics, Athens 11528‑Thessaloniki 55134, Greece
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