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Wu X, Huang B, Xie X, Cai M, Chen Y, Liang B, Shen Q, Guo D, Lin N, Su L, Xu L. Genetic evaluation for twin pregnancies using karyotyping and single nucleotide polymorphism array analysis. Gene 2024; 895:148005. [PMID: 37977315 DOI: 10.1016/j.gene.2023.148005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2023] [Revised: 11/03/2023] [Accepted: 11/14/2023] [Indexed: 11/19/2023]
Abstract
The study aimed to assess chromosomal abnormalities in twin pregnancies using karyotyping and SNP array analysis. The research involved 530 twin pregnancies from two prenatal diagnosis centers between October 2012 and October 2022. Two types of twin pregnancies were considered: monochorionic diamniotic (MCDA) and dichorionic diamniotic (DCDA), with a total of 177 MCDA and 353 DCDA cases. Chromosomal abnormalities were examined based on chorionic and amniotic sac properties and clinical indications. Among 42 twin pregnancies, 50 fetuses showed chromosomal abnormalities by karyotyping, with 35 cases of aneuploidy in DCDA and 10 in MCDA. Trisomy 21 was the most common aberration, affecting 15 fetuses in DCDA and 4 in MCDA. The rate of discordant karyotypes in MCDA and DCDA groups was 1.1% and 8.8%, respectively. Ultrasound abnormalities and advanced maternal age were frequent indications (55.3% and 39.2%, respectively). Aneuploidy frequencies in DCDA and MCDA pregnancies with advanced maternal age were 10.6% and 4.5%. Cardiac defects and increased nuchal translucency were common anomalies, with higher incidences of chromosomal abnormalities in DCDA (12.5% and 6.9%) and MCDA groups (23.5% and 3.7%). SNP array identified 1.6% clinically significant copy number variants in DCDA fetuses with ultrasound abnormalities, while no significant CNVs were found in MCDA pregnancies. Chromosomal aneuploidies were the primary abnormalities in twin pregnancies, with detectable abnormalities and clinically significant CNVs more likely in DCDA pregnancies, especially those with ultrasound abnormalities.
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Affiliation(s)
- Xiaoqing Wu
- Medical Genetic Diagnosis and Therapy Center of Fujian Maternity and Child Health Hospital, College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Medical University, Fuzhou, Fujian, China; Fujian Provincial Key Laboratory for Prenatal Diagnosis and Birth Defect, Fuzhou, Fujian, China; Department of Laboratory Medicine, Fujian Medical University, Fuzhou, Fujian, China
| | - Baojia Huang
- Prenatal Diagnosis Center, Quanzhou Women's and Children's Hospital, Quanzhou, Fujian, China
| | - Xiaorui Xie
- Medical Genetic Diagnosis and Therapy Center of Fujian Maternity and Child Health Hospital, College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Medical University, Fuzhou, Fujian, China; Fujian Provincial Key Laboratory for Prenatal Diagnosis and Birth Defect, Fuzhou, Fujian, China
| | - Meiying Cai
- Medical Genetic Diagnosis and Therapy Center of Fujian Maternity and Child Health Hospital, College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Medical University, Fuzhou, Fujian, China; Fujian Provincial Key Laboratory for Prenatal Diagnosis and Birth Defect, Fuzhou, Fujian, China
| | - Yuqin Chen
- Medical Genetic Diagnosis and Therapy Center of Fujian Maternity and Child Health Hospital, College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Medical University, Fuzhou, Fujian, China; Fujian Provincial Key Laboratory for Prenatal Diagnosis and Birth Defect, Fuzhou, Fujian, China
| | - Bin Liang
- Medical Genetic Diagnosis and Therapy Center of Fujian Maternity and Child Health Hospital, College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Medical University, Fuzhou, Fujian, China; Fujian Provincial Key Laboratory for Prenatal Diagnosis and Birth Defect, Fuzhou, Fujian, China
| | - Qingmei Shen
- Medical Genetic Diagnosis and Therapy Center of Fujian Maternity and Child Health Hospital, College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Medical University, Fuzhou, Fujian, China; Fujian Provincial Key Laboratory for Prenatal Diagnosis and Birth Defect, Fuzhou, Fujian, China
| | - Danhua Guo
- Medical Genetic Diagnosis and Therapy Center of Fujian Maternity and Child Health Hospital, College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Medical University, Fuzhou, Fujian, China; Fujian Provincial Key Laboratory for Prenatal Diagnosis and Birth Defect, Fuzhou, Fujian, China
| | - Na Lin
- Medical Genetic Diagnosis and Therapy Center of Fujian Maternity and Child Health Hospital, College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Medical University, Fuzhou, Fujian, China; Fujian Provincial Key Laboratory for Prenatal Diagnosis and Birth Defect, Fuzhou, Fujian, China.
| | - Linjuan Su
- Medical Genetic Diagnosis and Therapy Center of Fujian Maternity and Child Health Hospital, College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Medical University, Fuzhou, Fujian, China; Fujian Provincial Key Laboratory for Prenatal Diagnosis and Birth Defect, Fuzhou, Fujian, China.
| | - Liangpu Xu
- Medical Genetic Diagnosis and Therapy Center of Fujian Maternity and Child Health Hospital, College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Medical University, Fuzhou, Fujian, China; Fujian Provincial Key Laboratory for Prenatal Diagnosis and Birth Defect, Fuzhou, Fujian, China.
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Kayhan G, Calis P, Karcaaltincaba D, Tug E. Prenatal diagnosis of campomelic dysplasia due to SOX9 deletion. J OBSTET GYNAECOL 2019; 39:1175-1176. [PMID: 31234679 DOI: 10.1080/01443615.2019.1601165] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Gulsum Kayhan
- Department of Medical Genetics, Faculty of Medicine, Gazi University , Ankara , Turkey
| | - Pınar Calis
- Department of Obstetrics and Gynecology, Faculty of Medicine, Gazi University , Ankara , Turkey
| | - Deniz Karcaaltincaba
- Department of Obstetrics and Gynecology, Faculty of Medicine, Gazi University , Ankara , Turkey
| | - Esra Tug
- Department of Medical Genetics, Faculty of Medicine, Gazi University , Ankara , Turkey
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Stefanovic V. The importance of pre- and post-test counseling for prenatal cell-free DNA screening for common fetal aneuploidies. Expert Rev Mol Diagn 2019; 19:201-215. [PMID: 30657716 DOI: 10.1080/14737159.2019.1571912] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
INTRODUCTION Prenatal cell-free DNA screening for common fetal aneuploidies has rapidly changed the paradigm of prenatal care. Despite its advantages compared to conventional screening methods, its unexpectedly rapid implementation in clinical practice has generated several ethical and medical issues and misconceptions. Aggressive commercial marketing of cell-free DNA screening and media dissemination of misleading information have added confusion. Areas covered: This review provides an extensive update and will focus on the importance of pre-and post-test counseling for prenatal cell-free DNA screening not previously discussed extensively in the available literature. Additionally, we report cell-free DNA screening implementation in the largest obstetrical tertiary unit in Finland which is one of few countries that provides all prenatal screening methods free of charge for all women and has a very high uptake of first-trimester screening. This is not a systematical review, but rather a narrative overview which includes the most relevant and recent original publications and reviews covering this issue. Expert opinion: Despite being the most accurate method for screening of common fetal aneuploidies, the knowledge and counseling should be substantially improved. Cell-free DNA screening is not a replacement for diagnostic testing and its use in prenatal testing is complex and limited.
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Affiliation(s)
- Vedran Stefanovic
- a Department of Obstetrics and Gynecology , Fetomaternal Medical Center, Helsinki University and Helsinki University Hospital , Helsinki , Finland
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Vakhshori V, Alluri RK, Goldstein RY. Congenital limb deficiency requiring transfemoral amputation. BMJ Case Rep 2018; 2018:bcr-2017-223980. [PMID: 29848527 DOI: 10.1136/bcr-2017-223980] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
A healthy female infant was born from a twin pregnancy with an isolated congenital lower extremity malformation. Aside from prenatally diagnosed polyhydramnios, the infant had normal prenatal and postnatal diagnostic workup. She underwent transfemoral amputation and healed uneventfully. Congenital limb anomalies may be the result of an unidentified amniotic band, thromboembolic event or twin-twin transfusion syndrome, though in this case, prenatal screening did not indicate any evidence of a limb anomaly and postnatal workup was negative.
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Affiliation(s)
- Venus Vakhshori
- Orthopaedic Surgery, Keck School of Medicine of the University of Southern California, Los Angeles, California, USA
| | - Ram K Alluri
- Orthopaedic Surgery, Keck School of Medicine of the University of Southern California, Los Angeles, California, USA
| | - Rachel Y Goldstein
- Orthopaedic Surgery, Children's Hospital of Los Angeles, Los Angeles, California, USA
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