1
|
Manju HC, Bevinakoppamath S, Bhat D, Prashant A, Kadandale JS, Sairam PVVG. Supernumerary derivative 22 chromosome resulting from novel constitutional non-Robertsonian translocation: t(20;22)-Case Report. Mol Cytogenet 2022; 15:14. [PMID: 35346304 PMCID: PMC8962060 DOI: 10.1186/s13039-022-00591-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Accepted: 03/15/2022] [Indexed: 12/02/2022] Open
Abstract
Background Maternal non-Robertsonian translocation-t(20;22)(q13;q11.2) between chromosomes 20 and 22resulting in an additional complex small supernumerary marker chromosome as derivative (22)inherited to the proband is not been reported yet.
Case presentation A 4 years old boy with a history of developmental delay, low set ears, and facial dysmorphism was presented to the genetic clinic. Periauricular pit, downward slanting eyes, medially flared eyebrows, downturned mouth corners, and micrognathia were observed. He had congenital heart defect with atrial septal defect (ASD), ventricular septal defect (VSD), and central nervous system (CNS) anomalies with the gross cranium. Karyotype analysis, Fluorescent in-situ hybridization analysis (FISH), and Chromosomal microarray analysis (CMA) were used to determine the chromosomal origin and segmental composition of the derivative 22 chromosome. Karyotype and FISH analyses were performed to confirm the presence of a supernumerary chromosome, and Microarray analysis was performed to rule out copy number variations in the proband's 22q11.2q12 band point. The probands' karyotype revealed the inherited der(22)t(20;22)(q13;q11.2)dmat. Parental karyotype confirmed the mother as the carrier, with balanced non-Robertsonian translocation-46,XX,t(20;22)(q13;q11.2). Conclusion The mother had a non-Robertsonian translocation t(20;22)(q13;q11.2) between chromosomes 20 and 22, which resulted in Emanuel syndrome in the proband. The most plausible explanation is 3:1 meiotic malsegregation, which results in the child inheriting derivative chromosome. The parental karyotype study aided in identifying the carrier of the supernumerary der(22), allowing future pregnancies with abnormal offspring to be avoided.
Collapse
Affiliation(s)
- H C Manju
- Department of Medical Genetics, JSS Medical College, JSS Academy of Higher Education & Research, Mysuru, India
| | - Supriya Bevinakoppamath
- Department of Medical Genetics, JSS Medical College, JSS Academy of Higher Education & Research, Mysuru, India
| | - Deepa Bhat
- Department of Anatomy, JSS Medical College, JSS Academy of Higher Education & Research, Mysuru, India.,Center for Medical Genetics & Counseling, JSS Hospital, Mysuru, India.,Special Interest Group - Human Genomics & Rare Disorders, JSS Academy of Higher Education & Research, Mysuru, India
| | - Akila Prashant
- Center for Medical Genetics & Counseling, JSS Hospital, Mysuru, India.,Special Interest Group - Human Genomics & Rare Disorders, JSS Academy of Higher Education & Research, Mysuru, India.,Department of Biochemistry, JSS Medical College, JSS Academy of Higher Education & Research, Mysuru, India
| | | | - P V V Gowri Sairam
- Department of Medical Genetics, JSS Medical College, JSS Academy of Higher Education & Research, Mysuru, India. .,Center for Medical Genetics & Counseling, JSS Hospital, Mysuru, India. .,Special Interest Group - Human Genomics & Rare Disorders, JSS Academy of Higher Education & Research, Mysuru, India.
| |
Collapse
|
2
|
Hao X, Wu J, Fu W, Zhang R, Zhong S, Deng Y, Zhu Y, Ye Y, Fang Q. Prenatal Diagnosis of Fetuses with Emanuel Syndrome: Results of Ultrasound Examination and Invasive Genetic Testing. Prenat Diagn 2022; 42:469-477. [PMID: 35043432 DOI: 10.1002/pd.6098] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2021] [Revised: 12/26/2021] [Accepted: 12/27/2021] [Indexed: 11/12/2022]
Abstract
OBJECTIVE To investigate prenatal manifestations of Emanuel syndrome (ES) by retrospectively analyzing the results of prenatal diagnosis. METHODS Thirteen fetuses were collected from 5 hospitals, of which six were confirmed with 47,der(22)t(11;22) (ES) by karyotype and chromosomal microarray analysis (CMA). Seven were diagnosed with 46,t(11;22) balanced translocations by karyotype, including one de novo mosaic 46,XX,t(11;22). In 3/7, CMA was performed but did not identify chromosomal imbalances. The results of prenatal diagnoses were reviewed, including ultrasound examinations and genetic testing. RESULTS In ES fetuses, the derivative 22 was consistently inherited from the mother, while in the balanced translocation group, the t(11;22) chromosome was of paternal origin in 3/6 cases, All ES fetuses presented with multiple abnormalities by ultrasound examinations. Diaphragm hernia (3/6), Dandy-Walker complex (3/6), and kidney aplasia (3/6), were the most common ultrasound findings. Sonographic soft markers such as increased nuchal translucency, increased nuchal fold thickness appeared in 3 cases and all of these were associated with other anomalies. However, none of the ultrasound findings differentiated ES from other genetic syndromes during fetal period. CONCLUSIONS In this series, in fetuses with a der(22), the derivative chromosome was consistently of maternal origin. In contrast, 46,t(11;22) balanced translocations were of maternal or paternal origin. The results contribute to the literature regarding the fetal phenotype of ES. Due to the absence of specific features distinguishing ES from other genetic syndromes, confirming the diagnosis through invasive genetic testing is necessary. This article is protected by copyright. All rights reserved.
Collapse
Affiliation(s)
- Xiulan Hao
- Department of Obstetrics and Gynecology, The Seventh Affiliated Hospital, Sun Yat-sen University, Shenzhen, China
| | - Jianzhu Wu
- Fetal Medicine Center, Department of Obstetrics and Gynecology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Wenting Fu
- NHC Key laboratory of Male Reproduction and Genetic, Guangdong Provincial Reproductive Science Institute, Guangzhou, China
| | - Rui Zhang
- Division of Maternal-Fetal Medicine, Jinan University-affiliated Shenzhen Baoan Women's and Children's Hospital, Shenzhen, China
| | - Shilin Zhong
- Prenatal Diagnosis Center, Department of Obstetrics and Gynecology, Peking University Shenzhen Hospital, Shenzhen, China
| | - Yuqing Deng
- Prenatal Diagnosis Center, Department of Obstetrics and Gynecology, Peking University Shenzhen Hospital, Shenzhen, China
| | - Yunxiao Zhu
- Department of Ultrasonic Medicine, The Seventh Affiliated Hospital, Sun Yat-sen University, Shenzhen, China
| | - Yanchou Ye
- Department of Obstetrics and Gynecology, The Seventh Affiliated Hospital, Sun Yat-sen University, Shenzhen, China
| | - Qun Fang
- Department of Obstetrics and Gynecology, The Seventh Affiliated Hospital, Sun Yat-sen University, Shenzhen, China.,Fetal Medicine Center, Department of Obstetrics and Gynecology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| |
Collapse
|
3
|
Luo Y, Lin J, Sun Y, Qian Y, Wang L, Chen M, Dong M, Jin F. Non-invasive prenatal screening for Emanuel syndrome. Mol Cytogenet 2020; 13:9. [PMID: 32158503 PMCID: PMC7057502 DOI: 10.1186/s13039-020-0476-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2019] [Accepted: 02/07/2020] [Indexed: 12/27/2022] Open
Abstract
Objective The aim of this study was to validate the results of two Emanuel syndromes detected by non-invasive prenatal screening (NIPS) screening using invasive methods, providing clinical performance of NIPS on chromosome microduplication detection. Methods NIPS was performed to diagnose the Emanuel syndrome. Amniocentesis or cordocentesis was performed to confirm the positive screening result of Emanuel syndrome cases. Fetal sample was detected by karyotyping, fluorescence in situ hybridization (FISH), and single nucleotide polymorphism array (SNP Array). Parental karyotyping and FISH were also carried out. Results Two cases with chromosomal abnormalities of 11q23.3q25 and 22q11.1q11.21 were found by NIPS. Chromosomal karyotyping showed that the two fetuses each have a small supernumerary marker chromosome (sSMC), SNP Array further demonstrated double duplications approximately 18 Mb in 11q23.3q25 and 3 Mb in 22q11.1q11.21. FISH confirmed that the small supernumerary marker chromosome (sSMC) was ish der(22)t(11;22) (TUPLE1+, ARSA-). Ultrasound scan and MRI showed some structure malformations in two fetuses. The two mothers were found to be a balanced carrier: 46,XX, t(11;22)(q23.3;q11.2). Conclusion NIPS could effectively identify Emanuel syndrome, which may indicate risks of a parent being a balanced rearrangement carrier. The followed confirmation test for positive sample is necessary and ensures the accuracy of the diagnosis.
Collapse
Affiliation(s)
- Yuqin Luo
- 1Department of Reproductive Genetics, Women's Hospital,School of Medicine, Zhejiang University, 1 Xueshi Road, Hangzhou, 310006 Zhejiang China.,2Ministry of Education, Key Laboratory of Reproductive Genetics (Zhejiang University), Hangzhou, People's Republic of China
| | - Jie Lin
- 2Ministry of Education, Key Laboratory of Reproductive Genetics (Zhejiang University), Hangzhou, People's Republic of China
| | - Yixi Sun
- 1Department of Reproductive Genetics, Women's Hospital,School of Medicine, Zhejiang University, 1 Xueshi Road, Hangzhou, 310006 Zhejiang China.,2Ministry of Education, Key Laboratory of Reproductive Genetics (Zhejiang University), Hangzhou, People's Republic of China
| | - Yeqing Qian
- 1Department of Reproductive Genetics, Women's Hospital,School of Medicine, Zhejiang University, 1 Xueshi Road, Hangzhou, 310006 Zhejiang China.,2Ministry of Education, Key Laboratory of Reproductive Genetics (Zhejiang University), Hangzhou, People's Republic of China
| | - Liya Wang
- 1Department of Reproductive Genetics, Women's Hospital,School of Medicine, Zhejiang University, 1 Xueshi Road, Hangzhou, 310006 Zhejiang China.,2Ministry of Education, Key Laboratory of Reproductive Genetics (Zhejiang University), Hangzhou, People's Republic of China
| | - Min Chen
- 1Department of Reproductive Genetics, Women's Hospital,School of Medicine, Zhejiang University, 1 Xueshi Road, Hangzhou, 310006 Zhejiang China.,2Ministry of Education, Key Laboratory of Reproductive Genetics (Zhejiang University), Hangzhou, People's Republic of China
| | - Minyue Dong
- 1Department of Reproductive Genetics, Women's Hospital,School of Medicine, Zhejiang University, 1 Xueshi Road, Hangzhou, 310006 Zhejiang China.,2Ministry of Education, Key Laboratory of Reproductive Genetics (Zhejiang University), Hangzhou, People's Republic of China
| | - Fan Jin
- 1Department of Reproductive Genetics, Women's Hospital,School of Medicine, Zhejiang University, 1 Xueshi Road, Hangzhou, 310006 Zhejiang China.,2Ministry of Education, Key Laboratory of Reproductive Genetics (Zhejiang University), Hangzhou, People's Republic of China.,3Centre of Reproductive Medicine, Women's Hospital, Zhejiang University School of Medicine, Hangzhou, China
| |
Collapse
|