Clinical value of genetic analysis in prenatal diagnosis of short femur
Abstract Background Fetal femur length (FL) is an important biometric index in prenatal screening. The etiology of short femur is diverse, with some pathogenic causes leading to adverse outcomes. To improve the accuracy and practicability of diagnosis, we investigated the value of genetic analysis i...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2019-11-01
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| Series: | Molecular Genetics & Genomic Medicine |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/mgg3.978 |
| _version_ | 1797296154651656192 |
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| author | Jialiu Liu Linhuan Huang Zhiming He Shaobin Lin Ye Wang Yanmin Luo |
| author_facet | Jialiu Liu Linhuan Huang Zhiming He Shaobin Lin Ye Wang Yanmin Luo |
| author_sort | Jialiu Liu |
| collection | DOAJ |
| description | Abstract Background Fetal femur length (FL) is an important biometric index in prenatal screening. The etiology of short femur is diverse, with some pathogenic causes leading to adverse outcomes. To improve the accuracy and practicability of diagnosis, we investigated the value of genetic analysis in prenatal diagnosis of short femur. Methods We examined chromosomal microarray analysis (CMA) (64 fetuses) and karyotyping (59 fetuses) data retrospectively for short femur without fetal growth restriction (FGR). Genetic testing was conducted for 15 fetuses. Results Karyotyping and CMA detected chromosomal aberrations at rates of 13.6% and 27.2%, respectively. Among fetuses with other abnormalities, detection rates were 21.0% higher with CMA than karyotyping. CMA identified chromosomal abnormalities in 36.4% of cases with a FL 2–4 standard deviations (SDs) below the gestational age (GA) mean. Abnormality detection by CMA reached 38.5% in the second trimester. Duplication of 12p, 16p13.1 deletion, and uniparental disomy 16 were identified by CMA in three cases of short femur. Gene sequencing detected clinically notable mutations in 12/15 fetuses, among which 9/12 fetuses had FLs >4 SDs below the GA mean. Conclusions CMA yielded a higher detection value than karyotyping in fetuses with other abnormalities or a FL 2–4 SDs below the GA mean during the second trimester. Gene sequencing should be performed when FL is >4 SDs below the mean. |
| first_indexed | 2024-03-07T21:59:17Z |
| format | Article |
| id | doaj.art-9d0e8565a437483fb858a6d698710eaa |
| institution | Directory Open Access Journal |
| issn | 2324-9269 |
| language | English |
| last_indexed | 2024-03-07T21:59:17Z |
| publishDate | 2019-11-01 |
| publisher | Wiley |
| record_format | Article |
| series | Molecular Genetics & Genomic Medicine |
| spelling | doaj.art-9d0e8565a437483fb858a6d698710eaa2024-02-24T07:01:11ZengWileyMolecular Genetics & Genomic Medicine2324-92692019-11-01711n/an/a10.1002/mgg3.978Clinical value of genetic analysis in prenatal diagnosis of short femurJialiu Liu0Linhuan Huang1Zhiming He2Shaobin Lin3Ye Wang4Yanmin Luo5Department of Obstetrics & Gynecology The First Affiliated Hospital of Sun Yat‐Sen University Guangzhou People's Republic of ChinaDepartment of Obstetrics & Gynecology The First Affiliated Hospital of Sun Yat‐Sen University Guangzhou People's Republic of ChinaDepartment of Obstetrics & Gynecology The First Affiliated Hospital of Sun Yat‐Sen University Guangzhou People's Republic of ChinaDepartment of Obstetrics & Gynecology The First Affiliated Hospital of Sun Yat‐Sen University Guangzhou People's Republic of ChinaDepartment of Obstetrics & Gynecology The First Affiliated Hospital of Sun Yat‐Sen University Guangzhou People's Republic of ChinaDepartment of Obstetrics & Gynecology The First Affiliated Hospital of Sun Yat‐Sen University Guangzhou People's Republic of ChinaAbstract Background Fetal femur length (FL) is an important biometric index in prenatal screening. The etiology of short femur is diverse, with some pathogenic causes leading to adverse outcomes. To improve the accuracy and practicability of diagnosis, we investigated the value of genetic analysis in prenatal diagnosis of short femur. Methods We examined chromosomal microarray analysis (CMA) (64 fetuses) and karyotyping (59 fetuses) data retrospectively for short femur without fetal growth restriction (FGR). Genetic testing was conducted for 15 fetuses. Results Karyotyping and CMA detected chromosomal aberrations at rates of 13.6% and 27.2%, respectively. Among fetuses with other abnormalities, detection rates were 21.0% higher with CMA than karyotyping. CMA identified chromosomal abnormalities in 36.4% of cases with a FL 2–4 standard deviations (SDs) below the gestational age (GA) mean. Abnormality detection by CMA reached 38.5% in the second trimester. Duplication of 12p, 16p13.1 deletion, and uniparental disomy 16 were identified by CMA in three cases of short femur. Gene sequencing detected clinically notable mutations in 12/15 fetuses, among which 9/12 fetuses had FLs >4 SDs below the GA mean. Conclusions CMA yielded a higher detection value than karyotyping in fetuses with other abnormalities or a FL 2–4 SDs below the GA mean during the second trimester. Gene sequencing should be performed when FL is >4 SDs below the mean.https://doi.org/10.1002/mgg3.978chromosome microarray analysisfetal femur lengthgene sequencingprenatal diagnosis |
| spellingShingle | Jialiu Liu Linhuan Huang Zhiming He Shaobin Lin Ye Wang Yanmin Luo Clinical value of genetic analysis in prenatal diagnosis of short femur Molecular Genetics & Genomic Medicine chromosome microarray analysis fetal femur length gene sequencing prenatal diagnosis |
| title | Clinical value of genetic analysis in prenatal diagnosis of short femur |
| title_full | Clinical value of genetic analysis in prenatal diagnosis of short femur |
| title_fullStr | Clinical value of genetic analysis in prenatal diagnosis of short femur |
| title_full_unstemmed | Clinical value of genetic analysis in prenatal diagnosis of short femur |
| title_short | Clinical value of genetic analysis in prenatal diagnosis of short femur |
| title_sort | clinical value of genetic analysis in prenatal diagnosis of short femur |
| topic | chromosome microarray analysis fetal femur length gene sequencing prenatal diagnosis |
| url | https://doi.org/10.1002/mgg3.978 |
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