{"title":"Chromosomal Mosaicism in the Placenta.","authors":"Caitlin Baptiste, Francesca R Grati, Brynn Levy","doi":"10.1097/GRF.0000000000000906","DOIUrl":null,"url":null,"abstract":"<p><p>The clinical implications of placental chromosomal mosaicism can be challenging for patients and health care providers. Key considerations include the specific characteristics of the chromosomal abnormality (such as size, gene content, and copy number), the timing of the mosaicism's onset during embryogenesis or fetal development, the types of tissues involved, and the level of mosaicism (the ratio of normal to abnormal cells within those tissues). Genetic counseling can help inform patients about the chances of having a live-born child with a chromosomal abnormality. Each case requires individual assessment to provide accurate guidance. This chapter will explore the clinical implications of detecting mosaicism at 3 critical diagnostic stages: (1) chorionic villus sampling (CVS); (2) amniocentesis; and (3) cell-free DNA (cfDNA) testing.</p>","PeriodicalId":10415,"journal":{"name":"Clinical obstetrics and gynecology","volume":" ","pages":"130-138"},"PeriodicalIF":1.4000,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Clinical obstetrics and gynecology","FirstCategoryId":"3","ListUrlMain":"https://doi.org/10.1097/GRF.0000000000000906","RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2024/12/23 0:00:00","PubModel":"Epub","JCR":"Q3","JCRName":"OBSTETRICS & GYNECOLOGY","Score":null,"Total":0}
引用次数: 0
Abstract
The clinical implications of placental chromosomal mosaicism can be challenging for patients and health care providers. Key considerations include the specific characteristics of the chromosomal abnormality (such as size, gene content, and copy number), the timing of the mosaicism's onset during embryogenesis or fetal development, the types of tissues involved, and the level of mosaicism (the ratio of normal to abnormal cells within those tissues). Genetic counseling can help inform patients about the chances of having a live-born child with a chromosomal abnormality. Each case requires individual assessment to provide accurate guidance. This chapter will explore the clinical implications of detecting mosaicism at 3 critical diagnostic stages: (1) chorionic villus sampling (CVS); (2) amniocentesis; and (3) cell-free DNA (cfDNA) testing.
期刊介绍：
Each issue of Clinical Obstetrics and Gynecology is a complete symposium on one or two timely topics of interest in obstetrics and gynecology. For each quarterly issue, two prominent guest editors solicit contributions on key clinical topics of interest to practicing physicians. Procedures, current clinical problems, medical and surgical treatments, and effective diagnostic aids are all carefully reviewed in original articles. The result is an instructive resource that dispenses trustworthy clinical guidance that enhances your understanding of key areas of your practice.
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