PMID- 34365622 OWN - NLM STAT- MEDLINE DCOM- 20210810 LR - 20220531 IS - 1003-9406 (Print) IS - 1003-9406 (Linking) VI - 38 IP - 8 DP - 2021 Aug 10 TI - [Prenatal cytogenetic and molecular genetic analysis of a fetus with confined placenta mosaicism for trisomy 16]. PG - 771-774 LID - 10.3760/cma.j.cn511374-20200609-00425 [doi] AB - OBJECTIVE: To review the clinical data of a fetus with false positive result of non-invasive prenatal testing (NIPT) due to confined placental mosaicism (CPM). METHODS: Amniotic fluid sample was taken from a pregnant women with high risk for chromosome 16 aneuploidy for karyotyping analysis, single nucleotide polymorphism array (SNP array) and interphase fluorescence in situ hybridization (FISH). Genetic testing was also conducted on the fetal and maternal surface of the placenta, root of umbilical cord and fetal skin tissue after induced abortion. RESULTS: Cytogenetic analysis of the amniotic fluid sample yielded a normal karyotype. SNP array revealed mosaicism (20%) of trisomy 16 in the fetus. FISH confirmed the presence of mosaicism (25%) for trisomy 16. After induced labor, all sampled sites of placenta were confirmed to contain trisomy 16 by SNP array, while the analysis of fetal skin tissue yielded a negative result. CONCLUSION: CPM is an important factor for false positive NIPT result. Prenatal identification of CPM and strengthened pregnancy management are important to reduce adverse pregnancy outcomes. FAU - Jiao, Zhihui AU - Jiao Z AD - Genetics and Prenatal Diagnosis Center, Department of Obstetrics and Gynecology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, China. kongxd@263.net. FAU - Zhu, Chaofeng AU - Zhu C FAU - Hou, Yaqin AU - Hou Y FAU - Wang, Li AU - Wang L FAU - Kong, Xiangdong AU - Kong X LA - chi PT - Case Reports PT - Journal Article PL - China TA - Zhonghua Yi Xue Yi Chuan Xue Za Zhi JT - Zhonghua yi xue yi chuan xue za zhi = Zhonghua yixue yichuanxue zazhi = Chinese journal of medical genetics JID - 9425197 RN - Chromosome 16, trisomy SB - IM MH - Amniocentesis MH - *Chromosomes, Human, Pair 16/genetics MH - Cytogenetic Analysis MH - Female MH - Fetus MH - Humans MH - In Situ Hybridization, Fluorescence MH - Molecular Biology MH - *Mosaicism MH - Placenta MH - Pregnancy MH - Prenatal Diagnosis MH - Trisomy/genetics EDAT- 2021/08/09 06:00 MHDA- 2021/08/11 06:00 CRDT- 2021/08/08 21:04 PHST- 2021/08/08 21:04 [entrez] PHST- 2021/08/09 06:00 [pubmed] PHST- 2021/08/11 06:00 [medline] AID - 940638160 [pii] AID - 10.3760/cma.j.cn511374-20200609-00425 [doi] PST - ppublish SO - Zhonghua Yi Xue Yi Chuan Xue Za Zhi. 2021 Aug 10;38(8):771-774. doi: 10.3760/cma.j.cn511374-20200609-00425.