PMID- 34365625 OWN - NLM STAT- MEDLINE DCOM- 20210810 LR - 20210810 IS - 1003-9406 (Print) IS - 1003-9406 (Linking) VI - 38 IP - 8 DP - 2021 Aug 10 TI - [Prenatal diagnosis of a rare case with de novo partial 21q(21q22.1--> qter) trisomy syndrome and absent nasal bone]. PG - 783-786 LID - 10.3760/cma.j.cn511374-20200814-00601 [doi] AB - OBJECTIVE: To carry out prenatal diagnosis for a fetus with absent nasal bone by using cytogenetic and molecular techniques. METHODS: Chromosomal karyotyping, single nucleotide polymorphism array (SNP-array) and fluorescence in situ hybridization (FISH) assays were applied for the diagnoses. Peripheral blood samples were also taken from the parents for chromosomal karyotyping and FISH analysis. RESULTS: The fetus was found to have a 46,XX,add(21)(p11.2) karyotype, and SNP-array has revealed a 11.3 Mb duplication at 21q22.12q22.3 (hg19: 36 762 648-48 093 361), which was confirmed by FISH. Both parents were found to be normal by chromosomal karyotyping and FISH analysis. The fetus was ultimately found to have a karyotype of 46,XX,der(21)t(21;21)(p11.2;q22.1), resulting a de novo partial trisomy of 21q22.1. CONCLUSION: Combined use of various techniques has enabled accurate prenatal diagnosis and genetic counseling for the fetus. FAU - Chen, Jiayan AU - Chen J AD - Center for Prenatal Diagnosis, Xiamen Maternity and Child Health Care Hospital, Xiamen, Fujian 361003, China. gshee@163.com. FAU - Sheng, Nan AU - Sheng N FAU - Cai, Meijiao AU - Cai M FAU - Ge, Yunsheng AU - Ge Y 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 SB - IM MH - Female MH - Humans MH - In Situ Hybridization, Fluorescence MH - Karyotyping MH - *Nasal Bone 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 - 940638163 [pii] AID - 10.3760/cma.j.cn511374-20200814-00601 [doi] PST - ppublish SO - Zhonghua Yi Xue Yi Chuan Xue Za Zhi. 2021 Aug 10;38(8):783-786. doi: 10.3760/cma.j.cn511374-20200814-00601.