PMID- 32071615 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20220412 IS - 1755-8166 (Print) IS - 1755-8166 (Electronic) IS - 1755-8166 (Linking) VI - 13 DP - 2020 TI - Prenatal genetic analysis and differential pregnancy outcomes of two de novo cases showing mosaic isodicentric Y chromosome. PG - 7 LID - 10.1186/s13039-020-0472-y [doi] LID - 7 AB - BACKGROUND: Fetal cells collected from the amniotic fluid of two pregnant women indicated sex chromosome abnormalities. Therefore, we performed G-banded chromosome karyotype analysis, single nucleotide polymorphism array (SNP array), fluorescence in situ hybridization (FISH), and sequence-tagged sites (STS) analysis of the Y chromosome to determine the rare molecular genetics of the two fetuses. CASE PRESENTATION: The karyotypes of the fetuses from patients 1 and 2 were mos 45,X[92]/46,X,+idic(Y)(q11.21)[8] and mos 45,X[20]/46,X,+idic(Y)(q11.223)[80], respectively. Fetus 1 had a 7.76 Mb deletion in Yq11.222q11.23 and a 15.68 Mb duplication in Yp11.2q11.21. Fetus 2 had 21 Mb of repetitive segments in Yp11.3q11.223. Azoospermia factor (AZF) detection by STS analysis revealed a missing AZFb+c region in fetus 1 and three functional AZF regions in fetus 2. The isodicentric Y chromosome (idic (Y)) in both fetuses arose de novo. The pregnancy of patient 1 was terminated, whereas the fetus of patient 2 was delivered and is now 10 months old with normal appearance and growth. CONCLUSION: A combination of technologies such as chromosome karyotyping, FISH, SNP arrays, and STS analysis of the Y chromosome is important in prenatal diagnosis to reduce birth defect rates and improve the health of the Chinese population. CI - (c) The Author(s). 2020. FAU - He, Si AU - He S AD - The prenatal diagnosis center of Hunan Province, The Maternal and Child Health Hospital of Hunan Province, 53 Xiangchun Road, Kaifu District, Changsha City, Hunan Province China. FAU - Xi, Hui AU - Xi H AD - The prenatal diagnosis center of Hunan Province, The Maternal and Child Health Hospital of Hunan Province, 53 Xiangchun Road, Kaifu District, Changsha City, Hunan Province China. FAU - Chen, Jing AU - Chen J AD - The prenatal diagnosis center of Hunan Province, The Maternal and Child Health Hospital of Hunan Province, 53 Xiangchun Road, Kaifu District, Changsha City, Hunan Province China. FAU - Wang, Dan AU - Wang D AD - The prenatal diagnosis center of Hunan Province, The Maternal and Child Health Hospital of Hunan Province, 53 Xiangchun Road, Kaifu District, Changsha City, Hunan Province China. FAU - Pang, Jialun AU - Pang J AD - The prenatal diagnosis center of Hunan Province, The Maternal and Child Health Hospital of Hunan Province, 53 Xiangchun Road, Kaifu District, Changsha City, Hunan Province China. FAU - Hu, Jiancheng AU - Hu J AD - The prenatal diagnosis center of Hunan Province, The Maternal and Child Health Hospital of Hunan Province, 53 Xiangchun Road, Kaifu District, Changsha City, Hunan Province China. FAU - Liu, Qin AU - Liu Q AD - The prenatal diagnosis center of Hunan Province, The Maternal and Child Health Hospital of Hunan Province, 53 Xiangchun Road, Kaifu District, Changsha City, Hunan Province China. FAU - Jia, Zhengjun AU - Jia Z AD - The prenatal diagnosis center of Hunan Province, The Maternal and Child Health Hospital of Hunan Province, 53 Xiangchun Road, Kaifu District, Changsha City, Hunan Province China. FAU - Wang, Hua AU - Wang H AD - The prenatal diagnosis center of Hunan Province, The Maternal and Child Health Hospital of Hunan Province, 53 Xiangchun Road, Kaifu District, Changsha City, Hunan Province China. LA - eng PT - Case Reports DEP - 20200211 PL - England TA - Mol Cytogenet JT - Molecular cytogenetics JID - 101317942 PMC - PMC7014639 OTO - NOTNLM OT - AZF gene OT - Isodicentric Y OT - SNP array COIS- Competing interestsThe authors declare that they have no competing interests. EDAT- 2020/02/20 06:00 MHDA- 2020/02/20 06:01 PMCR- 2020/02/11 CRDT- 2020/02/20 06:00 PHST- 2019/11/11 00:00 [received] PHST- 2020/01/15 00:00 [accepted] PHST- 2020/02/20 06:00 [entrez] PHST- 2020/02/20 06:00 [pubmed] PHST- 2020/02/20 06:01 [medline] PHST- 2020/02/11 00:00 [pmc-release] AID - 472 [pii] AID - 10.1186/s13039-020-0472-y [doi] PST - epublish SO - Mol Cytogenet. 2020 Feb 11;13:7. doi: 10.1186/s13039-020-0472-y. eCollection 2020.