PMID- 33218415 OWN - NLM STAT- MEDLINE DCOM- 20210726 LR - 20210726 IS - 1875-6263 (Electronic) IS - 1028-4559 (Linking) VI - 59 IP - 6 DP - 2020 Nov TI - Low-level mosaic trisomy 13 at amniocentesis associated with a favorable outcome in a pregnancy. PG - 935-937 LID - S1028-4559(20)30233-3 [pii] LID - 10.1016/j.tjog.2020.09.022 [doi] AB - OBJECTIVE: We present low-level mosaic trisomy 13 at amniocentesis associated with a favorable outcome in a pregnancy. CASE REPORT: A 39-year-old woman underwent amniocentesis at 17 weeks of gestation because of advanced maternal age. Amniocentesis revealed a karyotype of 47,XY,+13[8]/46,XY[20]. The woman underwent cord blood sampling at 22 weeks of gestation. Cytogenetic analysis of cord blood revealed a karyotype of 47,XY,+13[2]/46,XY[98]. Array comparative genomic hybridization (aCGH) analysis on the DNA extracted from cord blood revealed 10% gene dosage increase in chromosome 13. Prenatal ultrasound findings were unremarkable. After genetic counseling, the parents decided to continue the pregnancy, and a 2,280-g healthy male baby was delivered at 38 weeks of gestation. The parental karyotypes were normal. The cord blood at birth had a karyotype of 47,XY,+13[1]/46,XY[49]. At age one month, interphase fluorescence in situ hybridization (FISH) analysis revealed no trisomy 13 signals in 100/100 buccal mucosal cells, and trisomy 13 signals in 2/54 (3.7%) urinary cells compared with 0/60 cells in the normal control. The neonate was doing well and presented neither phenotypic abnormalities nor psychomotor disorders at age two months. CONCLUSION: Low-level true mosaic trisomy 13 at amniocentesis without ultrasound abnormalities can be associated with a favorable outcome. CI - Copyright (c) 2020. Published by Elsevier B.V. FAU - Chen, Chih-Ping AU - Chen CP AD - Department of Obstetrics and Gynecology, MacKay Memorial Hospital, Taipei, Taiwan; Department of Medical Research, MacKay Memorial Hospital, Taipei, Taiwan; School of Chinese Medicine, College of Chinese Medicine, China Medical University, Taichung, Taiwan; Institute of Clinical and Community Health Nursing, National Yang-Ming University, Taipei, Taiwan; Department of Obstetrics and Gynecology, School of Medicine, National Yang-Ming University, Taipei, Taiwan. Electronic address: cpc_mmh@yahoo.com. FAU - Chern, Schu-Rern AU - Chern SR AD - Department of Medical Research, MacKay Memorial Hospital, Taipei, Taiwan. FAU - Wu, Fang-Tzu AU - Wu FT AD - Department of Obstetrics and Gynecology, MacKay Memorial Hospital, Taipei, Taiwan. FAU - Chen, Yun-Yi AU - Chen YY AD - Department of Medical Research, MacKay Memorial Hospital, Taipei, Taiwan. FAU - Lee, Meng-Shan AU - Lee MS AD - Department of Obstetrics and Gynecology, MacKay Memorial Hospital, Taipei, Taiwan. FAU - Wang, Wayseen AU - Wang W AD - Department of Medical Research, MacKay Memorial Hospital, Taipei, Taiwan. LA - eng PT - Case Reports PL - China (Republic : 1949- ) TA - Taiwan J Obstet Gynecol JT - Taiwanese journal of obstetrics & gynecology JID - 101213819 SB - IM MH - Adult MH - Amniocentesis MH - Comparative Genomic Hybridization MH - Cytogenetic Analysis MH - Female MH - Fetal Blood/metabolism MH - Humans MH - In Situ Hybridization, Fluorescence MH - Infant MH - Infant, Newborn MH - Karyotyping MH - Live Birth/*genetics MH - Male MH - Pregnancy MH - Trisomy 13 Syndrome/*diagnosis/embryology OTO - NOTNLM OT - Amniocentesis OT - Mosaicism OT - Trisomy 13 COIS- Declaration of competing interest The authors have no conflicts of interest relevant to this article. EDAT- 2020/11/22 06:00 MHDA- 2021/07/27 06:00 CRDT- 2020/11/21 05:24 PHST- 2020/08/28 00:00 [accepted] PHST- 2020/11/21 05:24 [entrez] PHST- 2020/11/22 06:00 [pubmed] PHST- 2021/07/27 06:00 [medline] AID - S1028-4559(20)30233-3 [pii] AID - 10.1016/j.tjog.2020.09.022 [doi] PST - ppublish SO - Taiwan J Obstet Gynecol. 2020 Nov;59(6):935-937. doi: 10.1016/j.tjog.2020.09.022.