PMID- 28420516 OWN - NLM STAT- MEDLINE DCOM- 20171120 LR - 20171128 IS - 1875-6263 (Electronic) IS - 1028-4559 (Linking) VI - 56 IP - 2 DP - 2017 Apr TI - Prenatal diagnosis and molecular cytogenetic characterization of low-level mosaic trisomy 12 at amniocentesis associated with a favorable pregnancy outcome. PG - 238-242 LID - S1028-4559(17)30022-0 [pii] LID - 10.1016/j.tjog.2017.01.005 [doi] AB - OBJECTIVE: We present prenatal diagnosis of low-level mosaic trisomy 12. CASE REPORT: A 40-year-old woman underwent amniocentesis at 18 weeks of gestation because of advanced maternal age, which revealed a karyotype of 47,XX,+12[5]/46,XX[24] consistent with 17.2% (5/29) mosaicism for trisomy 12. Repeat amniocentesis performed at 21 weeks of gestation revealed a karyotype of 47,XX,+12[4]/46,XX[6] consistent with 40% (4/10) mosaicism for trisomy 12. Interphase fluorescence in situ hybridization (FISH) on 112 uncultured amniocytes detected 23 cells with trisomy 12 consistent with 20.5% (23/112) mosaicism for trisomy 12. Polymorphic DNA marker analysis excluded uniparental disomy 12. Array comparative genomic hybridization (aCGH) on uncultured amniocytes revealed a result of arr 12p13.33q24.33 (230,451-133,773,499) x 2.2, 17p12 (14,191,925-15,442,037) x 1.0 consistent with 10-20% mosaic trisomy 12. The father carried the 17p12 microdeletion. The fetal ultrasound findings were unremarkable. A 3958-g female fetus was delivered at 37 weeks of gestation with no phenotypic abnormality. The cord blood had a karyotype of 46,XX. Postnatal interphase FISH on urinary cells revealed 7.14% (7/98) mosaicism for trisomy 12. CONCLUSION: Low-level mosaic trisomy 12 at amniocentesis can be associated with a favorable pregnancy outcome. Interphase FISH and aCGH on uncultured amniocytes are useful for confirmation of low-level mosaic trisomy 12 at amniocentesis. CI - Copyright (c) 2017. 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; Department of Biotechnology, Asia University, Taichung, 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 - Lin, Chen-Ju AU - Lin CJ AD - Department of Obstetrics and Gynecology, MacKay Memorial Hospital, Taipei, Taiwan; Department of Medicine, MacKay Medical College, New Taipei City, Taiwan. FAU - Chern, Schu-Rern AU - Chern SR AD - Department of Medical Research, MacKay Memorial Hospital, Taipei, Taiwan. FAU - Wu, Peih-Shan AU - Wu PS AD - Gene Biodesign Co. Ltd., Taipei, Taiwan. FAU - Chen, Yen-Ni AU - Chen YN AD - Department of Obstetrics and Gynecology, MacKay Memorial Hospital, Taipei, Taiwan. FAU - Chen, Shin-Wen AU - Chen SW AD - Department of Obstetrics and Gynecology, MacKay Memorial Hospital, Taipei, Taiwan. FAU - Pan, Chen-Wen AU - Pan CW AD - Department of Obstetrics and Gynecology, MacKay Memorial Hospital, Taipei, Taiwan. FAU - Yang, Chien-Wen AU - Yang CW AD - Department of Medical Research, MacKay Memorial Hospital, Taipei, Taiwan. FAU - Wang, Wayseen AU - Wang W AD - Department of Medical Research, MacKay Memorial Hospital, Taipei, Taiwan; Department of Bioengineering, Tatung University, Taipei, Taiwan. LA - eng PT - Case Reports PT - Journal Article PL - China (Republic : 1949- ) TA - Taiwan J Obstet Gynecol JT - Taiwanese journal of obstetrics & gynecology JID - 101213819 SB - IM MH - Adult MH - Amniocentesis MH - *Chromosome Deletion MH - *Chromosomes, Human, Pair 12 MH - *Chromosomes, Human, Pair 17 MH - Comparative Genomic Hybridization MH - Female MH - Humans MH - In Situ Hybridization, Fluorescence MH - Karyotype MH - Male MH - *Mosaicism MH - Phenotype MH - Pregnancy MH - Pregnancy Outcome MH - Prenatal Diagnosis MH - *Trisomy OTO - NOTNLM OT - amniocentesis OT - mosaic trisomy 12 OT - prenatal diagnosis OT - trisomy 12 mosaicism EDAT- 2017/04/20 06:00 MHDA- 2017/11/29 06:00 CRDT- 2017/04/20 06:00 PHST- 2017/01/12 00:00 [accepted] PHST- 2017/04/20 06:00 [entrez] PHST- 2017/04/20 06:00 [pubmed] PHST- 2017/11/29 06:00 [medline] AID - S1028-4559(17)30022-0 [pii] AID - 10.1016/j.tjog.2017.01.005 [doi] PST - ppublish SO - Taiwan J Obstet Gynecol. 2017 Apr;56(2):238-242. doi: 10.1016/j.tjog.2017.01.005.