Rapid aneuploidy diagnosis of partial trisomy 7q (7q34->qter) and partial monosomy 10q (10q26.12->qter) by array comparative genomic hybridization using uncultured amniocytes

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Title:	Rapid aneuploidy diagnosis of partial trisomy 7q (7q34->qter) and partial monosomy 10q (10q26.12->qter) by array comparative genomic hybridization using uncultured amniocytes
Authors:	陳持平;Chen, Chih-Ping
Contributors:	生物科技學系
Keywords:	chromosome 7 duplication;chromosome 10 deletion;monosomy 10q;rapid aneuploidy diagnosis;trisomy 7q;uncultured amniocytes
Date:	2012-03
Issue Date:	2012-11-23 09:17:36 (UTC+0)
Abstract:	"Objective To present rapid aneuploidy diagnosis (RAD) of partial trisomy 7q (7q34→qter) and partial monosomy 10q (10q26.12→qter) by array comparative genomic hybridization (aCGH) using uncultured amniocytes. Case Report A 34-year-old, gravida 2, para 1, woman underwent amniocentesis at 20 weeks of gestation because of a previous mentally retarded child with an unbalanced reciprocal translocation inherited from the carrier father who had a karyotype of 46,XY,t(7;10) (q34;q26.12). Her first child was initially found to have a normal karyotype by routine cytogenetic analysis, but a cryptic chromosomal abnormality was subsequently diagnosed by aCGH. During this pregnancy, RAD by oligonucleotide-based aCGH using uncultured amniocytes revealed a 16.4-Mb duplication of 7q34–q36.3 and a 12.7-Mb deletion of 10q26.12–q26.3. Conventional cytogenetic analysis using cultured amniocytes revealed a karyotype of 46,XX,der(10)t(7;10)(q34;q26.12)pat. The parents elected to terminate the pregnancy. A malformed female fetus was delivered with a high prominent forehead, hypertelorism, epicanthic folds, a broad depressed nasal bridge, a prominent nose with anteverted nostrils, micrognathia, a short neck, large low-set ears, clinodactyly, small big toes, and normal female external genitalia. Conclusion aCGH is a useful tool for RAD of subtle chromosomal rearrangements in pregnancy, especially under the circumstance of a previous abnormal child with an unbalanced translocation derived from a parental subtle reciprocal translocation."
Relation:	Taiwanese Journal of Obstetrics & Gynecology
Appears in Collections:	[Department of Biotechnology] Journal Article

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