title: Prenatal diagnosis of sub-microscopic partial trisomy 10q using chromosomal microarray analysis in a phenotypically abnormal fetus with normal karyotype.
abstract: Partial trisomy of the 10q region was originally reported in 1979 [1]. For 25 years, the diagnosis was made microscopically based on large, visible insertions in the region identified by karyotype analysis. Previous case reports have included both unbalanced translocations and large duplications/insertions in the 10q region [2]. Probands with partial trisomy 10q syndrome often have an abnormal phenotype that may include developmental delay [3-5], craniofacial abnormalities [3, 5], talipes (clubfoot) [2], microcephaly [2-4], or congenital heart disease [2-6]. Prenatal diagnoses by karyotype have been made following ultrasound diagnosis of sacrococcygeal teratoma [7], renal pyelectasis [3, 8-10], and other fetal abnormalities [4]. In this case, we report the first prenatal diagnosis of partial trisomy 10q (10q22.3-10q23.2) with a normal karyotype and an abnormal chromosomal microarray analysis (CMA). This is the smallest copy number variant (CNV) (7.5 Mb) in the 10q22.3-10q23.2 regions yet reported.
authors.affiliation: Georgia Regents University School of Medicine, Department of Obstetrics and Gynecology, Macon, GA, USA and NavicentHealth, Medical Center of Centeral Georgia (MCCG), Mercer University, Department of Obstetrics and Gynecology, Macon, GA, USA.
authors.forename: P C
authors.initials: PC
authors.lastname: Browne
authors.affiliation: Georgia Regents University School of Medicine, Department of Obstetrics and Gynecology, Macon, GA, USA and NavicentHealth, Medical Center of Centeral Georgia (MCCG), Mercer University, Department of Obstetrics and Gynecology, Macon, GA, USA.
authors.forename: S
authors.initials: S
authors.lastname: Adam
authors.affiliation: Georgia Regents University School of Medicine, Department of Obstetrics and Gynecology, Macon, GA, USA and NavicentHealth, Medical Center of Centeral Georgia (MCCG), Mercer University, Department of Obstetrics and Gynecology, Macon, GA, USA.
authors.forename: M
authors.initials: M
authors.lastname: Badr
authors.affiliation: Department of Medical Genetics, University of South Carolina, SC, USA.
authors.forename: C R
authors.initials: CR
authors.lastname: Brooks
authors.affiliation: Department of Medical Genetics, University of South Carolina, SC, USA.
authors.forename: J
authors.initials: J
authors.lastname: Edwards
authors.affiliation: Department of Medical Genetics, University of South Carolina, SC, USA.
authors.forename: P
authors.initials: P
authors.lastname: Walker
authors.affiliation: Department of Obstetrics and Gynecology, Manousa University, Egypt.
authors.forename: S
authors.initials: S
authors.lastname: Mohamed
authors.affiliation: Department of Obstetrics and Gynecology, University of Florida, Gainesville, FL, USA.
authors.forename: A R
authors.initials: AR
authors.lastname: Gregg
mesh_terms: D000015:Abnormalities, Multiple / Q000175:diagnosis* / Q000235:genetics; D000028:Abortion, Induced; D000328:Adult; D025063:Chromosome Disorders / Q000175:diagnosis* / Q000235:genetics; D002879:Chromosomes, Human, Pair 10 / Q000235:genetics; D005260:Female; D005315:Fetal Diseases / Q000175:diagnosis* / Q000235:genetics; D005817:Genetic Counseling; D006801:Humans; D059785:Karyotype; D007621:Karyotyping; D046228:Microarray Analysis / Q000379:methods*; D011247:Pregnancy; D011296:Prenatal Diagnosis; D014314:Trisomy / Q000175:diagnosis* / Q000235:genetics
keywords: Cranio-facial anomalies; Partial trisomy 10q chromosome; microarray; microcephaly; pyelectasis