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  • Title: Molecular cytogenetic characterization of inv dup del(8p) in a fetus associated with ventriculomegaly, hypoplastic left heart, polyhydramnios and intestinal obstruction.
    Author: Chen CP, Ko TM, Huang WC, Chern SR, Wu PS, Chen YN, Chen SW, Lee CC, Pan CW, Yang CW, Wang W.
    Journal: Taiwan J Obstet Gynecol; 2016 Jun; 55(3):415-8. PubMed ID: 27343326.
    Abstract:
    OBJECTIVE: To present molecular cytogenetic characterization of inv dup del(8p) in a fetus with congenital malformations. MATERIALS AND METHODS: A 19-year-old, primigravid woman underwent cord blood sampling at 31 weeks of gestation because of prenatal ultrasound findings of polyhydramnios, intestinal obstruction, right ventriculomegaly, and hypoplastic left heart. Preterm precipitous labor and delivery occurred at 32 weeks of gestation. Array comparative genomic hybridization (aCGH), conventional cytogenetic analysis and metaphase fluorescence in situ hybridization (FISH) were applied on cord blood lymphocytes. aCGH was also applied on the umbilical cord. Conventional cytogenetic analysis was applied on parental bloods. RESULTS: aCGH detected an 11.35 Mb deletion in 8p23.3-p23.1 encompassing SOX7 and GATA4, and a 31.99 Mb duplication in 8p23.1-p11.1 in the fetus. Metaphase FISH confirmed inv dup del(8p). The fetus had a karyotype of 46,XX,der(8)del(8)(p23.1) inv dup(8) (p11.1p23.1). Parental karyotypes were normal. A malformed fetus was delivered with facial dysmorphism. CONCLUSION: Fetuses with inv dup del(8p) may present central nervous system (CNS) abnormality and congenital heart defect on prenatal ultrasound. Prenatal diagnosis of concomitant CNS and cardiac abnormalities should include a differential diagnosis of chromosome 8p inverted duplication deletion syndrome.
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