prenatal diagnosis and genetic analysis of a fetus with 47,xx, +21/46,xx mosaicism and xx/xy chimerism
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ID: 212792
2006
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Abstract
Prenatal diagnosis of simultaneous occurrence of chimerism and autosomal mosaicism is extremely rare. We report the prenatal diagnosis and genetic analysis of a fetus in a twin pregnancy with mosaic 47,XX,+21/46,XX with chimeric XX/XY. A 36-year-old, para 1, woman was referred for genetic counseling at 20 weeks' gestation because of abnormal karyotype (47,XX,+21/46,XX) in one fetus in a twin pregnancy. Cordocentesis revealed 47,XX,+21[3]/46,XX[35]/46,XY[7] in this fetus. Postnatal cytogenetic analysis of cord blood confirmed three cell lines in this twin (A) and 46,XY in the co-twin (B). Postmortem pathologic findings of both fetuses were normal. Fluorescence in situ hybridization identified three cell lines in the cord blood of twin A. Molecular genetic analysis using polymorphic DNA markers revealed parental origin of fetal tissue, and confirmed the chimeric status. Molecular genetic analysis with polymorphic DNA markers help to differentiate chimerism from mosaicism and define the origin of cell lines, which may have importance in genetic counseling.
| Reference Key |
hwa2006journalprenatal
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| Authors | ;Hsiao-Lin Hwa;Tsang-Ming Ko;Chien-Hao Huang;Li-Shu Chang |
| Journal | Bioorganic & medicinal chemistry letters |
| Year | 2006 |
| DOI |
10.1016/S0929-6646(09)60165-0
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