prenatal diagnosis of mos45,x/46,x,+mar in a fetus with normal male external genitalia and a literature review
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ID: 147621
2009
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Abstract
Objective: Prenatal diagnosis of mos45,X/46,X,+mar is difficult in genetic counseling. Patients with the presence of a Y-derived marker may manifest male or female external genitalia. Here, we report a fetus with phenotypically male external genitalia of mos45,X/46,X,+mar. In addition, the cases with prenatally detected mos45,X/46,X,del(Y)(q11.2) and normal male external genitalia are reviewed.
Case Report: A 30-year-old, primigravid woman was referred for amniocentesis because of an abnormal Down syndrome screening result at 20 weeks' gestation. Cytogenetic analysis showed mos45,X/46,X,+mar without a normal Y chromosome. Prenatal ultrasound detected symmetric intrauterine growth restriction and normal male external genitalia. After termination of the pregnancy, a phenotypically normal male fetus was delivered smoothly without apparent structural defects. Based on conventional G-banded analysis, the marker chromosome appeared as a Y chromosome that originated with a deleted Yq, designated as del(Y)(q11.2).
Conclusion: Based on a literature review, the addition of fluorescence in situ hybridization and molecular analysis to the conventional cytogenetic techniques can provide more accurate identification of a Y chromosome aberration in the prenatal detection of mos45,X/46,X,+mar, thus allowing more appropriate genetic counseling for the family.
| Reference Key |
chien2009taiwaneseprenatal
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|---|---|
| Authors | ;Shu-Chin Chien;Chih-Ping Chen;Chyi-Chyang Lin;Li-Chia Huang;Cheng-Tiao Hsieh;Fuu-Jen Tsai |
| Journal | spermova |
| Year | 2009 |
| DOI |
10.1016/S1028-4559(09)60307-7
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