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  • Title: Prenatal diagnosis of de novo mosaic deletion 13q associated with multiple abnormalities.
    Author: Widschwendter A, Riha K, Duba HC, Kreczy A, Marth C, Schwärzler P.
    Journal: Ultrasound Obstet Gynecol; 2002 Apr; 19(4):396-9. PubMed ID: 11952971.
    Abstract:
    A case of prenatal diagnosis of de novo mosaic deletion of the long arm of chromosome 13 (del(13)(q13.3)) is presented. Routine scanning in a 27-year-old primigravida at 25 weeks' gestation showed fetal bilateral hydronephrosis. Detailed anomaly scanning in our tertiary referral center further demonstrated posterior meningoencephalocele, sloping forehead, microcephaly, syndactyly and hypoplastic thumbs. Both genetic amniocentesis and cordocentesis revealed a mosaic karyotype, 46,XY/46,XY,del(13)(q13.3). Sonographic findings were confirmed by postmortem autopsy and additional abnormalities such as agenesis of corpus callosum, hypoplastic cerebellum and macroglossia were diagnosed. Detailed sonography in this case thus revealed multiple malformations that prompted fetal karyotyping at 25 weeks' gestation.
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