Prenatal diagnosis of trisomy 9 mosaic presenting as a case of Dandy-Walker malformation.

Abstract	Trisomy 9 syndrome is a rare chromosomal anomaly associated with specific patterns of multisystem dysmorphism and occasional central nervous system (CNS) malformations, the most common being the Dandy-Walker malformation. Milder anomalies are usually seen with trisomy 9 mosaicism. We report what we believe to be the first case of a baby with an isolated Dandy-Walker malformation which was diagnosed prenatally and was subsequently found to have a trisomy 9 mosaic syndrome.
Authors	Y A Bureau, W Fraser, B Fouquet
Journal	Prenatal diagnosis (Prenat Diagn) Vol. 13 Issue 2 Pg. 79-85 (Feb 1993) ISSN: 0197-3851 [Print] England
PMID	8464839 (Publication Type: Case Reports, Journal Article)
Topics	Adult Amniocentesis Brain (abnormalities, embryology) Cerebellum (abnormalities, diagnostic imaging, embryology) Chromosomes, Human, Pair 9 Dandy-Walker Syndrome (diagnosis, genetics) Female Fetal Diseases (diagnosis, genetics) Humans Infant, Newborn Karyotyping Magnetic Resonance Imaging Male Mosaicism Pregnancy Pregnancy Trimester, Third Trisomy Ultrasonography, Prenatal

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