title: First-trimester transvaginal ultrasonographic diagnosis of Dandy-Walker malformation.
abstract: We present transvaginal ultrasonographic findings of a fetus with Dandy-Walker malformation and associated massive obstructive hydrocephalus at 13 weeks' gestation. First-trimester ultrasonographic diagnosis of Dandy-Walker malformation is uncommon with only two such occurrences having been reported previously. These cases and recent reports of single gene transmission of this condition in some families emphasize the importance of first-trimester transvaginal ultrasound assessment especially in women with previously affected fetuses.
authors.affiliation: Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, St. Luke's Roosevelt Hospital Center, Columbia University College of Physicians and Surgeons, New York, New York 10019, USA.
authors.forename: D M
authors.initials: DM
authors.lastname: Sherer
authors.forename: H
authors.initials: H
authors.lastname: Shane
authors.forename: K
authors.initials: K
authors.lastname: Anyane-Yeboa
mesh_terms: D000328:Adult; D003616:Dandy-Walker Syndrome / Q000000981:diagnostic imaging*; D005260:Female; D005315:Fetal Diseases / Q000000981:diagnostic imaging*; D006801:Humans; D011247:Pregnancy; D011261:Pregnancy Trimester, First; D012886:Skull / Q000000981:diagnostic imaging; D016216:Ultrasonography, Prenatal / Q000379:methods*; D014621:Vagina