title: Monoamniotic twins discordant for anencephaly: diagnosis by CT amniography.
abstract: Prenatal diagnosis of monoamnionicity is necessary for optimal care of a twin gestation. When the fetuses are discordant for a lethal anomaly, unequivocal confirmation is imperative. Ultrasound evaluation of our patient revealed a twin gestation discordant for anencephaly and with possible monoamnionicity. When sonography was inconclusive, CT amniography confirmed a single amniotic cavity, permitting appropriate parental counseling and pregnancy management. CT amniography is a useful adjunct to ultrasound in evaluating twins discordant for a lethal anomaly when monoamnionicity is suspected.
authors.affiliation: Department of Obstetrics and Gynecology, U.S. Naval Hospital, Portsmouth, VA 23708.
authors.forename: J R
authors.initials: JR
authors.lastname: Wax
authors.forename: J F
authors.initials: JF
authors.lastname: Smith
authors.forename: R C
authors.initials: RC
authors.lastname: Floyd
mesh_terms: D000328:Adult; D000650:Amnion; D000653:Amniotic Fluid; D000757:Anencephaly / Q000000981:diagnostic imaging*; D004200:Diseases in Twins; D005260:Female; D005315:Fetal Diseases / Q000000981:diagnostic imaging*; D006801:Humans; D011296:Prenatal Diagnosis / Q000379:methods*; D014057:Tomography, X-Ray Computed