title: Trisomy 9 associated with maternal serum screening results positive for trisomy 18. Case report and review of the literature.
authors.forename: Valentina
authors.initials: V
authors.lastname: Priola
authors.forename: Antonio
authors.initials: A
authors.lastname: De Vivo
authors.forename: Giovanna
authors.initials: G
authors.lastname: Imbesi
authors.forename: Andrea
authors.initials: A
authors.lastname: Azzerboni
authors.forename: Onofrio
authors.initials: O
authors.lastname: Triolo
mesh_terms: D000328:Adult; D018997:Chorionic Gonadotropin, beta Subunit, Human / Q000097:blood*; D002899:Chromosomes, Human, Pair 9; D017809:Fatal Outcome; D005260:Female; D005333:Fetus; D006801:Humans; D011247:Pregnancy; D011266:Pregnancy-Associated Plasma Protein-A / Q000032:analysis*; D014314:Trisomy / Q000175:diagnosis*; D016216:Ultrasonography, Prenatal