title: Facial cleft or shadowing artifact?
authors.forename: K Y
authors.initials: KY
authors.lastname: Leung
authors.forename: C S W
authors.initials: CS
authors.lastname: Ngai
authors.forename: M H Y
authors.initials: MH
authors.lastname: Tang
mesh_terms: D000328:Adult; D000650:Amnion / Q000002:abnormalities* / Q000000981:diagnostic imaging; D016477:Artifacts; D003937:Diagnosis, Differential; D005147:Facial Bones / Q000002:abnormalities*; D005260:Female; D005333:Fetus / Q000002:abnormalities*; D006801:Humans; D011247:Pregnancy; D016216:Ultrasonography, Prenatal