Four-dimensional ultrasonography of a true knot of the umbilical cord.
We describe the prenatal diagnosis of a true knot of the umbilical cord using the "hanging noose" sign. Changes in the tension of the knot, which are related to fetal movements, were studied with 4-dimensional ultrasonography.
Ramón y Cajal
Carlos López
CL
Prenatal Diagnosis Unit, Service of Obstetrics and Gynecology, Hospital Xeral, Pontevedra, Spain. clopezr@meditex.es
Martínez
Raquel Ocampo
RO
D000328:Adult; D005260:Female; D006801:Humans; D011247:Pregnancy; D018608:Ultrasonography, Doppler; D016216:Ultrasonography, Prenatal; D014470:Umbilical Cord / Q000002:abnormalities* / Q000000981:diagnostic imaging*