Prenatal and Postnatal Sonographic Confirmation of Congenital Absence of the Ductus Venosus in a Child with Noonan Syndrome

Figure 4

Transverse (a) and longitudinal (b) prenatal sonographic images demonstrating atypical umbilical venous anatomy at the level of the bladder. The transverse image demonstrates vessels coursing from the umbilicus into the fetus on either side of the bladder but with different Doppler flow directions indicating umbilical artery and vein. The longitudinal image demonstrates cord insertion and both arterial and venous flow into the fetal pelvis prior to joining the iliac vessels. Of note, there is no Doppler flow from cord insertion directly to the liver.

(a)

(b)