Female, 27 years old, 37 weeks GA, with ventriculomegaly on prenatal ultrasound. Image quality is degraded by fetal and respiratory motion. Within these limitations, the following observations are made.The lateral ventricles are dilated, measuring up to 19 mm diameter at the left atrium, and up to 14 mm diameter at the right atrium. Thinning of the brain parenchyma is seen in the peri-atrial regions.No obvious underlying etiology for the enlarged ventricles is seen. Specifically, no intracranial mass is suspected and the cerebral aqueduct appears to be patent. The third and fourth ventricles are normal in size.The cerebral hemispheres are otherwise normally formed. The corpus callosum is present. The brainstem and cerebellum are unremarkable.Fetal presentation is breech. Bilateral fetal hydroceles are evident. The fetal gallbladder is not clearly visualized.
1.Fetal ventriculomegaly with atrial diameters of 19 mm on the left and 14 mm on the right. No obvious underlying etiology is identified.2.No other definite intracranial abnormalities are detected within the limits of motion degredation.3.Incidental note is made of bilateral fetal hydroceles, which are of uncertain clinical significance. In addition, the fetal gallbladder is not visualized, which may be technical. Dedicated post-natal imaging is suggested to excluded biliary atresia. 