Mild ventriculomegaly on antenatal screening ultrasound. The occipital horns and atria of the lateral ventricles are prominent. Axially, the atria measure up to 10 mm in width on both sides, which is the upper limit of normal. The remainder of the lateral ventricles are normal in size. Also, the third and fourth ventricles are not dilated. The corpus callosum is appropriately formed. Sulcation is appropriate for age. There is no focal parenchymal signal abnormality. The brainstem and cerebellum are normally formed.
The atria and occipital horns of the lateral ventricles are top normal or mildly enlarged. No additional abnormalities are seen. 