Newborn with ventriculomegaly on prenatal ultrasound Pediatric Imaging Neurological July 11, 2022June 16, 2022 Coronal (above) and sagittal (below) US of the brain show dilation of the lateral and third ventricles. The fourth ventricle is normal in size. The diagnosis was aqueductal stenosis. Related Published July 11, 2022June 16, 2022