Female, 38 years old, 24 weeks gestational age, with fetal ventriculomegaly as seen on ultrasound. The atria of the lateral ventricles are enlarged, each side measuring up to 13 mm in the axial plane. The frontal horns are within normal limits. The fourth ventricle is also normal in size. The cerebral aqueduct is not reliably visualized due to fetal motion and as such, patency of the aqueduct cannot be assessed.The cavum septum pellucidum is not confidently visualized. However, the corpus callosum is present. The brainstem and posterior fossa are within normal limits. Cerebral morphology and the degree of sulcation are appropriate for gestational age. No evidence of intracranial hemorrhage or any abnormal extra-axial fluid collections are detected.
1.Mild bilateral ventriculomegaly is seen. Although no clear etiology for this is identified, the cerebral aqueduct is not adequately visualized to assess for patency.2.The cavum septum pellucidum is not reliably visualized. However, the corpus callosum is present and appears to be normally formed.3.The remainder of the examination is within normal limits.