Ultrasound features of congenital cytomegalovirus infection in the first trimester: A case report

Figure 1 Midsagittal view of fetal head with cytomegalovirus infection at 12 weeks and 3 days of gestation demonstrating a hyperechoic thalamus, which is typically anechoic under normal conditions. The caudal anechoic band indicates the third ventricle. T: Thalamus; 3V: Third ventricle; BS: Brain stem; AS: Aqueduct of Sylvius; 4V: Fourth ventricle; CM: Cisterna magna; NT: Nuchal translucency.

Figure 2 Axial view of the fetal head in the third trimester. A: The transverse view of the fetal head at 35 weeks of gestation demonstrated midline and intraventricular calcifications (orange arrow); B: At 38 weeks of gestation, the transverse view exhibited multiple cysts, ventriculomegaly, and a smooth brain surface (lissencephaly).