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Fetus 3.
A, Parasagittal transvaginal sonogram of the fetal brain at 22 weeks’ gestation shows abnormal periventricular echogenicity with cystic formation (arrow) and striatal artery vasculopathy (arrowhead). Observe the presence of ventriculomegaly.
B, Sagittal transvaginal sonogram shows large cisterna magna (cm) and 4th ventricle (v), with hypoplastic vermis (arrow).
