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Fetal brain at 22 weeks of gestation (normal male; 46, XY karyotype) with bilateral subependymal heterotopia, ventriculomegaly and cerebellar asymmetry. Coronal (1a) and axial (1b) US images show enlargement of the frontal (white arrow) (1a) and occipital (white arrowheads) (1b) horns of the lateral ventricles. (GE Voluson 730 Expert, 3.5 MHz convex transducer).
