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Fetus at 16 weeks’ gestational age with an asymmetric appearance of the choroid plexus. A, Axial transabdominal sonogram of the fetal head showing asymmetry of the choroid plexus, with the far-field ventricle (arrow) extending further anteriorly than the near-field ventricle. B, Coronal transabdominal sonogram showing echogenic material in the far-field frontal horn with expansion (arrow).
