Newborn with hydrocephalus on prenatal US

Head US of agenesis of the corpus callosum
Coronal US of the brain shows a Viking horn appearance of the anterior horns of the lateral ventricles (above left) and parallel bodies of the lateral ventricles (above right). Sagittal US of the brain (below) shows absence of the corpus callosum.

The diagnosis was agenesis of the corpus callosum.