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Arnold-Chiari Malformation
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  A lower lumbar neural tube defect lead to a tethered cord and Arnold-Chiari malformation in this fetus. Characteristic angled ventricles and lemon-shaped skull are seen.
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  Coronal views demonstrate angular ventricles. Both the neural tube defect and the herniation of the brainstem through the cisterna magna are clearly visible on this mid-sagittal view.
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  Prenatal imaging demonstrated angular ventricles and cerebellar herniation. Postnatal MR provides a clearer illustration of the Arnold-Chiari malformation.
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