Racing car sign – refers to widely spaced lateral ventricles due…

Racing car sign – refers to widely spaced lateral ventricles due to absence of the corpus callosum with intervening Probst bundles.  Appearances on axial MRI or CT are reminiscent of a formula one car seen from above, with the tires represented by the widely spaced frontal horns and the dilated trigones. This ventricular arrangement may also be referred to as colpocephaly.

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