Callosal dysgenesis

Case contributed by Dr Maxime St-Amant



Patient Data

Age: 7 years
Gender: Male

The third ventricle is parallel to the lateral ventricles, indicating corpus callosal dysgenesis / agenesis. On sagittal reconstruction, there was dysgenesis of the corpus callosum, with hypoplastic rostrum, genu and body (absent splenium). There is also a midline lipoma and unexplained  frontal paramedian microcalcifications. Moreover, there is gyral thickening involving both frontal lobes, highly suggestive of pachygyria (this was confirmed on a previous MRI).

Not shown here, but the coronal reconstruction showed the characteristic viking helmet sign a.k.a. moose head appearance, with elevated and prominent frontal horns.

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Case information

rID: 18923
Published: 27th Jul 2012
Last edited: 14th Aug 2019
Inclusion in quiz mode: Included

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