Callosal dysgenesis and lipoma

Case contributed by Frank Gaillard
Diagnosis certain
ultrasound
Sagittal
Coronal
Coronal
Coronal
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Transcranial ultrasound of an infant demonstrates a hyperechoic mass in the midline associated with callosal dysgenesis. 

Sagittal
T1
Axial
FLAIR
This study is a stack
Coronal
FLAIR
This study is a stack
Axial
T1
This study is a stack
Axial
T2
Axial T2
fat sat
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Info

MRI demonstrates dysgenesis of the corpus callosum, with only the genu seen and without a formed rostrum. In the midline is an interhemispheric lesion which is of high T1 signal, and demonstrates signal drop out on fat-saturated sequences consistent with a pericallosal lipoma. 

Case Discussion

Typical features of corpus callosum dysgenesis with an associated tubulonodular pericallosal lipoma.

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