Pericallosal lipoma

Presentation

Adult-onset seizures

Patient Data

Age: 30 years
Gender: Male
CT

A lobulated mass, uniformly hypoattenuating to CSF (average -90 HU), is seen within the interhemispheric fissure. Peripheral calcification of the mass is present.  

Case Discussion

These findings are characteristic for a large pericallosal lipoma. Its size and location favors the tubulonodular type. MRI would be valuable to help characterize the frequently associated dysgenesis of the corpus callosum. 

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