Partial corpus callosum agenesis WITH callosal lipoma

History: 29-year-old woman with mild mental retardation

Findings: A sagittal T1-weighted image demonstrates a large midline hyperintense mass associated with partial callosal agenesis.
An axial T2-weighted image reveals a large lobulated mass following the signal intensity of fat located along the interhemispheric
fissure. Note the chemical artifact at the margins of the mass (images not shown)

Dx: Partial corpus callosun agenesis WITH callosal lipoma

sample images

Sagittal T1-weighted MR

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