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
Sagittal T1-weighted MR