Clinical History: 35-year-old female, incidental finding. Radiological Findings: Sagittal T1W T1-hyperintense lesion extending the callosal sulcus Sagittal section clearly demonstrate the curvilinear morphology and its relationship with the corpus callosum A thin, curvilinear T1-hyperintense lesion is observed extending along the callosal sulcus, following the dorsal aspect of the corpus callosum. The signal characteristics are consistent with fat. There is no associated co