By Chris Faubel, M.D. —
A lipoma or fibrolipoma of the filum terminale is a somewhat uncommon (4-6%) and usually incidental, asymptomatic finding on MRIs of the lumbar spine.
Imaging
Best visualized on sagittal T1-weighted MRIs
T1-weighted MRI = hyperintense
T2-weighted MRI = hyperintense (though not nearly as obvious)
Clinical Significance
Typically asymptomatic
Can sometimes be associated with a low-lying and thickened conus in cases with clinical findings consistent with tethered cord syndrome.
 and usually incidental, asymptomatic finding on MRIs of the lumbar spine.){kind=link}
What does it mean if my son’s mri showed thin fibrolipoma of the filum terminale.