Non-contrast MRI demonstrates diffuse thinning of the corpus callosum, more pronounced in the anterior aspect, without any focal lesions and abnormal signal.
Abnormal cone-shaped T2/FLAIR hyperintensity at the tip of the frontal horn of the lateral ventricles in the region of the forceps minor (ear of the lynx sign).
Bilateral lateral ventricles are mildly dilated.
The findings mentioned above are most suggestive of hereditary spastic paraplegia.