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Small altered signal intensity extradural lesion is noted at L4 vertebral body level along left-posterior aspect moderately displacing cauda equine roots and thecal sac to right side.
It appears hypointense on T1WI and hyperintense on T2WI images and shows suppression on FS study.
Severe ligamentum flavum hypertrophy (6.5mm) as well as with mild spinal canal compromise is noted at this level.
Grade I anterolisthesis of L4 over L5 vertebrae.