Spinal synovial cyst
Right leg pain
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There is small rounded lesion at right lateral recess of L5-S1 adjacent right facet joint, appears hypointence T1 W and hyperintense T2W image, it measures about 7mm , causes mass effect, compressing and diplacing the right nerve root anteriorly.
Also noted right facet joint arthropathy.
Small cystic lesion adjacent facet joint, with facet joint arthropathy, likely spinal synovial cyst.