Findings: Grade 1 anterrolisthesis of L4 in relation to L5 is noted. Upper lumbar alignment is perserved. There is no evidence of acute compression fracture. The conus medullaris terminates at the L1-2 level, and is unremarkable.
At L4-5, a broad right subarticular and foraminal disk pretrusion with associated anterolisthesis contributes to severe right foraminal stenosis and likely mass effect upon the exiting right L4 nerve root.
At L4-5-S1, a mild broad central disk protrusion is present without compressive sequelae. The other disk levels are preserved. There is no evidence of transiting nerve root impingement.
The visualized sacroiliac joints are unremarkable.
The paraspinal soft tissues are preserved.
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