Clinical question: History of L5-S1 fusion, now with buttock pain.? Spinal versus neural foraminal compromise. Signs and symptoms: As above. Nonenhanced lumbar MRI:L5-S1 demonstrates advanced degenerative disc disease with grade 1 anterolisthesis without significant change since prior exam and without evidence of spinal stenosis. There is however compromise of bilateral neural foraminal without significant change since prior exam. There is no evidence of acute new finding at this level. Postoperative changes of prior fusion and including transpedicular screw placement without convincing evidence of instrumental failure.Mild degenerative disc disease and hypertrophic changes of posterior elements at other levels are noted however without evidence of an acute finding, no evidence of central spinal stenosis or neural foraminal compromise.Unremarkable. Spinal soft tissues and unremarkable partially visualized SI joints.
1.Interval posterior fusion at L5-S1 level with persistent grade 1 anterolisthesis, no central spinal stenosis and stable bilateral neural foraminal compromise. No evidence of acute finding at this level.2.Mild degenerative changes at other levels however without spinal stenosis or neural foraminal compromise.