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Illustrative Case number 9. Radiological studies obtained in a 83-year-old man. Sagittal (a) and axial (b) T2-weighted magnetic resonance images of the lumbar spine, showing narrowing of the spinal canal at L4–5 and L5-S1 and bilateral foraminal stenosis. (c and d): AP and lateral radiograph at 12 months postoperative demonstrating the proper position of the screws and cages, and the absence of implant-related complication.
