Lumbar Canal Stenosis Caused by Marked Bone Overgrowth after Decompression Surgery

Figure 4

Radiographic images before and after the third surgery. (a) Computed tomography (CT) myelogram before the third surgery showing re-restenosis due to marked bone overgrowth of the lamina and facet joints. (b) Magnetic resonance (MR) image before the third surgery showing central canal restenosis due to marked bone overgrowth and disc herniation of L3/L4. (c) Dynamic X-ray images (neutral, extension, and flexion position) before the third surgery showing no significant changes in lumbar alignment or spinal stability. (d) CT image 1 day after the third surgery showing the results of the bilateral laminectomy at L3/L4.

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