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This medical exhibit depicts a decompression laminectomy procedure at L3-4, L4-5 leading to a surgical discectomy at L5-S1. The illustrations depict the following surgical steps: A. Removal of the laminae and spinous processes to decompress the spinal cord; B. Hemifacetotomies of L3-4 and L4-5; C. Foraminotomies to decompress spinal nerve roots; and D. Removal of herniated and degenerated intervertebral disc material at L5-S1.