Chapter 2 The intervertebral disc

L3-L4 . L4-L5 . L5-S1 . Request is for lumbar fusion . ... Individual has radiculopathy secondary to a herniated disc and has radiographic evidence of . lumbar spinal instability (for example, spondylolisthesis) ... Individual has degenerative disc disease limited to the single spinal level at which the lumbar TDA . ................
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