关节突关节肥大或滑囊囊肿可造成腰椎侧方和中央狭窄，这将对神经根造成压迫。

FJ hypertrophy or a synovial cyst can contribute to lateral and central lumbar stenosis, which can lead to impingement on the exiting nerve root.

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结论：CT不仅能诊断腰椎退变性滑脱症，而且还能显示硬膜囊和神经根的改变。

Conclusion: CT can not only diagnose lumbar degenerative spondylolisthesis but also show the changes of dural sacs and nerve roots.

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使用神经牵引器轻柔的牵拉与保护硬膜囊与神经根。

The thecal sac and nerve root are then gently retracted and protected with a nerve retractor.

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