Results: All 9 cases had the symptoms of lumbar stenosis and nerve roots of the cauda equina bended like snake curve above the stenosis of spinal canal by means of canal myelography.

• 结果:9例患者除具有腰椎管狭窄症的一般临床表现之外,椎管造影结果显示狭窄节段上方马尾神经根呈波浪状蛇形卷曲,甚至“环状”改变,9例患者均行手术治疗。