患者 ,男 ,2 4岁。自 1995年无明显诱因自觉腰部及左下肢痛 ,曾到当地医院诊断为“坐骨神经痛” ,经卧床、药物对症治疗无效 ,近半年来症状持续性加重 ,双下肢麻木、乏力 ,遂来院就诊。查体 :Ｌ4、5椎间隙叩痛阳性 ,向左小腿放射 ,左侧跟臀试验阳性 ,直腿抬高试验左 40° ,右 5 Patient, male, 24 years old. Since 1995 there was no obvious incentive to consciously lower back and lower limb pain waist, had to the local hospital diagnosed as “sciatica”, after bed rest, drug symptomatic treatment is invalid, the symptoms continued to worsen in the past six months, both lower extremities numbness, fatigue, and then to the hospital. Physical examination: L4, 5 intervertebral space percussion pain positive radiating to the left leg, left hip test positive, straight leg raising test left 40 °, right 5