患者男性,46岁.因腰痛、右下肢麻木半年,先到某地区医院骨科就诊,以腰椎间盘突出症收住院.行腰椎管造影检查,当推入优索显造影剂时,患者感胸腰段呈刀割样剧烈疼痛,难于忍受,造影后小便即不能自解,3天后疼痛才逐渐缓解.20天后以腰椎间盘突出症在腰麻下行半椎板切除椎管探查术,术中探查L_2～S_1与5个椎间隙,均未见间盘突出征象,仅见黄韧带增厚,L_(2、3) Male patient, aged 46. Because of low back pain, paralysis of the right lower limb for six months, first visited the orthopedic hospital in a district, lumbar disc herniation admitted to hospital .Linear angiography, when pushed into the superior cable imaging agent, the patient thoracolumbar Section was a sharp knife-like pain, difficult to endure, urination that can not self-resolution after angiography, 3 days after the pain was gradually alleviated .20 days after lumbar disc herniation in spinal anesthesia underwent half-laminectomy spinal exploration, intraoperative exploration L_2 ~ S_1 and 5 intervertebral space, no signs of disc herniation, only to see the thickening of the ligamentum flavum, L_ (2,3)