患者女，30岁。腰痛伴左下肢麻木无力9个月，近来症状加剧，既往曾疑有小儿麻痹后遗症病史。体检：腰。－。左侧椎分压痛，左下肢较对侧明显变细，痛觉减退。图1椎管左后方示低密度影，CT值一80．OHU。图2矢状位Tl加权像椎管内混杂高信号。CT：腰。椎体下缘至腰。椎体上绿水平 Female patient, 30 years old. Back pain with numbness in the left lower extremity for 9 months, the symptoms have recently increased, and there has been a history of poliomyelitis sequelae. Physical examination: waist. -. Left vertebral tenderness, the left lower extremity was significantly thinner than the contralateral, hypoalgesia. Figure 1 shows the low-density shadow on the left and right side of the spinal canal, and the CT value is 80. OHU. Figure 2 Sagittal Tl-weighted images with mixed high signals in the spinal canal. CT: Waist. The lower edge of the vertebral body to the waist. Vertebral body on green level