患者男,36岁。2个月前无明显诱因出现腰痛伴双下肢麻痹,右下肢疼痛,呈持续性,夜晚加重。体检:双侧腰部叩痛,脐平面以下感觉明显减退。胸椎MRI:T10~11椎体平面椎管右侧髓外硬膜内可见一大小约22 mm×10 mm×8mm椭圆形异常信号,边界清晰,脊髓受压向左推移,T1WI呈等信号(图1), Male patient, 36 years old. 2 months ago, there was no obvious incentive to lower back pain with lower limb paralysis, pain in the lower limbs, was persistent, worse at night. Physical examination: bilateral lumbar percussion pain, umbilical plane significantly decreased feeling. Thoracic MRI: T10 ~ 11 vertebral flat spinal canal on the right extramedullary plexus showed a size of about 22 mm × 10 mm × 8mm oval abnormal signal, the boundary is clear, the spinal cord pressure shift to the left, T1WI was equal signal (Figure 1),