患者男 ,5 0岁。无明显诱因后腰部持续性疼痛并向右下肢放射 4个月 ,双下肢麻木、走路不稳、着地空虚感 3个月。查体 :Ｔ10 平面以下针刺感觉减弱 ,以右侧为主 ,右下肢精细触觉弱 ,双下肢肌萎缩 ,肌张力正常 ,左下肢肌力Ⅴ ,右下肢肌力Ⅳ ,Ｂａｂｉｎｓｋｉ(± )。ＭＲ表现 : Male patient, 50 years old. There was no obvious cause of persistent pain in the lower back and radiation to the right lower extremity for 4 months. The numbness of the lower extremities, unsteady walking, and emptiness on the ground were 3 months. Physical examination: The acupuncture sensation was weakened below the T10 plane, mainly on the right side, with a fine tactile sense in the right lower limb, muscle atrophy of the lower limbs, normal muscle tone, muscle strength in the left lower limb V, muscular strength IV in the right lower limb, and Babinski (±). MR performance: