【例1】　男,45岁。于1987年12月,因低热、乏力,诊断为肺结核,接受抗痨治疗。次年1月开始双下肢麻木感,由远端向近端发展,逐渐加重,肌张力增高,屈曲困难。发病6个月后双下肢活动受限,出现自发性肌束震颤,大小便失禁。脊椎X线摄片未见结核病灶;又行脊髓造影,未见脊髓受压。发病1 [Example 1] Male, 45 years old. In December 1987, because of fever, fatigue, diagnosis of tuberculosis, anti-tuberculosis treatment. The following year in January began a sense of numbness of both lower extremities, from distal to proximal development, and gradually increased, muscle tension increased, difficult to buckle. After 6 months of onset of lower extremity activity is limited, there spontaneous fasciculation, incontinence. Spine X-ray no tuberculosis; line myelography, no spinal cord compression. Disease 1