患者　男 ,48岁。自幼跛行 ,右足无力 ,2岁时曾被诊断为“脊柱裂” ,未予治疗。近年来跛行加重 ,行走费力 ,且出现小便失禁 ,大便排泄困难等症状就诊。体检 :双下肢较细 ,双髋伸屈肌力Ⅴ级 ,双膝伸屈肌力Ⅳ级 ;右踝关节伸屈肌力Ⅰ级 ,伸展肌力 0级 ;左踝关节背伸肌力Ⅳ级 ,跖屈 Male patient, 48 years old. My childhood limp, right foot weakness, 2 years old was diagnosed as “spina bifida”, no treatment. In recent years, increased limp, walking hard, and urinary incontinence, difficulty excretion of stool symptoms and other treatment. Physical examination: thin lower limbs, double hip extensor flexion Ⅴ level, flexion and extension of knees Ⅳ; right ankle flexion and extension strength Ⅰ, stretch muscle strength 0; left ankle joint extensor muscle strength Ⅳ , Plantar flexion