1、腰椎未见明显畸形，腰椎活动度正常，腰部棘突及双侧棘旁无明显叩压痛，无放射痛；左侧梨状肌压痛，无放射痛；直腿抬高试验双80度阴性，双侧股神经牵拉试验阴性，梨状肌紧张试验阳性，左髋4字征阳性；双下肢感觉肌力正常；双侧腱反射正常，病理征未引出。患者诉于3天前无明显诱因下行走时出现左臀部疼痛，不伴左下肢放射痛，弯腰、坐位和站立时加重，卧床休息后疼痛症状缓解不明显；脊柱外观未见明显畸形，生理曲度存在，腰椎各棘突、棘旁无明显压痛，左梨状肌部压痛，无放射痛，直腿抬高试验右80阴性，左60阳性，加强阴性，双下肢肌力肌张力浅感觉未见异常，双下肢腱反射对称存在，病理征未引出。患者患者2周前无明显诱因下出现左髋周前
2、无明显诱因下出现左髋部疼痛，后依次出现左小腿上段、部疼痛，后依次出现左小腿上段、左足疼痛，并出现左足肿胀，疼左足疼痛，并出现左足肿胀，疼痛以活动及平卧示明显，坐位可痛以活动及平卧示明显，坐位可稍缓解，无腰痛、肢体麻木、发稍缓解，无腰痛、肢体麻木、发热畏寒、低热盗汗、热畏寒、低热盗汗、患者左髋、左小腿疼痛，屈曲、遇热疼痛缓患者左髋、左小腿疼痛，屈曲、遇热疼痛缓解，左足下垂，可直立，行动受限，左小腿解，左足下垂，可直立，行动受限，左小腿及左足麻木、发凉，左足趾麻木明显，及左足麻木、发凉，左足趾麻木明显，Right piriformis syndrome.A 42-year-old woman wi
3、th 2 yr history of intermittent partial foot drops and right gluteal pain.EMG was negative.Outside MR imaging of LS spine was reported normal,except small disc herniation at L5-S1 level.MRN LS plexus(A-E)shows small annular fissure and right paracentral disc herniation at L5-S1 level(A,B)on 3D TSE i
4、maging of lumbar spine.Coronal 3D IR TSE(C)shows bilateral split sciatic nerves(right left,arrows).Axial T2 SPAIR(D)image shows mildly enlarged and hyperintense right sciatic nerve(arrows),immediately outside the greater sciatic notch.Axial DTI(E)confirms more conspicuity of the right sciatic nerve abnormality(arrows).
