Objective To explore the clinical and imaging features of spinal dural arteriovenous fistulae (SDAVF). Methods The clinical date of 3 SDAVF patients diagnosed by spinal MRI and spinal angiography were analyzed retrospectively. Results The 3 cases were middle and old men. The clinical charaeteristies were progressive and ascending disability of motion, sensory in lower extremities and sphincter dysfunction. MRI showed the combination of thoracic cord edema over multiple segments, increased central cord signal on T2 WI, perimedullary dilated vessels on T2WI and pronounced after enhancement. Spinal angiography demonstrated T3, T7 and T11 spinal dural arteriovenous fistulae respectively. Conclusions SDAVF is mostly affected middle and old men and the clinical manifestations are progressive damage of thoracic spinal cord. MRI can show the spinal cord lesion and abnormal vessels.%目的 探讨硬脊膜动静脉瘘(SDAVF)的临床和影像学特点.方法 对3例经MRI、脊髓血管造影确诊的SDAVF患者的临床资料进行回顾性分析.结果 3例患者均为中老年男性,主要临床表现为两下肢进行性运动、感觉障碍和括约肌功能障碍.MRI表现为长节段胸髓增粗、T2WI髓内高信号、脊髓表面见血管流空信号,血管及髓内病灶增强扫描可见强化；脊髓血管造影分别显示T3、T7、T12硬脊膜动静脉瘘.结论 SDAVF的临床特点为多发生于中老年男性的胸段脊髓进行性损害的表现.MRI可显示相应节段的脊髓损害及血流异常.
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