浅析脊髓前动脉综合征MRI诊断

Prelimiary analysis of MRI diagnosis for anterior spinal artery syndrome

目的:探讨脊髓前动脉综合征的病因、发病机制和MRI表现特点。方法:回顾性分析11例脊髓前动脉综合征患者的临床资料和MRI表现。结果:11例在MRI矢状面图像上均表现为范围不一的脊髓腹侧T2WI高信号灶,FLAIR图像上呈高信号,边界较清楚,其中T1WI上7例呈低信号,4例无信号改变;横轴面图像上3例可见典型的脊髓前角圆形病灶,呈"鹰眼征"。病灶位于颈段1例(1/11),胸段4例(4/11),颈胸结合段3例(3/11),胸腰结合段3例(3/11)。2例同时显示颈椎病和椎管狭窄,2例显示主动脉夹层,1例合并椎管内血管畸形。结论:脊髓前动脉综合征的MRI表现具有一定特征性,MRI对明确诊断以及病因判断有重要的临床应用价值。

Objective：To study the etiology,pathogenesis and MRI features of anterior spinal artery syndrome.Methods：Eleven cases of anterior spinal artery syndrome were recruited to retrospectively analyze the clinical data and MRI features.Results：All cases of anterior spinal artery syndrome showed different-sized high signals with rather clear border in ventral aspect of spinal cord on sagital T2WI and FLAIR sequences of MRI,including 7 cases of low signal and 4 without signal change on T1WI.3 cases showed typical round focal lesion in the anterior horn of spinal cord as ＂eagle eye ＂ sign on transverse axial MRI.All 11 cases included 2 with simultaneous cervical spondylosis and spinal stenosis,2 with aortic dissection and 1 case associated with intraspinal canal vascular malformation.The distribution of lesions of all cases included the cervical segment（1 case）,the thoracic（4 cases）,the cervico-thoracic junction（3 cases）,and the thoraco-lumbar segment（3 cases）.Conclusion：Anterior spinal artery syndrome possesses a certain characteristic MRI manifestation,providing important clinical application for accurate diagnosis and etiologic evaluation.