脊髓纵裂畸形的MRI诊断

MRI Diagnosis of Diastematomyelia

目的：探讨脊髓纵裂畸形的MRI诊断价值。方法：共搜集8例脊髓纵裂畸形的临床及MRI资料。其中，男1例，女7例，年龄1～29岁，平均11岁。均行横轴面、冠状面T1WI，矢状面T2WI、T2WI。结果：本组Ⅰ型6例，2个半脊髓分别位于各自独立的硬膜囊，中间为骨或软骨间隔分开；Ⅱ型2例，2个半脊髓位于同一硬膜囊内，中间可有纤维性间隔。结论：MRI是诊断脊髓纵裂畸形及其椎管内伴发病变最有效的非创伤性检查方法；横断面T1WI是诊断脊髓纵裂的最佳断面；冠状面T1WI也能较好显示地病变。

Objective：To investigate the value of MRI in the diagnosis of diastematomyelia. Methods：Clinical and MRI materials of 8 cases with diastematomyelia were reviewed,including one male and seven females. The age ranged from 1 to 29 years old （mean= 11 years）. All cases had sagittal T1 WI and T2 WI,axial and coronal T1 WI. Results： Of the 8 patients, there were 6 patients with Type Ⅰ diastematomyelia,consisted of two hemicords,each was contained in its own dural sac independently and was separated by a rigid bony or cartilaginous median septum. Two patients were Type Ⅱdiastematomyelia,consisted of two hemicords contained in one single dural sac and separated by a fibrous septum. Conclusion： MRI is the most effective and non-invasive technique in the diagnosis of diastematomyelia and its related intra-vetebral canal anomalies. Axial plane T1 WI is the best view and sequence for the diagnosis,however, the lesion could also be shown on coronal plane T1 WI.