Study of MRI findings and Diagnostic value of MR myelography of cauda equina tumors With the intraspinal myelography of iophendylate or of Omnipaque, the intraspinal neurinoma can be fully observed, which can furnish the evidence for clinical diagnosis. 马尾神经区肿瘤MRI及MRM的诊断研究椎管内碘苯酯或Omnipaque非离子化造影可以全面动态地观察椎管内神经鞘瘤,为临床鉴别提供有力证据。