椎管肿瘤伴脊髓空洞症的MRI研究

The MRI diagnosis and differential diagnosis of syringomyelia associated with intraspinal tumor

目的：研究了51例椎管肿瘤并脊髓空洞症的MRI诊断和鉴别诊断。方法：全部病例均用SE序列进行矢。横断面成像。结果：椎管内肿瘤好发于颈胸髓，局部脊髓增粗，信号不均匀，瘤巢均有明显强化，有37.3％的脊髓内肿瘤发生囊变，囊壁水肿较明显。脊髓空洞位置远离肿瘤，范围明显较肿瘤为广，平均累及6.48个脊椎节段。偏心型和多腔空洞较多见（58％），少数可见肘脊液流空现象（CFVP），本文对脊髓空洞症的发病机理进行了探讨。结论：MRI是本病最有效的检查方法;增强扫描对于鉴别脊髓内空洞、肿瘤囊变与正常脊髓有十分重要的意义。

Objective: To study the MRI diagnsis and differential diagnosis of syringomyelia assoiated with intraspinal neoplasms. Methods: 51 cases of swingomyelia associated with intraSPinal tUmr were stUdied. All cases were exdrined 0n SE sequences.Rcsults: Most turnors involved the cervical and celvicothoracic segment with inhomogeneous signal intenShes. The sighal intensity of tumors increased on POstcontras scan. Inhatumral cyst were seen in 37 .3% cases. The edema amund the cyshc areas was clearly observed. The syrinx cavities l0cated far from the neopasms. The length of sghnx cavities was gnater than that 0f the intramdull tumrs.Avemp length of cavites were 6.84 vertebrel segments. Eccentric cavihes and multiPle cavities was frequenily demonstrates(58% ).The CFVP was noted in nine cases. Conchaons: MRI is the best diagnostic pmeedure for swingomyalia associated with intraspinal neoplasms;The postcontod scan is very importan to differentiate the sghnx cavihes and tumoral cysts for norinal spinal coul. The Pathogenesis of syringomyelia has been discussed.