锥体束华勒氏变性的MRI诊断

MRI diagnosis of Wallerian degeneration

目的:探讨颅内病变继发锥体束Wallerian变性的磁共振表现,以提高对该继发改变的认识和诊断。方法:收集颅内病变继发锥体束Wallerian变性的患者23例,对原发病变及Wallerian变性的MRI表现进行分析。结果:所有原发病变均位于幕上,单侧发病22例,双侧发病1例,病变侧均出现锥体束信号异常,其中9例伴有同侧脑干体积缩小。结论:MRI诊断Wallerian变性有独特的优势和价值。

Objective： To study the MRI characteristics of Wallerian degeneration of the pyramidal tract involved in intracranial diseases,promote the recognition and diagnosis of this kind of degeneration. Methods： Twenty-three cases of Wallerian degeneration of the pyramidal tract involved in intracranial diseases were collected and all the MRI characteristics was analysed. Results： All the primary diseases were above the tentorium of cerebellum,of which 22 cases were located at one side of hemisphere and 1 case was demonstrated bilaterally. The abnormal signal of pyramidal tract was found at the same side of the primary disease,of which brain stems atrophy were found in 9 cases. Conclusion： MRI has large advantages and is quite valuable in the diagnosis of Wallerian degeneration.