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目的:探讨鞍区Rathke氏囊肿的MRI表现特征。方法:回顾性分析经手术、病理证实的鞍区Rathke氏囊肿的病例共15例所有病例均行MRI平扫及增强检查男6例女9例年龄20岁~45岁平均32岁。结果:囊肿位于鞍内者9例鞍上者2例鞍内鞍上者4例。Rathke氏囊肿的MRI信号变化多种多样一般无明显强化少数囊壁呈环形强化。所有15例Rathke氏囊肿在MRI上均表现为鞍内或鞍上的类圆形或椭圆形囊性肿物。病变直径小于1cm者2例;1~3cm者11例;大于3cm者2例。7例为长T1、长T2信号5例为短T1、长T2信号2例为短T1、短T2信号1例信号不均匀。增强扫描其中有6例于囊肿边缘出现环形强化。结论:由于Rathke氏囊肿囊内成分的不同在MRI上信号变化多样,MRI多方位、多序列及增强扫描对Rathke氏囊肿的诊断和鉴别诊断有重要价值。
Objective: To investigate MRI features of Rathke’s cysts in the sellar region. Methods: A retrospective analysis of 15 patients with surgically and pathologically confirmed saddle-zone Rathke’s cysts was performed in all cases. MRI and enhanced MRI were performed in 6 males and 9 females with a mean age of 32 years ranging from 20 years to 45 years. Results: There were 4 patients with saddle internal saddle and 2 saddle internal saddle with 9 patients with intracranial cyst in the saddle. Rathke’s cyst MRI signal changes in a variety of generally no significant enhancement of a small number of annular wall enhancement. All 15 Rathke’s cysts showed round or oval cysts on the saddle or saddle on MRI. Lesions diameter less than 1cm in 2 cases; 1 ~ 3cm in 11 cases; more than 3cm in 2 cases. 7 cases were long T1, long T2 signal 5 cases were short T1, long T2 signal 2 cases short T1, short T2 signal 1 case of uneven signal. Six of the patients underwent enhanced scan with circular enhancement around the edge of the cyst. Conclusion: Due to the diversity of components in Rathke’s cysts, the signals of MRI vary widely. MRI multi-orientation, multi-sequence and contrast-enhanced MRI are valuable for the diagnosis and differential diagnosis of Rathke’s cyst.