Rathke裂囊肿的MRI表现  

MRI findings of Rathke's cleft cyst

作　　者：王悦[1] 有慧[2] 冯逢[2] WANG Yue;YOU Hui;FENG Feng(Department of Radiology,the Fourth People's Hospital of Shenyang,Shenyang 110031,China;Department of Radiology,Peking Union Medical College Hospital,Beijing 100730,China)

机构地区：[1]沈阳市第四人民医院放射科,辽宁沈阳110031 [2]北京协和医院放射科,北京100730

出　　处：《实用放射学杂志》2021年第2期184-187,共4页Journal of Practical Radiology

摘　　要：目的探讨Rathke裂囊肿(RCC)的MRI表现。方法回顾性分析51例经病理证实的RCC的MRI特点。结果51例中19例位于鞍内,31例位于鞍内和鞍上,1例位于鞍上。病变呈圆形、类圆形或哑铃形,边界清楚,囊壁菲薄。MRI平扫信号多样,以短T1WI、等T2WI信号为主。其中19例囊内可见结节,8例囊内可见分层,且分层现象不随体位改变而变化。增强扫描25例无明显强化,26例可见边缘强化,其中21例呈细线样薄壁强化,5例不均匀厚壁强化。21例薄壁强化中,18例呈不完整环形强化,囊内结节无强化。结论RCC表现为鞍区的囊性占位,MRI平扫信号多样,增强扫描多呈薄壁不完整环形强化或无明显强化。囊内结节、囊内分层且不会随体位变化改变现象是RCC相对特征性表现,有助于与垂体腺瘤出血、囊变等鉴别。Objective To study the MRI findings of Rathke's cleft cyst(RCC).Methods The MRI characteristics of 51 cases with RCC confirmed by pathology were analyzed retrospectively.Results Among the 51 cases,19 cysts were located intrasellarly,31 located both intrasellarly and suprasellarly,and 1 was located suprasellarly.The lesions were round,oval or dumbbell in shape and well demarcated.The signal intensity varied,most lesions were hyperintense on T1WI and isointense on T2 WI.Intracystic nodules were visualized in 19 cysts.Intracystic precipitate were visualized in 8 cysts,which did not shift with body position.On enhanced images,25 cysts showed no enhancement and 26 showed peripheral enhancement.Among the 26 lesions with peripheral enhancement,thin wall enhancement with thin line was demonstrated in 21 and relative thick peripheral enhancement in 5.Among the 21 cysts with thin wall enhancement,the ring enhancement was not intact in 18.The intracystic nodules showed no enhancement.Conclusion RCC appears as a cystic lesion located in sellar region with varied MRI signal intensity.The lesions usually show no or incomplete ring-enhancement.The intracystic nodules and precipitate are relatively characteristic MRI findings,which may be valuable for differential diagnosis from pituitary adenoma with hemorrhagic or cystic changes.

关 键 词：垂体肿瘤 RATHKE裂囊肿 磁共振成像 

分 类 号：R739.41[医药卫生—肿瘤] R445.2[医药卫生—临床医学]