鞍区Rathke囊肿的MRI表现

MRI appearance of Rathke′s cleft cysts

目的 总结垂体Rathke囊肿的MRI表现 ,以提高对该病的认识。方法 回顾性分析 17例经手术和病理证实的Rathke囊肿的MRI表现。结果 17例Rathke囊肿多呈圆形或类圆形 ,边界清楚 ,10例位于鞍内 ,7例位于鞍内和鞍上。MR信号在T1WI和T2 WI上表现为 :7例长T1、长T2 ,6例短T1、长T2 ,2例等T1、等T2 ,1例等T1、长T2 ,1例短T1、短T2 。 6例行增强扫描 ,3例无增强 ,3例囊肿边缘增强。结论 垂体Rathke囊肿表现为鞍内或鞍内和鞍上的囊性占位 ,MRI信号多样 ,但结合MRI形态。

Objective To describe the MR findings of Rathke cleft cyst, and to improve clinical knowledge to this entity. Methods MR findings of 17 pathologically confirmed Rathke cleft cysts were retrospectively studied. Results Among the 17 patients, most of the Rathke′ s cleft cysts were round or oval in shape with clear border. 10 cysts were located intrasellarly, and 7 were located both intrasellarly and suprasellarly. MRI signals were long T 1 and long T 2 in 7 patients, short T 1 and long T 2 in 6, iso- T 1 and iso- T 2 in 2, iso- T 1 and long T 2 in 1, and short T 1 and short T 2 in 1. Among the 6 patients who underwent contrast enhanced MRI, 3 showed no enhancement, and 3 were enhanced peripherally. Conclusion Rathke′s cleft cyst appears as a cystic lesion located at sellar region. Although its signal intensity is various, but the correct diagnosis may be obtained by integrating MRI findings, clinical pictures and other imaging findings.