垂体微腺瘤经鼻蝶术后MRI表现及临床分析

MRI features and clinic analysis of pituitary microadenoma after transsphenoidal operation

目的:探讨垂体微腺瘤经鼻蝶术后的MRI表现并作相关分析。方法:57例垂体微腺瘤经鼻蝶术后患者于术后1月或3月及以后作MRI检查,分别选取矢状位、轴位及冠状位扫描,且全部行Gd-DTPA增强扫描。结果:肿瘤全部切除49例;5例部分残留呈长T1长T2信号,增强时均匀强化;3例复发者直径大于8.0mm,信号不均匀,其内可见出血,增强呈不均匀强化。结论:①轴位FSE T2和冠状位SE T1增强序列非常重要;②MRI能准确区分肿瘤的残留与复发,为临床反馈客观信息;③该手术治疗垂体微腺瘤总体效果理想。

Objective：To study MRI features of pituitary mieroadenoma after transspbenoidal operation. Methods： MRI imaging of 57 cases were done by using T1WI SE sagital plane and T2WI of FSE at coronal plane, and T2WI of FSE at axial plane respectively. All added to Gd-DTPA enhanceed MR imaging. Results：Tumors were removed in 49 cases totally, and tumors were removed in 5 cases partially. The lesions showed hypo-or slight hypointensity on T1WI and hyper-intensity on T2WI, enhanced after injecting Gd-DTPA. While diameters were longer than 8.0mm in 3 cases in recurrence with hemorrhage, displayed symmetric intensity on both plane and enhanced imaging. Conclusion：①FSE on T2WI at axial and enhance on SE T1WI coronal are very important sequences;②The residual and recurrence of tumors can be distinguished on MR imaging, which provide objective imformation for clinic;③Transsphenoidal operation can achieve perfect result for treating pituitary microadenoma.