斜坡肿瘤的MRI诊断

目的评价颅底区域肿瘤的MRI诊断价值。材料与方法经手术或穿刺活检病理证实的颅底肿瘤58例（如鼻咽癌、脊索瘤、侵袭性垂体瘤等），全部病例进行了MRI检查。结果侵袭性垂体瘤、脑膜瘤等少数肿瘤的MR信号具有特征性，肿瘤的中心部位对定性诊断有所帮助，当病变破坏广泛时鉴别比较困难。结论MRI可充分显示肿瘤的范围，部分肿瘤可依据其信号、部位与侵犯特征给予定性诊断。

Value of MRI in Clivus tumors

Objective:To investigate the value of MR in diagnosis of the tumors invading the Clivus area.Methods:Fifty -eight cases with Clivus tumors proved pathologically,including nasopharyngeal carcinoma,chordoma,invasive pituitary ad- enoma,etc.were examined by MRI.Results:The signal intensity of some tumors,such as invasive pituitary adenoma and me- ningothelioma,had some characteristics on MRI.The location of the lesion's center was helpful for qualitative diagnosis,nev- ertbeless,it was difficult to make differential diagnosis when the normal structure became extensively involved.Conclusion: MRI can well demonstrate the entire extent of the lesion.Based on the signal features,locations and invasive characteristics, qualitative diagnosis can be made for some tumors.