侵袭型胶质瘤的MRI诊断及地形学研究

目的：探讨侵袭型胶质瘤的ＭＲＩ表现，提高对本病的认识，利于诊断和鉴别诊断。方法：对４８例经手术和病理证实的侵及颅内多部位的腔质瘤ＭＲＩ表现进行分析。结果：侵袭型胶质瘤通常侵犯颅内三个以上，ＭＲＩ信号为明显长Ｔ１和Ｔ２内常合并坏死，及瘤结节形成，且伴有不同程度的占位效应及造影剂强化效应。ＭＲＩ可清楚显示其地形学或局部解剖学情况。结论：侵袭型胶质瘤是胶质瘤的一个特殊临床类型对本病的诊断具有指导性意义。

MRI diagnosis of invasive glioma and its topographic study

Objective:To investigate the MRI manifestations of invasive glioma,and to improve the recognization ability of diagnosis and differential diagnosis.Methods:Fourty-eight cases of invasive gliomas underwent MR scan.All these cases were proved by operation and pathology.Results:Invasive gliomas presented as obviously long T1 and long T2 signal intensity.Necrosis,cyst formation and tumour nodules were common signs in this kind of glioma.All these gliomas had different extents of occupying effect and contrast-enhanced effect.MRI can demonstrate the situation of topographic anatomy of invasive glioma.Conclusions:Invasive glioma is a special clinical type of glioma which can be diagnosed with MRI before operation.MRI has intructional importance in the final diagnosis of invasive glioma.