不同级别少突胶质细胞肿瘤的MRI表现

MRI appearances and pathological differentiation of tumor of the different grade of oligodendrocytes tumor

目的探讨不同级别少突胶质细胞肿瘤的MRI表现特点。方法回顾性分析33例少突胶质细胞肿瘤的MRI表现,并结合病理结果分析。结果均为单发病灶,其中Ⅱ级21例,Ⅲ级12例。肿瘤好发于幕上大脑白质区,以额叶最常见,63.6%病灶发生钙化,MRI上T2WI多呈高信号、T1WI像多呈等低信号、T2WI-FLAIR多呈高信号、DWI呈稍高信号,可见囊变、出血信号,增强后强化方式各异,可为轻中度强化或为明显强化。Ⅲ级病灶在部位、大小、囊变、占位效应、瘤周水肿、强化方式的上较Ⅱ级有一定的差异,而钙化及MRS未见明显差别。结论不同级别少突胶质细胞肿瘤的MRI表现上有一定差异,可提高分级的准确性,为临床诊断提供帮助。

Objective To investigate the MRI features of tumor of the different grade of oligodendrocytes tumor. Methods We retrospectively analysed of 33 cases of oligodendrocytes tumor imaging findings and combined with the pathological results. Results The lesions were solitary lesions, of which 21 were grade II and 12 were grade III. For tumor in supratentorial brain white matter, frontal lobe was the most common, and 63.6% was lesion calcification, MRI T2WI showed high signal on T1WI, much like a low signal, T2 WI-flair showed high signal on DWI showed slightly high signal, cystic degeneration, bleeding signal, enhancement in different ways, as mild to moderate enhancement or obvious enhancement. There were some differences in location, size, cystic change, space capsule, tumor edema and enhancement pattern of the lesions, while calcification and MRS were not significantly different. Conclusion The MRI features of different levels of glioma have some differences, which can improve the accuracy of grading, and provide the help for clinical diagnosis.