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目的分析颅内胶质肉瘤的MRI影像特征,以及这些影像特征在与颅内其他常见原发肿瘤鉴别诊断中的意义。资料与方法回顾性分析本院1998年4月至2011年4月9例经病理证实的胶质肉瘤患者的MRI影像表现、病理结果及临床表现。患者年龄30～66岁,平均48岁,所有患者均经手术切除及病理证实。9例患者均行常规T1WI、T2WI及增强扫描,部分患者行液体衰减反转恢复(FLAIR)、扩散加权成像(DWI)、扩散张量成像(DTI)及扩散张量纤维束成像(DTT)扫描。结果本组9例胶质肉瘤均发生在幕上。MRI平扫,肿瘤表现为边界清楚、均匀性或囊实性占位,伴有中重度水肿。T1WI上多呈低信号,T2WI上多呈高信号,FLAIR图像上,4例表现为高信号。增强扫描,多为明显环形强化。结论胶质肉瘤影像学表现具有一定特征,MRI能清晰显示病变,但与颅内其他原发肿瘤鉴别较困难,多序列成像有助于其鉴别诊断及预后的估计,确诊仍需病理检查。
Objective To analyze the MRI features of intracranial glioma and the significance of these features in differential diagnosis with other common primary tumors in the brain. Materials and Methods Retrospective analysis of MRI findings, pathological findings and clinical manifestations of 9 pathologically confirmed glioma sarcomas from April 1998 to April 2011 in our hospital. Patients aged 30 to 66 years, mean 48 years old, all patients were surgically removed and confirmed by pathology. All patients underwent conventional T1WI, T2WI and contrast-enhanced scanning. Some patients underwent FLAIR, DWI, DTT and DTT . Results The group of 9 glioma sarcoma occurred in the curtain. MRI plain scan, the tumor showed a clear boundary, uniform or cystic solid occupying, accompanied by moderate and severe edema. T1WI was mostly low signal, mostly high signal on T2WI, FLAIR images, 4 cases showed high signal. Enhanced scan, mostly ring enhancement. Conclusion Gliosarcoma has certain imaging features. MRI can clearly show the lesions. However, it is difficult to identify with other primary tumors in the brain. Multi-sequence imaging is helpful to the differential diagnosis and prognosis estimation. The pathological examination is still required.