胼胝体区肿瘤的MRI诊断

Diagnosis of corpus callosum region tumors by MRI

目的:观察不同胼胝体区肿瘤在MR I上的表现,总结其影像学特征进行诊断和鉴别。方法:收集并观察我科就诊的23例胼胝体区肿瘤MR I及增强影像,与病理诊断做对照分析,总结各种肿瘤的影像学特点。结果:胼胝体区胶质细胞瘤居多,边界不清,增强效应不明显。胶质母细胞瘤及胶质肉瘤多向双侧额叶内侧浸润,可呈典型的“蝴蝶征”。脂肪瘤呈短T1长T2信号影,脂肪抑制扫描可有效鉴别。淋巴瘤常呈圆形信号影,瘤周水肿相对少。结论:MR I可有效诊断和鉴别胼胝体区肿瘤,为手术切除肿瘤提供重要的指导作用。

Objective： To observe the manifestations of different corpus callosum region tumors, and to explore their features for diagnosis and differential diagnosis. Methods： Comparative analysis was performed between MRI and pathologic diagnosis after magnetic resonance images of 23 eases were collected and observed to find their radiologieal features, Results： Most of the corpus eallosum region tumors were astroeytomas. Their mass effect was not obvious and few were contrast - enhanced. Most of glioblastomas into bilateral frontal lobes and were manifested as classic ＂butterfly sign＂. Lipoma was manifested as short T1 and long T2 signals on MRI, and fat - inhibition image was significant in diagnosis. Lymphoma had circle - shaped signal and the peri - tumor edema was relatively little. Conclusion： Corpus eallosum region tumors can be diagnosed by MRI, which may be helpful for the surgical excision.