胼胝体病变的MRI诊断  

MRI Diagnosis of Corpus Callosum Lesions

作　　者：袁小平[1] 潘恒[1] 黄穗乔[1] 

机构地区：[1]中山大学孙逸仙纪念医院放射科,广东广州510120

出　　处：《继续医学教育》2017年第5期139-140,共2页Continuing Medical Education

摘　　要：目的探讨胼胝体病变的磁共振成像(MRI)影像表现,提高其鉴别诊断水平。方法对我院58例胼胝体患者的影像学表现进行回顾性分析,患者均有临床及手术病理结果证实。结果 58例,包括胼胝体肿瘤33例和非肿瘤性病变25例。肿瘤病变包括星形细胞瘤15例,少支胶质瘤6例,转移瘤6例,淋巴瘤3例,脂肪瘤3例;非肿瘤性病变25例,包括原发性胼胝体变性7例,可逆性胼胝体压部病变6例,脱髓鞘病变6例,弥漫性轴索损伤6例。胼胝体肿瘤MRI信号均匀或不均匀,有占位效应,增强不同程度强化,胶质瘤、淋巴瘤向两侧脑叶侵犯出现"蝴蝶征"有诊断价值。胼胝体非肿瘤性病变常有特定的临床病史及胼胝体好发部位、MRI信号特点。结论胼胝体病变的MRI表现有一定特征性,结合临床、病理,有利于分析、诊断胼胝体病变。Objective To discuss MRI diagnosis of corpus callosum lesions for definite clinical diagnosis. Methods A retrospective analysis was conducted in 58 cases which were confirmed by clinical diagnosis or operation and pathology in our hospital. Results 58 cases, including 33 eases of corpus callosum tumors and 25 cases of non-neoplastic lesions. Tumor lesions include 15 eases of astrocytomas, 6 cases of oligodendroglioma, 6 cases of metastatic tumor, 3 cases of lymphoma and 3 cases of lipoma; 25 cases of non-neoplastic lesions, including 7 cases of primary corpus callosum degeneration, reversible splenial lesions corpus callosum lesions in 6 cases, demyelinating lesions in 6 cases, 6 eases of diffuse axonal injury. Tumors involving corpus callosum presented as homogeneous or inhomogeneous signal intenity and obvious occupancy effect. The MR1 findings of enhanced MR scans were obvious enhancement, slight enhancement or no enhancement according to different pathological kinds of tumors. ＂Butterfly sign＂was the reflection that gliorrtas or lymphoma of corpus callosum invaded two sides of cerebral hemisphere and had important value for diagnosis. Corpus callosum non-neoplastic lesions often have a specific clinical history and the corpus callosum predilection site, MRI signal characteristics. Conclusion corpus callosum lesions have certain characteristic MRI imaging findings, combined with the clinical, pathological, beneficial help to analysis and diagnosis the disease.

关 键 词：胼胝体 磁共振成像 诊断显像 

分 类 号：R445[医药卫生—影像医学与核医学]