胼胝体区胶质瘤的MRI诊断

目的探讨胝胝体区胶质瘤的MRI表现,提高对该类肿瘤的诊断与鉴别诊断能力.材料与方法对34例胼胝体区胶质瘤行MRI平扫及增强扫描,并与病理结果对照.结果胼胝体区胶质瘤呈长T1长T2异常信号,信号强度均匀或不均匀,有明显占位效应,增强扫描可出现不同程度的增强.部分胼胝体区胶质瘤向两侧脑叶侵犯,出现“蝴蝶征”,此征象有助于定位诊断.结论胼胝体区胶质瘤是颅内特殊部位的肿瘤,MRI对其诊断和鉴别诊断具有重要临床价值.

MRI Diagnosis of Cerbral Giioma Involving Corpus Caliosum

Purpose: To investigate the MRI manifestations of cerebral gliomas involving corpus callosum, and to improve the ability of di agnosis and differential diagnosis. Materials and Methods: Thirty-four cases of cerebral glioma involving corpus callosum were undergone plain and Gd-DTPA-enhanced MR scans. The MRI findings of these gliomas were correlated with pathology. Results: Cerebral gliomas in volving ocrpus callosum presented as long T_1 long T_2homogeneous or inhomogeneous signal intensity and obvious mass effect. The MRI find ings of Gd-DTPA-enhanced MR scans were obvious enhancement, slight enhancement or no enhancement according to different pathological kinds of gliomas. "Butterfly sign" was the reflection that gliomas of corpus callosum invaded two sides of cerebral hemisphere and had impor tant value for diagnosis. Conclusions: Cerebral gliornas involving corpus callosum are intracranial tumors with special location. MRI has sig nificant clinical value in diagnosis and differential diagnosis of the tumour.