脑灰质异位症的影像学诊断

The Diagnosis and Clinical Imaging of Gray Matter Ectopic Symptom

目的 探讨脑灰质异位症的临床与影像表现特征。方法 回顾性分析 12例灰质异位症的临床和影像资料。结果 2 5岁以下青少年多发 ,无明显智力低下。顶部多见 ,其次为颞 ,枕区。单发病灶。MRI可清楚显示病灶 ,T1和T2加权像示病变呈等皮质信号 ,并伴随异常脑沟延伸到脑白质深处。质子密度加权像显示病灶更为清晰。CT平扫为一异常的等密度脑回样或团块状病灶 ,伴随脑沟向脑白质深处延伸 ,窄窗宽观察更为清楚。增强扫描病灶本身无强化。结论 脑灰质异位症临床与影像表现均有一定特征 ,CT平扫即可作出诊断。

Objective This article attempted to search into the clinical and imaging representative features in gray matter ectopic symptom. Methods To analyse retrospectively clinical and imaging data of 12 cases with gray matter ectopic symptom. Results We found that the age was below 25 years, the young who often occurred, and the male was more than the female. Grand mal epilepsy was its first symptom,their intelligence appreared no dictinct low. The parietal lobe came into sight many times, whereas the occipital and temporal region were in the mext place, the focus singly happened, which manifexted distinctly itself in MRI T1 and T2 WI entirely indicated the pathological change as an equal cortical signal, which was also accompanied with abnormal brain sulcus stretched for the depth of brain matter. The focus could be seen over clearly by using proton density. CT scanning made known the focus that looked like an abnormal equal density gyrus or shaped lump, and went with the brain sulcusstretched for the depth of white matter is was observed easily through narrow window width. If enhanced the scanning, the focus in itself made no strength. Conclusion The manifestation of clinic and imaging in gray matter ectopic symptom, which possessed of certain features, diagnosis can be done immediagely by CT level scanning. There is no doubt, CT is the first choice of the imaging observation. [