肺癌幕上脑转移瘤与血供关系的MRI研究

Study of Relation between MRI Findings of Supratentorial Metastasis of Lung Cancer and Blood Distribution

目的 :研究肺癌幕上脑转移瘤的MRI特征与血供的相关性。材料与方法 :搜集经病理证实的肺癌幕上脑转移瘤的MRI资料 2 0例 ,以脑血供解剖为基础 ,从断层像上观察瘤灶在脑内分布的规律性。结果 :2 0例中小细胞肺癌 6例 ,非小细胞肺癌 14例。幕上脑转移瘤共有 90个瘤灶 ,左侧 5 3个 (5 8 7% ) ,右侧 37个(41 3% )。单发 7例 ,多发 13例。位于皮质内或皮髓质交界处 83个 (92 2 % ) ,胼胝体 3个 (3 3% ) ,脑白质 4个 (4 5 % )。分属于大脑前动脉供血区 2 3个 (2 5 6 % ) ,大脑中动脉供血区 4 7个 (5 2 2 % ) ,大脑后动脉供血区2 0个 (2 2 2 % )。结论 :通过对本组病例的MRI研究 ,瘤灶以皮质内或皮髓质交界处和大脑前、中、后动脉供血区多见 。

Objective:To study the character and interrelationship between MRI findings of supratentorial metastasis of lung cancer and the blood distribution.Materials and methods:Twenty cases with pathologically proved supratentorial metastasis of lung cancer on plain and GD-DTPA enhanced MRI scanning,according to the transvers imaging,the location of the metastatic foci was studied on the basis of its blood distribution.Results:Twenty cases have 90 metastatic foci,83 foci occurred at cerebral cortex or subcortex,23 foci occurred at the area where the blood was supplied by the cerebral anterior artery and 47 foci occurred at the area by cerebral medial artery,and 20 foci occurred at the area supplied by the cerebral posterior artery.Conclusion:Metastatic foci often occurred at cerebral cortex and subcortex and most of them was distributed at the area the blood was supplied by cerebral anterior?medial or posterior artery,particularly at the area where the blood was supplied by cerebral medial artery.