单发脑实质转移瘤的CT诊断与鉴别诊断(附34例分析)  

CT DIAGNOSIS OF SINGLE INTRACEREBRAL METASTATIC TUMOR(An Analysis of 34 cases)

作　　者：裴礼模 薛杭兴 

机构地区：[1]宜宾市第二人民医院影像科,四川宜宾644000

出　　处：《泸州医学院学报》2006年第1期30-32,共3页Journal of Luzhou Medical College

摘　　要：目的:探讨单发脑内转移瘤的CT表现,诊断与鉴别诊断。方法:34例经临床和手术病理证实的单发脑内转移瘤,均行CT平扫和增强扫描。原发肿瘤以肺癌最多见(61.8%),40岁以上32例(94.1%)。结果:转移瘤均位于皮质和皮质下区,好发于额顶叶。病灶直径在3cm以上者25例(78.1%)。平扫呈等或稍低、稍高密度,增强后病灶表现为两种形式:当肿瘤为实质性,呈均匀强化,占58.8%;当转移瘤内出现坏死囊变,则呈环形强化,表现薄壁或不规整厚壁强化。转移瘤主要需与胶质瘤、脑膜瘤和脑脓肿等鉴别。结论:掌握本病的CT表现特点,结合临床资料,对单发脑内转移瘤的诊断和鉴别诊断有重要意义。Objective： To investigate CT features in single intracerebral metastatic tumor and its diagnosis and differential diagnosis. Mefhods： 34 cases of single intracerebral metastasis proved by clinical operational and pathological findings were examined by plain CT scanning and enhanced CT scanning. Results： Metastasis usually involved in the cortical and subcortical area, were frequently found in the parietofrontal lobes. The lesions of 25 cases were more than 3cm in diameter（78.1% ）. The tumors were of iso - density, lower density or higher density on plain CT scan. The lesions presented two patterns after contrast medium administration：The solid tumors exhibited homogeneously enhancement （58.8 % ）. The necrotic cystic degeneration in metastasis exhibit ring- shaped enhancement with thin wall or irregularly thick wall enhancement. Metastasis should mainly be differentiated from glioma, meningioma and brain abscess. Conclusion： Mastering characteristics of this lesion aided by clinical data, we can make CT scan play an important role in the diagnosis and differential diagnosis of single intracerebral metastatic tumor.

关 键 词：脑内转移瘤 体层摄影术 X线计算机 

分 类 号：R739.41[医药卫生—肿瘤]