肺癌单发脑转移瘤的磁共振表现  

MRI Manifestations of Solitary Brain Metastases of Lung Cancer

作　　者：卢金花[1] 舒锦尔[1] 刘江[1] 盛三兰[1] 蒋春景[1] 

机构地区：[1]金华市中心医院放射科,浙江321000

出　　处：《放射学实践》2007年第7期691-693,共3页Radiologic Practice

摘　　要：目的:探讨肺癌单发脑转移瘤(SBM)的MRI表现,提高对单发脑转移瘤的诊断准确性。方法:回顾性分析经手术病理和临床证实的39例肺癌单发脑转移瘤的MRI表现,分析单发瘤体发生的部位、大小、形态、瘤体出血、瘤周水肿程度和瘤体的强化特点。结果:39个SBM,发生于幕上32例,其中31例瘤体位于皮质和皮质下区,7例位于幕下。增强扫描示病灶呈结节状强化18例,环状强化5例,囊实性强化16例。肺腺癌转移瘤内出血4例(4/5),肺鳞癌脑转移瘤出现囊变或囊实性强化11例(11/21)。中重度水肿大多出现在≥2cm的实性或囊实性强化的瘤体(22/39)中。结论:肺癌单发脑转移瘤的MRI表现具有一定的特征性,MRI增强扫描对诊断单发脑转移瘤有重要价值。Objective：To study the MRI characteristics of solitary brain metastasis （SBM） of lung cancer, and to improve the diagnostic accuracy of SBM. Methods： MRI findings of 39 patients with SBM of lung cancer proven by pathology and clinical follow-up were studied retrospectively. The location, size, shape, intra-tumoral hemorrhage, peri-tumoral edema as well as findings after contrast enhancement were analyzed. Results：Of the 39 cases of SBM having pre contrast MRI, 32 lesions were located at the supra-tentorial regions,with 31 lesions at the cerebral cortex and subcortical regions. 7 lesions located at the infratentorial regions. After contrast-enhancement,various patterns were revealed,including nodular enhancement （18 lesions）, ring-like enhancement （5 lesions）, enhanced solid-cystic mass （16 lesions）. In all of these metastases, 4 of the 5 cases with SBM of pulmonary adenocarcinoma showed intra-tumoral hemorrhage foci. 11 of the 21 cases with SBM of pulmonary squamous carcinoma had cystic change or solid-cystic enhancement. 22 of the 39 SEM which were larger than 2cm with solid or cystic-solid enhancement showed moderate to marked peri tumoral edema. Conclusion：SBM of lung cancer had some characteristic features in contrast enhanced MR images, which showed important value in the diagnosis and differential diagnosis of SBM of lung cancer.

关 键 词：磁共振成像 脑肿瘤 肺肿瘤 

分 类 号：R734.2[医药卫生—肿瘤] R739.4[医药卫生—临床医学]