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目的探讨颅内单发脑转移瘤的影像特征。方法收集我院经手术或临床确诊颅内脑转移瘤49例,分析其MR影像特征。结果在24例单发脑转移瘤病例中,病灶分布于幕上者16例,其中13例位于皮髓质交界;肿瘤实体直径>3.0cm者14例,轻度水肿10例;环形强化14例,其中皮质侧显著增强12例,毛刷状征象12例。结论肿瘤的发生部位、肿瘤与瘤周水肿比例,增强扫描表现等征象有助于单发脑转移瘤的影像诊断。
Objective To explore the imaging features of intracerebral solitary brain metastases. Methods 49 cases of intracranial brain metastases confirmed by surgery or clinic in our hospital were collected and their MR imaging characteristics were analyzed. Results In 24 cases of solitary brain metastases, 16 cases were found with lesions distributed on the screen, of which 13 cases were located at the junction of cortex and medulla; 14 cases with tumor diameter> 3.0cm and 10 cases with mild edema; 14 cases with ring enhancement , Of which 12 cases were significantly enhanced cortical side, brush-like signs in 12 cases. Conclusion The location of the tumor, the ratio of tumor to peritumoral edema and the enhancement of the scan performance are helpful for the imaging diagnosis of solitary brain metastases.