小脑血管母细胞瘤的MRI表现分析

Analysis of the MRI Findings of Cerebellar Hemangioblastomas

目的探讨小脑血管母细胞瘤的MRI表现。方法对经手术病理证实为小脑血管母细胞瘤31例患者临床资料进行回顾性分析,均行MRI平扫和增强扫描,分析影像学表现。结果 23例大囊小结节型为类圆形囊性包块,正常脑实质有清晰分界;囊液TI低信号,T2高信号;囊壁TI等信号,T2高信号;14例肿周存在高信号水肿;FLAIR上稍高信号。增强扫描显示,瘤内结节均明显强化,囊液无强化。6例实质型8个肿块,呈规则团状分布,与正常脑实质无清晰分界,瘤周存在水肿;TI低信号,T2高信号,FLAIR上为高信号,增强扫描显示,肿瘤明显强化,病灶中囊性坏死区域未见强化。2例单纯囊型,TI等信号,T2低信号,FLAIR等信号,增强扫描未见明显强化。结论 MRI是临床诊断小脑血管母细胞瘤重要影像学方式,在疾病定性诊断中具有较高的应用价值。

Objective To investigate the MRI findings of cerebellar hemangioblastomas. Methods The clinical data of 31 patients with cerebellar hemangioblastomas confirmed by surgery and pathology were retrospectively analyzed. All patients underwent MRI plain scan and enhanced scan. The imaging findings were analyzed. RReessuullttss 23 cases of big cyst and small nodule type were quasi-circular cystic masses and the normal brain parenchyma had clear boundaries; The cyst fluid TI showed low signals while T2 showed high signals; Cyst wall TI showed equal signals while T2 high signals; There were high signal edemas around the masses in 14 cases; There were slightly higher signals on FLAIR. Enhanced scan showed that the intratumoral nodules were significantly enhanced and the cystic fluid was not enhanced. In 6 cases of solid type, 8 masses distributed in regular clumped shape and had no clear boundaries with normal brain parenchyma. There were edemas around the tumors; TI showed low signals while T2 showed high signals. There were high signals on FLAIR. Enhanced scan showed that the tumors were significantly enhanced and the cystic necrosis regions in the lesions were not enhanced. 2 cases were simple cystic type. TI showed equal signals while T2 showed low signals. There were equal signals on FLAIR. Enhanced scan showed no significant enhancement. Conclusion MRI is an important imaging method of clinical diagnosis of cerebellar hemangioblastomas and it has higher application value in qualitative diagnosis of disease.