颅内血管母细胞瘤MRI诊断

MRI Diagnosis of Intracranial hemangioblastoma

目的分析颅内血管母细胞瘤MR影像表现,提高诊断准确率。方法收集手术及病理证实的23例颅内血管母细胞瘤患者的资料进行分析,23例均行常规MRI平扫、DWI及增强扫描。结果小脑半球9例,小脑蚓部6例,第四脑室4例,大脑半球4例;3例为多发,20例为单发。大囊小结节型共14例(61%),囊腔大,结节小,增强扫描呈典型的"亮泡征";单纯囊型共4例(17%),囊液信号均匀,囊壁无强化;实质型共5例(22%),T1WI上呈低信号,T2WI及FLAIR上均呈高信号,DWI为低信号,ADC图上为高信号,平均ADC值为1.59±0.18×10-3mm2/s,2例瘤内、3例瘤周可见线条状流空血管影,增强扫描肿瘤显著强化。结论颅内血管母细胞瘤有较特征性的MR表现,术前MR检查有重要的临床价值。

Objective To analyze the MRI features of intracranial hemangioblastoma to raise the accuracy rate of diagnosis. Methods The data on 23 cases of intracranial hemangioblastoma whose diagnosis was verified by surgery and pathology were analyzed. Routine plain MRI scan, DWI and enhancement scanning were carried out in all the 23 cases. Results Cerebellar hemisphere lesion was found in 9 cases,ver- mis cerebellum lesion in 6 cases, fourth ventricle Lesion in 4 cases and cerebral hemisphere lesion in 4 cases. Of these cases, multiple lesions were found in 3 and single lesion in 20. Different types of hemangioblastomas had different signal features： big cysts with small nodules in 14 cases（61% ） ,cystic type in 4 cases（ 17% ） and sulid type in 5 eases（22% ）. The mean ADC value was 1.59±0.18×10^-3mm^2/s. The intratumorous blood vessel flow - void signals were visible in 2 cases and the peritumomus in 3 cases. Conclusions Intracranial hemangin-blastoma has a more characteristic appearance. Preoperative MR examination is of important clinical value.