颅内血管母细胞瘤MRI诊断

目的总结颅内的血管母细胞瘤的MRI表现,MRI对血管母细胞瘤的诊断价值。方法对探讨36例颅内血管母细胞瘤的MRI回顾性对比分析。其中男性,25例,女性,11例,年龄10～70岁,平均年龄35岁。36例均行MRI平扫 增强检查。结果36例病灶,10例位于右侧小脑半球,15例位于左侧小脑半球,3例位于小脑蚓部,1例位于四脑室,3例位于小脑延髓背侧交界处,1例同时累及两侧小脑半球,1例多发,1例位于右颞叶,1例位于左侧丘脑,29例呈类圆形,7例呈圆形。MRI表现为囊性者28例,平扫T1WI囊液呈低信号,T2WI呈高信号、壁结节T1WI为等信号,T2WI呈高信号。增强后囊腔不强化,壁结节明显强化。实性7例,平扫T1WI肿瘤呈低信号,可见流空的血管影,T2WI呈高信号,增强后病灶明显强化,1例单纯囊型。结论MRI检查是诊断血管母细胞瘤的有效方法,文中对几种类似的MRI表现的其他肿瘤作了鉴别诊断分析。

MRI diagnosis of intracranial hemangioblastoma

Objective To summarize the MRI findings of intracranial hemangio bl astoma, and to investigate the diagnostic value of MRI.Methods MRI findings were analyzed retrospectively in 36 cases of hemangioblastoma. In total 25 males and 11 females, with a mean age of 35 (10-70 years) were enrolled in the study. No n-contrast enhanced and enhanced scan were performed in all patients. Results T here was a wide distribution of lesions: lesions were found in right cerebellar hemisphere (n=10), left cerebellar hemisphere (n=15), cerebellar vermis (n=3), f ourth ventricle (n=1), dorsal boundary area between cerebellum and medullary bul b (n=3), right temporal lobe (n=1), left thalamus (n=1), and involving bilateral hemispheres of cerebellum (n=1). Diffuse and multiple lesions were revealed in 1 case. MRI demonstrated 28 cystic lesions with nodules, in which the content of the cyst depicting hypointense on T1WI and hyperintense on T2WI on non-contras t enhanced scan. The nodules were isointense on T1WI, and hyperintense on T2WI. There was no enhancement of the wall after the administration of the contrast ag ents. On the contrary, the nodule yielded distinct enhancement. Solid lesion was found in 7 cases, which was demonstrated hypointense on T1WI with blood flowing void effect, and hyperintense on T2WI. Apparent increase of signal intensity of the lesion was demonstrated in the 7 cases during contrast enhancement. Simple cyst was found in 1 case of hemangioblatoma. Conclusion MRI can be used as an ef fective method in the diagnosis and differential diagnosis of intracranial heman gioblastoma.