小脑血管网织细胞瘤的MRI特征

目的 探讨小脑血管网织细胞瘤的MRI特征.方法 对经手术证实的32例小脑血管网织细胞瘤的MRI资料进行回顾性分析.采用T1WI、T2WI、液体衰减反转恢复成像(FLAIR)和增强扫描.结果 32例患者的病灶位于左小脑半球14例,右小脑半球11例,双小脑半球2例,上蚓部3例,下蚓部2例.MRI表现为囊壁结节型25例(78.1%),囊旁结节型3例(9.4%),实质型4例(12.5%).肿瘤的活性部分于FLAIR和T2WI呈高信号,增强后明显强化;T1WI肿瘤囊性部分呈均匀低信号、肿瘤壁结节呈稍低信号或等信号.结论 小脑血管网织细胞瘤有特定的发生部位及特征性MRI表现.MR对小脑血管网织细胞瘤的诊断具有较高的准确性,尤其是增强扫描对定性诊断及鉴别诊断具有重要的价值.

Image characteristic of cerebellar angioreticuloma on MRI

Objective To probe image characteristics of cerebellar angioreticuloma on MRI as well as its pathological characteristics. Methods 32 patients who had been proved cerebellar angioreticuloma by operation underwent a review using their MRI data. T1WI and T2WI, fluid-attenuated inversion recovery (FLAIR) and enhanced scanning method were involved. Results Among the 32 patients, 14 had lesions in left cerebellar hemisphere, 11 in right cerebellar hemisphere, 2 in both hemispheres, 3 in superior vermis cerebelli and 2 in inferior vermis cerebelli. On MRI, 25(78.1%) manifested nodules on cyst wall, 3 (9.4%) nodules beside the cyst, and 4 (12.5%) were solid. Viable part of the lesions displayed hyperintensity on FLAIR and T2WI and could be significantly enhanced; the cyst part displayed an even hypointenisty on T1WI, and nodules on the cyst manifested a slight hypointensity or iso-intensity. Conclusion Cerebellar angioreticuloma has a predilection for some certain locations and is characteristic on MRI, MRI is highly precise for diagnosing cerebellar angioreticuloma, especially with the enhanced scanning, which can play a vital role in qualitative diagnosis and differential diagnosis.