MRI对颅内脉络丛乳头状瘤的诊断价值

The value of MRI in diagnosis of choroid plexus papilloma

目的:探讨MRI对颅内脉络丛乳头状瘤的诊断及鉴别诊断价值。方法:回顾性分析经手术病理证实的脉络丛乳头状瘤6例,均行MRI平扫及增强扫描。结果:6例中位于右侧脑室后角、左颞叶、右颞叶各1例,第四脑室3例;其中引起脑积水3例。肿瘤多呈圆形或类圆形,病灶MRI T1WI为等信号3例,低信号2例,等低信号1例;T2WI高信号2例,等低信号1例,等信号1例,低信号1例,混杂信号1例。增强后病灶多明显强化,内见细小颗粒状或桑椹样不均匀强化区。结论:MRI检查可清楚地显示脉络丛乳头状瘤部位及表现特征,可为其诊断及鉴别诊断提供重要信息。

Objective: To evaluate the value of magnetic resonance imaging (MRI) in diagnosis of intracranial choroid plexus papilloma (CPP). Methods: A total of six cases with CPP who were confirmed by surgery and pathology were retrospectively analysed by MRI. Results: In these six patients, there were three lesions in the fourth ventricle, one in the posterior horn of the right ventricle, one in the left temporal lobe and the last in the right temporal lobe. T1WI images showed equal signal in 3 cases, low signal in 2 cases, equal- low signal in 1 case; T2WI images showed high signal in 2 cases, equal- low signal in 1 case, equal signal in 1 case, low signal in 1 case, mixed signal in 1 case. Most of tumors presented strong homogenous enhancement on enhanced MRI.The characteristic enhancement of small granule or mulberry heterogeneous enhancement could be observed in some cases. Conclusion: MRI has high value in diagnosis of intracranial CPP by providing important information of MR characterization.