脑部毛细血管瘤MRI表现

Magnetic resonance imaging findings of capillary hemangioma in the brain

目的探讨脑内毛细血管瘤的MRI表现,提高对脑内毛细血管瘤的认识。方法对经MR检查及手术病理证实的脑内毛细血管瘤6例进行总结及分析,分析其MRI特征并与病理结果对照。结果6例脑内毛细血管瘤,分别位于脑桥、延髓、左右小脑半球、右侧颞叶、左侧额叶各1例;3例有亚急性出血,2例呈囊实变,1例为实性,MRI信号均不均匀;增强扫描6例病灶实体部分均显著不均匀强化,境界清楚;5例病灶实体内可见点状及细条状未强化分隔,1例可见"血管网";3例可见引流血管与病灶相连。结论MRI对脑部毛细血管瘤有较高的诊断价值。

Objective To investigate the magnetic resonance imaging （MRI） findings of capillary hemangioma in the brain to improve the diagnosis of capillary hemangioma. Methods The MRI findings were analyzed in 6 patients with pathologically confirmed capillary hemangioma in the brain to define the characteristic MR/features of capillary hemangioma. Results In the 6 patients, the capillary hemangiomas were located in the pons （n=1）, bulbus medullae （n=1）, bilateral eerebellar hemisphere （n=1）, right temporal lobe （n=1） or left frontal lobe （n=1）. Three patients had subacute hemorrhage, 2 had cystic degeneration and 1 had solid tumors, all shoeing heterogeneous MRI signals. Contrast-enhanced MR scans revealed marked heterogeneous enhancement with clear boundaries of the tumor parenchyma, where spots and thin strips without enhancement were seen in 5 cases; vascular network was seen in 1 case. Drainage vessels connected to the lesions were found in 3 cases. Conclusion MRI has a high diagnostic value for intracranial capillary hemangioma.