目的 探讨后颅窝实性血管母细 胞瘤的MRI特征，提高其诊断水平。方法 回顾性分析15例经手术病理证实的后颅窝 实性血管母细胞瘤的MRI资料，总结其特 征。结果 15例均发生于后颅窝。11例为 全瘤实性肿块，4例为囊实性肿块，实性 为主。MRI上肿瘤实性部分呈长T1长T2信 号，15例均可见瘤体或瘤周流空血管影， 肿瘤周围轻、中度水肿。增强扫描11例实 性肿块全瘤明显强化，4例囊实性肿块为 实性部分明显强化，囊性部分不强化。结 论 后颅窝实性血管母细胞瘤的MRI表现具 有一定的特征，综合分析能提高其诊断准 确性。

Objective To study the MRI features of posterior fossasolid hemangioblastomas, in order to improve the diagnosis accurary. Methods The clinical data and MRI imaging of 15 cases with posterior fossa solid hemangiolbastomas proved were retrospectively reviewed, and summarize its characteristics. Results All of the 15cases occurred in the posterior fossa. 11 cases were solid tumors, and 4 cases were cystic-solid tumors. MRI on the solid part showed long T1 and long T2 signal, 15 cases showed the empty vessels around or in the mass with mild to moderate edema around . Enhanced scan in 11 cases of solid tumors was significantly enhanced, 4 cases of cystic- solid mass was obvious enhancement the solid part without cystic. Conclusion Certain MRI characteristics of posterior fossa solid hemangioblastomas were revealed,comprehensive analysis can improve its diagnosis accuracy.