目的 分析MRI在鞍旁海绵状血管 瘤与脑膜瘤诊断价值。方法 回顾性分析 我院自2014年4月-2018年4月收治的鞍旁 海绵状血管瘤及脑膜瘤患者的临床资料及 MRI影像，分析不同性质鞍旁肿瘤的MRI 征像差异。结果 20例患者经手术病理明 确7例鞍旁海绵状血管瘤，13例鞍旁脑膜 瘤。MRI扫描均可明确病灶位置、大小、 形态、受累毗邻组织及其与周围毗邻组 织的结构关系。鞍旁海绵状血管瘤MRI扫 描，与脑白质比较T1WI等信号或稍低信号 表达，信号均匀，DWI等信号，MRI增强扫 描均可见明显强化，以稍低信号表达为 主。鞍旁脑膜T1WI病灶接近脑灰质信号， 为等信号或高信号；T2WI均提示等信号； DWI显示等信号或稍高信号；行MRI增强扫 均可见明显强化表达，可伴典型“脑膜尾 征”。结论 鞍旁海绵状血管瘤与脑膜瘤 MRI及DWI扫描信号表达差异明显，且鞍旁 脑膜瘤可见“脑膜尾征”，或可成为术前 鉴别鞍旁海绵状血管瘤与鞍旁脑膜

Objective To analyze the diagnostic value of MRI in parasellar cavernous hemangioma and meningioma. Methods The clinical data and MRI images of patients with parasellar cavernous hemangioma and meningioma treated in our hospital from April 2014 to December 2018 were retrospectively analyzed, and the MRI features of parasellar tumors of different natures were analyzed. Results In 20 cases of patients, 7 cases of parasellar cavernous hemangioma and 13 cases of parasellar meningioma were confirmed by surgical pathology. MRI scan could identify lesion location, size, shape and involved adjacent tissues and its structural relationship with the surrounding adjacent tissues. Compared with the white matter of the brain, MRI scan of the parasellar cavernous hemangioma showed equal signal or slightly low signal expression in T1WI with signal uniformity, and equal signal in DWI, and MRI enhanced scans showed significant enhancement mainly with slightly low signal expression. Parasellar meningioma lesions are close to the gray matter signal inT1WI (equal signal or high signal), and there was equal signal in T2WI and equal signal or slightly high signal in DWI, and MRI enhanced scan showed obvious enhanced expression, with typical "dural tail sign". Conclusion The signals expression of MRI and DWI scansare significantly different in the parasellar cavernous hemangioma and meningioma, and the "dural tail sign" can be seen in the parasellar meningioma, or it can be used as high-value basis to identify parasellar cavernous hemangioma and parasellar meningioma before operation, therefore it is worthy of further exploration.