脑膜血管外皮细胞瘤的MRI诊断

目的脑膜血管外皮细胞瘤(meningeal hemangiopericytom a,M-HPC)属于血管外皮细胞瘤(HPC)范畴,在临床上属于少见的脑膜肿瘤,文中探讨M-HPC的MRI特征,以提高对该病的诊断水平。方法回顾性分析12例经手术、病理证实的M-HPC患者的MRI资料,总结M-HPC的MRI诊断要点及相关鉴别诊断。结果患者肿瘤均为单发病灶,发生部位:肿瘤位于大脑镰4例、蝶骨嵴3例、鞍上1例、跨中、后颅窝生长1例、鞍旁2例、肿瘤突入颞下窝、位于顶叶表浅部位1例。肿瘤形状:10例肿瘤呈不规则分叶状,2例呈类圆形。MRI特点:9例呈混杂等长T1等长T2信号,病灶内可见血管流空信号及多发坏死囊变区,增强实质部分显著强化;3例呈等T1等T2信号,增强显著均匀强化。9例与硬膜窄基底相连,可见硬膜尾征;5例可见瘤周水肿,占位效应明显;7例进行扩散加权成像(diffusion weighted image,DWI),表现为低信号或混杂等偏低信号;2例进行磁共振波谱(magnetic resonance spectroscopy,MRS)分析和磁共振灌注成像(perfusion weightedimaging,PWI...

MRI diagnosis of meningeal hemangiopericytoma

Objective Meningeal hemangiopericytoma (M-HPC), one of the hemangiopericytomas (HPC), is a rare meningioma clinically. This study aimed to explore the MRI features of M-HPC and improve the diagnosis of the disease. Methods We retrospectively reviewed the MRI findings of 12 cases of M-HPC confirmed by surgical pathology, and analyzed the key MRI features and differential diagnosis of the disease. Results All the 12 M-HPC cases were singular lesion, 4 located in the cerebral falx, 3 in the sphenoidal crest, 1...