横纹肌样脑膜瘤的MR表现与病理对照分析
MRI and Pathological Features of Rhabdoid Meningioma
李润楠 1黄安康 1陈振 1皮厚山 1许尚文1
作者信息
- 1. 联勤保障部队第900医院放射诊断科(福建 福州 350025)
- 折叠
摘要
目的 分析横纹肌样脑膜瘤(RM)的MRI征象,并与病理诊断对照,提高对该肿瘤的术前诊断水平.方法 回顾性分析经病理证实的8例横纹肌样脑膜瘤的资料,包括临床表现、MRI表现(平扫、增强及DWI)、病理特征等.结果 8例患者中,5例为女性,3例为男性,年龄41-73岁,中位年龄59岁;8例均为单发,形态不规则分叶状.3例位于桥小脑角区,2例位于鞍上区,2例位于颞顶部,1例位于额部.3例病灶内见囊变、坏死区,5例为实性.3例可见轻度脑水肿,2例侵犯临近颅骨内外板;MR平扫实性部分T2WI稍高信号,T1WI等低信号,ADC值略减低,DWI较高信号;MRI增强扫描8例均呈明显强化,动态曲线呈速升平台型,4例可见较典型的脑膜尾征.2例行MRS均显示病灶区Cho峰显著升高,NAA明显减低或缺失,并可见特征性的Ala峰.结论 RM的MRI表现具有一定的特征性,术前综合分析病灶的MRI特征表现,能提高诊断正确率.
Abstract
Objectie To analyze the MRI manifestations and pathological features of rhabdoid meningioma,and to improve the accuracy of diagnosis.Methods A retrospective analysis was conducted on 8 cases of rhabdoid meningioma,including clinical symptoms,plain and enhanced MRI findings,pathological features,etc.Results Among the 8 patients,5 female sand 3 males,aged 41-73 years,with a median age of 59 years;all 8 cases were solitary and irregularly lobulated in shape.3 cases were located in the cerebellopontine angle area,2 cases in the suprasellar area,2 cases in the temporal parietal region,and 1 case in the frontal region.3 cases showed cystic changes and necrotic areas within the lesions,while 5 cases were solid.3 cases showed mild cerebral edema,and 2 cases invaded the adjacent inner and outer plates of the skull;on MR plain scan,the solid part showed slightly higher signal intensity on T2WI,lower signal intensity on T1WI,slightly decreased ADC value,and higher signal intensity on DWI;all 8 cases showed significant enhancement in MRI enhanced scans,the dynamic curve shows a rapid rise platform type,and 4 cases showed typical meningeal tail sign.MRS showed a significant increase in Cho peak and a significant decrease or absence of NAA,and the characteristic Ala peak can be seen.Conclusion The MRI manifestations of RM have certain characteristics,and preoperative comprehensive analysis of the MRI features of the lesion can improve the diagnostic accuracy.
关键词
脑膜瘤/横纹肌样/磁共振成像/病理Key words
Meningioma/Rhabdoid/Magnetic Resonance imaging/Pathology引用本文复制引用
出版年
2025
NETL
NSTL
万方数据