摘要
目的分析囊性脑膜瘤的MRI表现。方法依照Nauta分型分析44例囊性脑膜瘤的MRI表现。结果 44例囊性脑膜瘤中,NautaⅠ型9例,Ⅱ型5例,Ⅲ型2例,Ⅳ型16例,混合型(包括以上4种类型中的2种或2种以上类型)12例。病理类型以纤维型、上皮型多见。MRI多表现为实性肿物伴有大小不等的囊变区,囊性部分均表现为长T1长T2信号,FLAIR呈低或稍低信号,DWI为低信号;实性部分以等或长T1长T2信号为主,FLAIR呈等或高信号,DWI为等或高信号;增强扫描中实性部分呈中度或明显强化,其中29例均匀强化、15例呈不均匀强化,27例囊壁强化。结论囊性脑膜瘤的MRI表现具有一定特征性,对临床诊断和治疗有一定的指导意义。
Objective To observe MRI features of cystic meningioma. Methods MRI findings of 44 patients with patho logically proved cystic meningioma were reviewed according to Nauta types. Results In 44 patients, 9 tumors were Nauta Ⅰ, 5 were Nauta Ⅱ , 2 were Nauta Ⅲ , 16 were Nauta Ⅳ, and 12 were mixed type （included at least two kinds of Nauta types）. Fibroblastic and endotheliomatous meningiomas were common. The cystic part of most tumors were parenchyma- tous, and showed long T1 and long T2 signal , low or slightly low signal intensity on FLAIR sequence, and low signal in- tensity on DWI. The solid part of tumors were mostly equal or long T1 and long T2 signal, equal or high signal intensity on FLAIR and DWI. After injecting of contrast agent, the solid part of the tumors showed moderate or marked enhancement, with homogeneous enhancement in 29 and heterogeneous enhancement in 15 patients. The wall of the cystic part enhanced in 27 patients. Conclusion Cystic meningioma has characteristic MRI features, which usually contribute to clinical diagno sis and treatment.
出处
《中国医学影像技术》
CSCD
北大核心
2012年第11期1957-1960,共4页
Chinese Journal of Medical Imaging Technology
关键词
脑膜瘤
磁共振成像
Meningioma~ Magnetic resonance imaging
