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颅内孤立性纤维瘤的MRI表现及误诊分析8例

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摘要 目的分析颅内孤立性纤维瘤(ISFT)的MRI表现及误诊病例,以提高MRI对该病的诊断水平。方法回顾2010年1月至2020年2月湖州市中心医院经术前MRI诊断及术后病理证实的8例ISFT患者影像及病理资料,分析肿瘤的信号特点、生长部位、形态大小及强化方式并总结其影像特点,分析误诊病例的误诊原因。结果8例ISFT均为单发,边界清楚,分叶状5例,椭圆形3例,直径2.8~13.9 cm。右侧额顶部2例,额部及枕部跨中线4例,小脑幕2例。肿瘤实性部分T_(1)WI及T_(2)WI序列上均呈等或稍低信号,5例肿瘤内T_(2)WI序列见高低混杂信号,形成“阴阳征”。4例肿瘤周围见明显水肿,6例肿瘤内部见流空血管影,DWI序列肿瘤信号受限。增强后肿瘤实质部分明显不均匀强化,其中5例肿瘤T_(2)WI序列上显示的低信号区明显均匀强化,囊变坏死区未见强化。3例肿瘤增强后见“脑膜尾征”。2例误诊为脑膜瘤,1例误诊为血管外皮细胞瘤。病理检查:肿瘤胶原纤维丰富,瘤细胞呈梭形,分布成束状及编织状。免疫组化:CD34(+)、CD99(+)、Vim(+)。结论ISFT少见,容易误诊,MRI具有一定特征,诊断及鉴别仍需依靠病理及免疫组化检查结果。
出处 《浙江医学》 CAS 2021年第10期1123-1126,共4页 Zhejiang Medical Journal
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