摘要
目的：探讨中枢神经细胞瘤（CNC）及脑室外神经细胞瘤（EVN）的CT及MR表现。资料与方法：回顾性分析经手术及病理证实的7例CNC及2例EVN CT及MR表现，分析其发病部位，肿瘤的形状、边界、信号强度、囊变、钙化，肿瘤内流空血管及强化特点。结果：7例CNC均位于侧脑室内，透明隔移位或显示不清，肿瘤呈分叶状，CT平扫呈不均匀性稍高密度，MR扫描T1WI以等、略低信号为主，T2WI以等信号为主，5例病变内部或边缘可见大小不等囊腔，6例可见条形、粗大钙化，4例肿瘤内可见流空血管影，增强扫描病变均呈不均匀性轻中度强化；2例EVN主体位于额、顶叶，分叶状或不规则形，边界不清，肿瘤呈囊实性，囊壁厚薄不均，可见壁结节，增强扫描呈中度或明显不均匀性强化，均见瘤内出血，1例可见条状血管影。结论：CNC具有较典型的CT及MR征象，EVN常呈囊实性，合并出血、壁结节多见，年轻患者脑实质内的肿瘤具有这些征象时需考虑EVN可能。
Abstract
Objective: To study the CT and MRI characteristics of central neurocytoma(CNC) and extraventricular neurocytoma(EVN)． Materials and Methods: The imaging findings of 7 CNC and 2 EVN were analyzed retrospectively, and all cases were proved by operation and pathology. The lesions’ location, shape, size, boundary, signal intensity, cystic degeneration, calcification, enhancement characteristics, and the presence of flow-void sign were analyzed. Results: Seven CNC tumors were all located in the lateral ventricles, and the septum pellucidum were not shown or displaced． The lobular tumors are all hyperintense on CT plain scan, hypointense or isointense on T1WI and isointense on T2WI, with different size of cystic degeneration in 5 cases, striatal or gross calcification in 6 cases, and flow-void sign in 4 cases. The tumors demonstrated mild to moderate inhomogeneons enhancement after contrast administration． Two EVN centered in frontal or parietal lobe, with irregular or lobular shapes and ill-defined boundary. The 2 cases were all cyst-solidary mass, with uneven cystic wall and mural nodule, and demonstrated moderate to intense inhomogeneons enhancement after contrast administration. Two cases all demonstrated haemorrhage within the tumor, and one case presented flow-void sign. Conclusion: CNC are charicteristic on CT and MRI． EVN should be considered when a cerebral parenchymal tumor with cystic necrosis, hemorrhage and mural nodule is encountered in younger patients.
关键词
脑肿瘤 /
神经细胞瘤 /
体层摄影术 /
X线计算机 /
磁共振成像
Key words
Brain neoplasms /
Neurocytoma /
Tomography /
X-ray computed /
Magnetic resonance imaging
唐乐梅;宁殿秀;牛田力;郑程程;伍建林;郎志谨;苗延巍.
中枢神经细胞瘤及脑室外神经细胞瘤的CT及MR表现[J]. 中国临床医学影像杂志. 2013, 24(5): 305-308
TANG Le-mei;NING Dian-xiu;NIU Tian-li;ZHENG Cheng-cheng;WU Jian-lin;LANG Zhi-jin;MIAO Yan-wei.
CT and MRI findings of central neurocytoma and extraventricular neurocytoma[J]. Journal of China Clinic Medical Imaging. 2013, 24(5): 305-308
中图分类号：
Ｒ739.41
R814.42
Ｒ445.2
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