摘要
目的:研究中枢神经细胞瘤的影像学特征,提高其术前诊断准确率。方法:回顾分析15例经病理证实的中枢神经细胞瘤的CT、MRI表现。结果:15例中14例位于幕上脑室内,1例位于左额叶并累及胼胝体。肿瘤均呈不规则分叶状。CT上,肿块呈等或稍高密度,其中7/12(58.3%)可见点、片状或条带状钙化。MR平扫,2例肿瘤呈实体性,余均为囊-实混合性,肿瘤实体部分与灰质相比于T1WI呈等信号,T2WI等或稍高信号;囊性部分表现为肿瘤边缘或内部多发的"蜂窝"状或"丝瓜瓤"样脑脊液信号区。增强检查,肿瘤的实体部分、囊壁及分隔均呈中度至明显强化。结论:虽然中枢神经细胞瘤的发生率较低,但其在发病部位、影像学表现等方面具有一定的特征性,结合患者年龄及临床表现,术前可对多数病例做出定性诊断。
Objective： To investigate the CT and MRI features of the central neurocytoma （CNC） and improve preoperative diagnosis. Methods：CT and MRI appearances in 15 cases of CNC with pathology- proved were analyzed retrospectively. Results：Among the 15 cases, the tumours in 14 cases were located in supratentorial ventricles,while one was located in the left frontal lobe with corpus callosum invaded.On CT scan, the tumours appeared iso-or slightly high density. Dot or mass calcifications could be seen in 7/12 （58.3%） of tumours.On pre-contrast MR scan, 2 of the tumours showed solid pattren while the rest of the turnouts appeard mixed cystic-solid pattern, the solid part showed iso-T1 and iso-/hyper-T2 signal intensity compared with gray matter. The cystic part showed ＂honeycomb＂ or ＂vegetable sponge＂ patternlike areas with long T1 and long T2 signal intensity which were similar to CSF. On post-contrast MR scan, the solid part, cystic wall and septa demonstrated moderate or obvious enhancement. Conclusion：Although the incidence of CNCs is rare, preoperative diagnosis can be made in most of cases due to the specific location, imaging features, and clinical data.
出处
《天津医科大学学报》
2008年第1期68-71,共4页
Journal of Tianjin Medical University
