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原始神经外胚层肿瘤的CT与MRI特征并文献复习 被引量:7

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摘要 目的:探讨原始神经外胚层肿瘤(primitive neuroectodemal tumors,PNET)的CT与MRI特征,提高对本病的认识。方法:回顾性分析经病理证实的9例PNET的CT、MRI表现,并与病理对照。结果:①中枢性PNET 2例,影像学表现为颅内幕上较大肿块,位于额叶、颞叶,多呈类圆形,边界清晰,密度或信号不均匀,可见囊变坏死区,其中1例见钙化,肿瘤周围水肿较轻或不明显,增强扫描肿瘤实质部分不均匀强化,囊变区不强化。②外周性PNET 7例,其中发生于肩胛骨1例、肾脏2例、腹膜后2例、胸腔1例、原发于椎管内1例,影像表现为较大软组织肿块,边界不清,密度不均匀,内可见囊变坏死区,钙化未见,邻近骨质破坏1例,增强扫描肿瘤实质不均匀强化。所有患者免疫组化至少有1种神经元标记物阳性表达。结论:PNET影像学表现具有一定特点,但缺乏特异性,CT和MRI能较好显示肿瘤的内部结构、明确肿瘤的范围,有助于本病的鉴别诊断及手术评估。
出处 《中国中西医结合影像学杂志》 2014年第2期181-183,共3页 Chinese Imaging Journal of Integrated Traditional and Western Medicine
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