含脂肪节细胞神经瘤的影像学表现与病理对照

doi:10.6040/j.issn.1671-7554.0.2018.280

摘要/Abstract

摘要： 目的总结含脂肪节细胞神经瘤(FCG)的影像学特征。方法回顾性分析经手术病理证实9例FCG影像学表现,均行CT平扫及增强扫描,其中4例行MRI平扫及增强扫描。结果 9例均为单发,后下纵隔及腹膜后各4例,右侧肾上腺1例。CT平扫表现为边界清楚含脂肪的混杂密度影,CT值约为-120.7~-43.4 HU;6例局限于肿块的周边,其余呈结节状或片状弥漫性分布。瘤内脂肪组织在T₁WI和T₂WI上呈高信号,压脂相上其信号变为低信号。神经组织在CT平扫上呈软组织密度影,在MRI T₁WI上呈稍低信号,在T₂WI上呈稍高信号;CT增强扫描5例肿块呈明显强化,轻中度强化各2例;在MRI增强扫描上轻度强化3例,明显强化1例。5例腹部肿块CT和(或)MRI三期增强扫描呈渐进性强化特征。结论节细胞神经瘤内脂肪存在是一种少见表现,通过CT值测量和MRI压脂相可明确其内脂肪的存在。了解该种现象,CT和(或)MRI多期增强扫描结合其好发部位可提示FCG诊断。

关键词: 脂肪, 节细胞神经瘤, 磁共振成像, 体层摄影术,X线计算机

Abstract: Objective To summarize the imaging features of fat-containing ganglioneuroma(FCG). Methods The imaging manifestations of 9 cases of FCG confirmed pathologically were reviewed. All cases received unenhanced and enhanced CT scanning, 4 of whom underwent unenhanced and enhanced MRI scanning. Results The ganglioneuromas were singular in all of the 9 cases, including 4 in the posterior mediastinum, 4 in the retroperitonium and 1 in the right adrenal gland. They all presented well-defined fat-containing heterogeneous masses on unenhanced CT images, and the CT values of fatty portion ranged from -120.7 to -43.4 HU. The fat was focalized around the mass in 6 cases, and diffused as patches or nodules in the other 3 cases. The intratumoral fat was verified by fat-suppressed T₁WI and/or T₂WI. The neural portions presenting soft-tissue density showed slightly low signals on T₁WI and slightly high signals on T₂WI, 山东大学学报 (医学版)56卷12期 -张丽红,等.含脂肪节细胞神经瘤的影像学表现与病理对照 \=-which were slightly(n=5), moderately(n=2), and obviously(n=2)enhanced on enhanced CT, and slightly(n=3)and obviously(n=1)enhanced on enhanced MRI. All of the abdominal masses presented gradual enhancement on enhanced triphase CT and/or MRI scan. Conclusion Fat rarely occurs in ganglioneuromas. CT measurement and fat-suppression sequence of MRI can confirm its occurrence. CT and/or enhanced MRI scanning of the predilection location help to improve the diagnosis of FCG.

Key words: Fat, Ganglioneuroma, Magnetic resonance imaging, Tomography, X-ray computer

中图分类号:

R814.4

张丽红,李娴,王林省,李宏磊,李磊. 含脂肪节细胞神经瘤的影像学表现与病理对照[J]. 山东大学学报 (医学版), 2018, 56(12): 73-78.

ZHANG Lihong, LI Xian, WANG Linsheng, LI Honglei, LI Lei. Fat-containing ganglioneuroma: imaging features and clinicopathological correlation[J]. Journal of Shandong University (Health Sciences), 2018, 56(12): 73-78.

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