腹膜后肾上腺外副神经节瘤的CT、MRI表现  

CT and MRI manifestations of retroperitoneal extra-adrenal paraganglioma

作　　者：马永华[1] 许守利 孙建刚[1] 孙晓峰[1] 李安栋 岳都金 魏东臣[2] 

机构地区：[1]山东省泗水县人民医院,山东泗水273200 [2]济宁医学院附属医院,山东济宁272029

出　　处：《中国中西医结合影像学杂志》2011年第2期126-128,F0002,共4页Chinese Imaging Journal of Integrated Traditional and Western Medicine

摘　　要：目的:探讨腹膜后肾上腺外副神经节瘤的CT、MRI表现特点,提高其影像学诊断水平。方法:收集经手术病理证实的腹膜后肾上腺外副神经节瘤14例,回顾性分析其CT、MRI表现及病理学特点。结果:右侧5例,左侧9例。大小2.3 cm×2.5 cm×2.6 cm～17.6 cm×23.8 cm×14.5 cm。肿块以囊实性为主,以囊性为主者3例,以实性为主者7例,基本呈实性者4例,未见完全囊性病灶。CT平扫表现为等或等低混杂密度灶,边缘清楚,实性部分密度与腹主动脉相近,CT值约为38.5～49.3 HU,囊性部分CT值平均约为18.9 HU。MR检查囊性部分呈长T_1长T_2异常信号,实性部分呈等T_1长T_2异常信号。增强扫描后动脉期表现为明显不均质强化肿块,囊性部分无强化,实性部分CT值约为69.5～117.3 HU。门静脉期CT值峰值略下降,信号降低,实性肿块表现为明显均匀强化,CT值约为64.7～103.5 HU,平均77.8 HU。延迟期实性部分密度、信号逐渐下降。结论:腹膜后肾上腺外副神经节瘤有一定的CT、MRI表现,结合临床及实验室检查能得出比较准确的诊断结果。Objective： To explore the CT, MRI manifestations of retroperitoneal extra-adrenal paraganglioma, in order to improve its imaging diagnosis. Methods： Fourteen cases of retroperitoneal extra-adrenal paraganglioma confirmed by surgery and pathology were collected, and their CT and MRI manifestations were analyzed retrospectively. Results： The retroperitoneal extra-adrenal paraganglioma located in the right side in 5 cases, the left side in 9 cases. Size was about 2. 3 cm× 2.5 cm × 2.6 cm-17.6 cm×23.8 cm× 14.5 cm in size. The masses were mainly cystic and solid, cystic-based in 3 patients, solid-based in 7 cases, almost solid in 4 cases. There were no completely cystic tumors. On the pre-contrast imaging, CT scan showed mixed low- and iso-intensity, the edge of the lesion was clear, CT value of solid part was close to the abdominal aorta, approximately 38.5-49.3 HU, average CT value of the cystic part was about 18.9 HU. MR examination showed low signal on T1WI, high sigal on T2 WI in the cystic part of tumor; iso-signal on T1 WI and hyper-signal on T2 WI in the solid part. On the post-contrast imaging, arterial phase showed clearly a heterogeneous enhanced mass, cystic part had no enhancement, solid part of the CT value was approximately 69.5-117.3 HU. Portal venous phase CT peak and signal slightly decreased, the signal reduction, solid mass showed significantly enhanced uniformity, CT value was approximately 64.7-103.5 HU, average 77.8 HU. Delay phase density and signal was gradually declining of solid part. Conclusion： Retroperitoneal extra-adrenal paraganglioma have a certain CT, MRI manifestations. A accurate diagnosis can be made combined with clinical and laboratory examinations.

关 键 词：副神经节瘤 肾上腺外 体层摄影术 X线计算机 磁共振成像 

分 类 号：R445.2[医药卫生—影像医学与核医学] R736.6[医药卫生—诊断学] R816.7[医药卫生—临床医学]