目的 探讨肾上腺外副神经节瘤 的影像(CT、MR)特点，提高其诊断准确 率。方法 对25例肾上腺外副神经节瘤的 的影像资料进行分析，探讨CT和MRI诊断 肾上腺外副神经节瘤的的价值。结果 8例 位于腹主动脉旁占(8/25)，14例位于头颈 部占14/25(其中9例颈动脉体瘤,位于颈、 内动脉分叉处；5例颈静脉球瘤)，2例位 于内脏(1例位于膀胱；1例位于十二指肠 降段粘膜下)，2例位于椎管内。肿瘤以囊 实性为主，与周围组织分界清晰，MR及CT 平扫肿瘤信号及密度不均匀，增强扫描实 性部分可明显强化。小于20mm肿瘤信号及 密度较均匀，无液化、坏死，无钙化，大 于20mm肿瘤均出现不同程度囊变、坏死， 肿瘤越大，囊变坏死越明显，大于100mm 的肿瘤内部还会出现钙化。结论 肾上腺 神经节细胞瘤的CT和MRI表现具有一定特 征性，在肿瘤的定位、定性诊断及血供特 点、浸润程度及鉴别诊断方面可互相补 充,对肾上腺外副神经节瘤患者临床术前 诊断具有重要价值。

Objective To investigate the image (CT, MR) features of the extra-adrenal paragangliomas to improve their diagnostic accuracy. Methods 25 cases of extra-adrenal paragangliomas data were analyzed and to explore the diagnostic value of extra-adrenal paragangliomas. Results 8 cases located beside the abdomial aorta, 14 cases in the head and neck, 2 cases in abdominal organs, 2 cases in the spinal canal.The tumors were cystic and solid, with clear boundary, heterogeneous density or intensity, the solid part can be significantly enhanced after enhancement. Tumors less than 20 mm had uniform density or signal, without liquefaction, necrosis, nor calcification. Tumors larger than 20mm had different degrees of cystic degeneration, necrosis, and the cystic necrosis were more obvious if the tumor were larger, tumor larger than 100mm will combine calcification. Conclusion The CT and MRI manifestation of the extra-adrenal paragangliomas had certain characteristic, and can complement each other in the tumor location, qualitative analysis and reflex the blood supply, infiltration degree of differential diagnosis, which had important value in clinical before operation.