迷走神经副神经节瘤的MRI诊断(附6例报告及文献复习)

目的 分析迷走神经副神经节瘤的MRI表现。方法 对6例迷走神经副神经节瘤（良性4例，恶性2例）进行回顾性分析，重点分析其部位、信号、大血管移位和转移情况。结果 6例肿瘤中，4例位于上颈部，中、下颈部各1例；右颈部病变4例，左颈部2例；肿瘤类似纺锤形或不规则形；6例信号均欠均匀，其中4例出现“盐和胡椒征”，以“胡椒”表现最为显著；6例病变均有明显强化。对4例病变行MR血管造影，见颈动脉均向前、内移位，颈内静脉向后、外移位。2例恶性肿瘤中，1例破坏颈静脉孔区域骨质并颈部淋巴结和双肺内转移，1例出现颈部淋巴结的转移。结论 迷走神经副神经节瘤有其特定的部位和MRI信号，手术前可以进行定性诊断。

MRI diagnosis of vagal paraganglioma (report of 6 cases and literature review)

Objective To analyze the MR findings of vagal paraganglioma.Methods Six cases of vagal paraganglioma(4 benign and 2 malignant)were retrospectively analyzed with the emphasis on the location,MR signal intensity,dislocation of the carotid vessels,and the metastasis of the tumor.Results The tumors located in the superior(4 cases),middle(1 case)and inferior(1 case)neck,respectively,with right-sided in 4 cases and left-sided in 2 cases.The signal intensities of the six tumors were heterogeneous,combined with 'salt and pepper' appearance in 4 cases in which the 'pepper' appearance was more marked.On MR angiography performed in 4 cases,carotid arteries were found dislocated anteriomedially.Two cases were diagnosed as malignancies by the manifestations of destruction of surrounding bone,metastasis of bilateral lungs and/or the lymph nodes.Conclusion Vagal paragangliomas could be correctly diagnosed before surgery according to their locations and signal intensities.