椎管内副神经节瘤的MRI、病理分析及鉴别诊断

目的分析椎管内副神经节瘤的MRI表现,加强并提高对改病的认识与鉴别诊断能力。方法回顾性分析7例发生于椎管内经病理证实为副神经节瘤患者的临床、病理及MRI资料,所有患者均行MRI平扫及增强检查。结果7例均为男性,年龄22~75岁不等,平均年龄约(45.8±16.8)岁。病例均为腰段椎管内单发病灶,L2-L3节段4例(57.1%),L3-4节段2例(28.6%),L4节段1例(14.3%),所有病灶最长径均未超过2个锥体。较小病灶呈类圆形肿块,较大病灶沿椎管长轴生长。T₁WI呈等或稍低信号,T₂WI信号多不均匀,以稍高信号为主,5例增强扫描呈明显均匀强化,2例呈不均匀明显强化。4例(57.1%)瘤体上面见迂曲血管流空信号。结论椎管内副神经节瘤较为罕见,其MRI表现有一定特点,充分认识其MRI表现,有助于对该病鉴别诊断。

MRI,Pathological Analysis,and Differential Diagnosis of Intraspinal Paraganglioma

Objective To analyze the MRI findings of intraspinal paraganglioma in order to strengthen and improve the understanding and differential diagnosis of the disease.Methods The clinical,pathological and MRI data of 7 patients with intraspinal paraganglioma confirmed by pathology were analyzed retrospectively.All patients were examined by plain and enhanced MRI.Results All the 7 cases were male,ranging in age from 22 to 75 years old,with an average age of(45.8±16.8)years.All the cases were single lesions in the lumbar spinal canal.L2-L3 segment was found in 4 cases(57.1%),L3-L4 segment in 2 cases(28.6%),and L4 segment in 1 case(14.3%).The longest diameter of all lesions was less than 2 cones.The smaller lesions showed a quasi-round mass,and the larger lesions grew along the long axis of the spinal canal.T₁WI showed equal or slightly low signal intensity T₂WI signal intensity was mostly inhomogeneous,mainly slightly high signal intensity,5 cases showed obvious uniform enhancement,2 cases showed inhomogeneous enhancement.Tortuous vascular flow void signal was seen on the tumor in 4 cases(57.1%).Conclusion Intraspinal paraganglioma is rare and its MRI findings have certain characteristics.A full understanding of its MRI findings is helpful for differential diagnosis.