孤立性左侧无名静脉瘤2例并文献复习

Isolated left innominate vein aneurysms:two cases reports and literature review

目的分析总结孤立性左侧无名静脉瘤的影像表现,以提高对该疾病的认识。方法回顾性分析2例孤立性左侧无名静脉瘤的临床表现及影像特征,并复习相关文献。结果2例病人的病灶均位于上纵隔,邻近组织结构未见受压改变,无相应临床症状。CT平扫时病灶与血管密度一致,紧邻左侧无名静脉。经右侧肘前静脉注射对比剂后,病变动脉期无明显强化;经左侧肘前静脉注射对比剂,病灶动脉期即可见对比剂充填,延迟期显示2例病灶密度与无名静脉一致。结论无名静脉瘤的影像表现具有一定特异性,动脉期强化程度与对比剂注射位置有关,延迟期强化程度与无名静脉一致,病变与邻近无名静脉交通。

Objective To analyze and summarize the imaging manifestations of isolated left innominate vein aneurysms in order to improve the understanding of this disease.Methods The clinical manifestations and imaging features of two cases of isolated left innominate vein aneurysm were retrospectively analyzed,and the relevant literature was reviewed.Results The lesions in both patients were located in the upper mediastinum,with no compression changes in adjacent tissue structures and no corresponding clinical symptoms.During the CT plain scan,the density of the lesion and vascular were similar and adjacent to the left innominate vein.There was no significant enhancement in the arterial phase of contrast agent injection through the right anterior elbow vein.While contrast agent filling was visible in the arterial phase of contrast agent injection through the left anterior elbow vein,during the delayed phase,the density of the lesions in 2 cases were consistent with the innominate vein.Conclusion The imaging manifestations of innominate vein aneurysm have certain specificity.The enhancement of arterial phase is related to the location of contrast agent injection,the enhancement of delayed phase is consistent with innominate vein,and the lesions communicate with adjacent innominate vein.