Takasugi J E, Godwin J D
Department of Radiology, Veterans Administration Medical Center, Seattle, WA 98108.
AJR Am J Roentgenol. 1990 Jan;154(1):41-4. doi: 10.2214/ajr.154.1.2104722.
The terminations of the hemiazygos and accessory hemiazygos veins can be mistaken for normal or enlarged posterior mediastinal lymph nodes on CT scans of the chest. These terminations are termed the retroaortic anastomoses by anatomists. We studied the CT appearances of these veins on scans of one cadaver and seven patients. We found that the retroaortic anastomoses usually were clearly recognizable because of their continuity with the hemiazygos or accessory hemiazygos vein. However, it is sometimes possible to mistake these vessels for lymph nodes, especially when only short segments of the vessel are visible on a CT image or when the vessel is not clearly opacified by contrast material. Familiarity with the CT appearances of the hemiazygos and azygous veins can prevent their being mistaken for normal or enlarged lymph nodes.
在胸部CT扫描中，半奇静脉和副半奇静脉的终末段可能会被误认为是正常的或增大的后纵隔淋巴结。解剖学家将这些终末段称为主动脉后吻合。我们研究了1具尸体和7例患者扫描时这些静脉的CT表现。我们发现，主动脉后吻合通常因其与半奇静脉或副半奇静脉的连续性而易于辨认。然而，有时可能会将这些血管误认为是淋巴结，尤其是当CT图像上仅可见血管的短节段或血管未被造影剂清晰显影时。熟悉半奇静脉和奇静脉的CT表现可避免将它们误认为是正常的或增大的淋巴结。
