An abnormal course of the interazygos vein: a case report

Abstract

Background The azygos venous system in the posterior mediastinum has a complex developmental pattern. Case presentation During the dissection of this region, we encountered a variation in this system. In this case, we observed that the accessory hemiazygos and hemiazygos veins in the left side passed anterior to the aorta and drained to the azygos vein located on the left side of the vertebral column. Other structures were normal in this area. Conclusions This variation is important in mediastinal surgery and radiographic interpretation.