Fig. 2
From: The azygos vein pathway: an overview from anatomical variations to pathological changes
CT of the normal azygos venous system. Contrast-enhanced CT axial images show the normal appearance of the azygos vein arching from the right paraspinal space to the superior vena cava (a). The azygos vein runs longitudinally on the right side of the thoracic vertebral bodies (a). The hemiazygos vein runs on the left side of the spine (b) until anastomosis with the azygos vein on T8-9 as shown in the sagittal and coronal view (c–d)