UW MEDICINE ULTRASOUND
Azygos Vein – Incidental finding
![](https://depts.washington.edu/usrad/wordpress/wp-content/uploads/2020/07/1-300x263.jpg)
B-mode image showing an incidental azygos vein on 3VV.
![](https://depts.washington.edu/usrad/wordpress/wp-content/uploads/2020/07/1a-300x263.jpg)
Labeled image
![](https://depts.washington.edu/usrad/wordpress/wp-content/uploads/2020/07/2-270x300.jpg)
PA and Ao have the same flow direction. Note the flow in the extra vessel going from the IVC to the SVC. This is an azygos vein.