The last tributary of the azygos vein is:
Right superior intercostal vein
Hemi-azygos vein
Right bronchial vein
Accessory azygos vein
All of the above are the tributaries of Azygos vein. Right bronchial vein opens into the Azygos vein near its termination into SVC. Fig:- Venous drainage
Thorax- wall and Bronchopulmonary segment