Inferior thyroid vein drains into
The inferior thyroid veins emerge at the lower border of the isthmus. They form a plexus in front of the trachea and drain into the left brachiocephalic vein. Ref: BD Chaurasia's HUMAN ANATOMY, Volume 3, 4th edition.
Internal jugular vein
Superior vena cava
Brachiocephalic vein
EXternal jugular vein
Head and neck