Superior thyroid vein
The superior thyroid vein is a vein located in the neck. It originates from the thyroid gland, allowing for the return of blood to the heart that was supplied by the superior thyroid artery. The vein is connected to the thyroid gland by tributary veins that connect to both the surface and the interior of the gland. Also connected to the thyroid gland is the related middle thyroid vein. Both the superior and middle thyroid veins connect to the upper portion of the left internal jugular vein in the neck. The superior laryngeal vein and the cricothyroid vein connect to the superior thyroid as well, with blood flowing from these veins through the superior thyroid and into the internal jugular. From the internal jugular vein, the blood continues to the superior vena cava and into the heart. Like the majority of veins in the neck and throat, the superior thyroid vein is not protected by bone and only minimally protected by cartilage. Injury to the neck may damage the superior thyroid and other veins, potentially resulting in severe blood loss.
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In Depth: Superior thyroid vein