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The superior thyroid artery is typically the first branch of the external carotid artery. Most of its flow directed into the thyroid bed, with a characteristic thyroid blush on catheter angiography.It is very often seen on a (well-performed) CTA.A superior laryngeal branch often arises from the superior thyroid artery.Penetrating the thyrohyopid membrane along with the superior laryngeal nerve of the vagus nerve, it supplies stuctures of the larynx and hypopharynx.ost of its flow directed into the thyroid bed, with a characteristic thyroid blush on catheter angiography. It is very often seen on a (well-performed) CTA. A superior laryngeal branch often arises from the superior thyroid artery.
Significantly, the relationship between nerve and artery on one side of the neck is similar to that found on the other side in only 17% of the population. Furthermore, at the level of the inferior thyroid artery, branches of the recurrent laryngeal nerve that are extralaryngeal may be present (5%).he video below depicts an ultrasonographic view of the right lobe of the thyroid gland. Thyroid gland, anterior and lateral views. Each lobe is 50-60 mm long, with the superior poles diverging laterally at the level of the oblique lines on the laminae of the thyroid cartilage.