Thyroidea ima artery

Case contributed by Dr Mostafa Mahmoud El Feky

Presentation

Aortic Angiography

Modality: DSA (angiography)
Thyroidea IMA — when the inferior thyroid artery arises proximal to its expected thyrocervical trunk origin, whether from the arch or from the subclavian, thats what you call it.  In this case, the ima (black arrowheads)

Case Discussion

The thyroidea ima artery arises from the brachiocephalic trunk and ascends in front of the trachea to the lower part of the thyroid gland, which it supplies. It is only present in approximately 3-10% of the population. It varies greatly in size, and appears to compensate for deficiency or absence of one of the other thyroid vessels. Occasionally, it arises from the aorta, the right common carotid, the subclavian or the internal thoracic artery.

Due to its location and infrequent presence, it can cause problems for physicians performing a tracheostomy or a thyroidectomy.

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Case Information

rID: 22282
Case created: 24th Mar 2013
Last edited: 5th Oct 2015
System: Vascular
Inclusion in quiz mode: Excluded

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