[Variations in the thyreocervical trunk]

Variations in the vascular system are much more numerous than in other anatomical structures. The knowledge of these variations is essential for radiologists and surgeons in the interpretation of angiograms. A complex variation of the thyreocervical trunk is presented in this paper: The Aa. thoracica interna and cervicalis profunda arises from the truncus which perforates the anterior scalenic muscle.