Cadaveric dissection of case with absence of inferior thyroid artery. (A) Absence of the inferior thyroid artery with the inferior parathyroid gland receiving its blood supply from a branch of the superior thyroid artery, which divides anterior to the thyroid gland (left side); (B) drawing corresponding to Figure 1A, showing the anterior position of this arterial branch. With permission from Delattre et al. (12). A, artery; T, thyroid; R, recurrent laryngeal nerve; V, vein.