PMC4995530_01
(A, B) High frequency ultrasonography thyroid tissue in the right thyroid fossa with an empty left thyroid fossa. (C) Thyroid scintigraphy revealed absence of left lobe and isthmus with normal uptake on the right side. (D, E) Focused reconstruction of the first part of subclavian artery (open arrows) on CT-Angiography reveals underdeveloped left inferior thyroid artery. Note the corresponding normal inferior thyroid artery on the right side (straight arrow) (F) Operative photograph shows bulky nodular right lobe of thyroid (solid arrow). Note the left thyroid fossa is empty (open arrow).
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CT angiography was done in the first two patients (Fig. 1, Fig. 2) to confirm the absence of thyroid arteries but was omitted subsequently (sonographic images of third patient not shown), also the same would not have altered the management protocol planned.