(a)
(b)
Figure 1: (a) Computed tomography of the neck. The scan with contrast enhancement shows a large heterogeneous soft tissue mass (28 mm transverse diameter), clearly defined, within the left thyroid lobe (white arrow). (b) Tc-MIBI scintigraphy. Early and delayed scintigrams reveal focal accumulation of increased radiotracer uptake in the left lobe of the thyroid.