Fig. 2

^99mTechnetium-sestamibi dual phase scan. a, anterior view twenty minutes after tracer administration showing homogeneous tracer distribution within the thyroid gland (red arrow) and normal variant brown fat uptake (blue arrows). b, 2-h delayed anterior view showing complete wash out of the tracer from both thyroid lobes, persistent brown fat uptake (blue arrows), and no abnormal tracer activity in the thyroid bed or elsewhere in the head, neck, and the mediastinum to qualify for parathyroid adenoma