Figure 1: A 37-year-old female presented with elevated calcium and decreased phosphorus and increased parathyroid hormone (PTH). USG neck showed right superior parathyroid adenoma. Tc99m sestamibi scan (a) early images show increased tracer uptake in the area corresponding to the right lobe of the thyroid and faint tracer uptake in the left lobe of the thyroid gland; (b) delayed images show retention of tracer in the right side. Wash out of tracer is noted from the left lobe of thyroid. (c) SPECT/CT images localize increased tracer uptake to the posterior aspect of right lobe of the thyroid and CT shows the adenoma