History:

Patient presented with elevated calcium and PTH, suspicious of a parathyroid adenoma.

Scan Appearance:
There is a solitary focus of tracer uptake which demonstrates retention relative to the thyroid gland in the lower left neck. This is located inferior to the lower pole of the left lobe of the thyroid. Tracer distribution throughout the neck and mediastinum is otherwise physiological.

Scan Findings:
These images demonstrate clearly a parathyroid adenoma which is located inferior to the left lobe of the thyroid.