Fig. 2

Images of the parathyroid glands. a The longitudinal scan of neck ultrasound demonstrates a well-defined hypoechoic solid mass posteroinferior to the left lobe of the thyroid gland. b Early and late 99 m Tc-sestamibi scintigraphy parathyroid scan images of the neck and anterior mediastinum at 10 min and 2 h, showing increased focal uptake (red arrow) suggestive of left inferior parathyroid adenoma