Micrograph of a<unk>  (left) and normal parathyroid gland (right). H&E stain. Hyperparathyroidism is confirmed by blood tests such as calcium and PTH levels. A specific test for<unk>  is sestamibi parathyroid scintigraphy, the sestamibi scan. This nuclear imaging technique reveals the presence and location of pathological parathyroid tissue. 4DCT is used as second line investigation to diagnose<unk> . In addition to the three dimensional imaging of a conventional CT scan, 4DCT provides imaging on the changes of iodinated contrast enhancement overtime and present them in a video format (from plain imaging to arterial to venous and delay phases).<unk>  would show low density on non contrast image, with peak enhancement during the arterial phase, then slowly fade away until the delay phase.
Parathyroid adenoma
Parathyroid carcinoma
Thyroid adenoma
Pituitary adenoma
Adrenocortical adenoma
Primary hyperparathyroidism
Tertiary hyperparathyroidism
Nontoxic nodular goiter