hormonal and metabolic disorders
Hyperparathyroidism
Diagnosis of Hyperparathyroidism
Blood tests It is common for a person with hyperparathyroidism to have no symptoms. Doctors often first recognize that hyperparathyroidism may be a problem when a blood test, usually done for another reason, shows an elevated level of calcium in the blood (hypercalcemia). Once hypercalcemia is confirmed, doctors usually then check the PTH level in the blood. The test is frequently repeated. The finding of a persistently elevated PTH level in a person with hypercalcemia confirms hyperparathyroidism. Normally, PTH regulates calcium in the blood. When calcium is low, the parathyroid glands secrete more PTH to increase calcium in the blood. When calcium in the blood is high, the parathyroid glands slow PTH secretion. Thus, having a high or even high normal PTH level at the same time as a high calcium level, is not normal. Sometimes imaging tests of the neck (for example,ultrasonography, magnetic resonance imaging, or computed tomography) are done to pinpoint the location of an abnormal parathyroid gland. 