hyperparathyroidism

Definition of hyperparathyroidism
National Cancer Institute

hyperparathyroidism

(HY-per-PAYR-uh-THY-roy-dih-zum)
A condition in which the parathyroid gland (one of four pea-sized organs found on the thyroid) makes too much parathyroid hormone. This causes a loss of calcium from the bones and an increased level of calcium in the blood. Symptoms include bone pain and kidney problems.

Source: NCI Dictionary of Cancer Terms