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.

An endocrine condition due to an increase in the secretion of the parathyroid gland that regulates the proper functioning of the skeletal, digestive, renal, and nervous systems. Symptoms and signs may include lethargy, constipation, nausea, vomiting, polyuria. In extreme cases, bone pain (Recklinghausen's disease of the bone), renal stones, renal failure, and coma.