familial isolated hyperparathyroidism
(fuh-MIH-lee-ul I-soh-LAY-ted HY-per-PAYR-uh-THY-roy-dih-zum)
A rare inherited condition in which one or more tumors form in the parathyroid glands (four pea-sized organs found on the thyroid) and cause them to make too much parathyroid hormone. The increased parathyroid hormone causes a loss of calcium from the bones and too much calcium in the blood. Also called FIHP.