<unk>  is overactivity of the parathyroid glands resulting in excess production of parathyroid hormone (PTH).  The parathyroid hormone monitors calcium and phosphorus levels and helps to maintain these levels.   Overactivity of one or more of the parathyroid glands causes high calcium levels (hypercalcemia) and low levels of phosphorus in the blood. <unk>  was first described and treated in the 1930s by Fuller Albright of Massachusetts General Hospital, working at the Mallinckrodt General Clinical Research Center.
Hyperparathyroidism
Pseudohyperparathyroidism
Secondary hyperparathyroidism
Hypoparathyroidism
Renal osteodystrophy
Parathyroid disease
Primary parathyroid hyperplasia
Pseudohypoparathyroidism