Sarcoidosis and Hyperparathyroidism with Hypercalcemia

Abstract
TT has recently been discovered that certain conditions giving rise to hypercalcemia and hypercalciuria exhibit in common excessive proportional absorption of dietary calcium and elevated renal calcium clearance, and that in these conditions cortisone regularly and promptly restores normocalcemia and normocalciuria. No such effect upon hypercalcemia and hypercalciuria due to hyperparathyroidism is apparent. These observations not only are of theoretical interest and therapeutic importance but also have furnished the rationale for a diagnostic aid in cases of hypercalcemia in which, as not infrequently happens, the cause proves difficult to establish.A less common but at least equally puzzling problem arises . . .