what causes hyperparathyroidism
In primary hyperparathyroidism, the elevated levels of PTH cause elevated levels of blood calcium (hypercalcemia). Increased calcium and phosphorus excretion in the urine may cause kidney stones. The most common cause of primary hyperparathyroidism is a benign tumor called an adenoma on one of the parathyroid glands that secretes too much PTH. In other cases, the excess PTH is produced by two or more enlarged parathyroid glands, a condition called hyperplasia.
Parathyroid Tumors: What Causes Parathyroid Adenomas (benign tumors)? Parathyroid Disease and hyperparathyroidism can be caused by several things... But, most parathyroid problems occur because one parathyroid gland develops into a benign parathyroid tumor. This page describes what causes the parathyroid gland to go bad and grow into a parathyroid tumor (causing hyperparathyroidism). There are several pages on Parathyroid.com that describe how parathyroid disease (hyperparathyroidism) occurs.