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Primary hyperparathyroidism (or PHPT) is a medical condition where the parathyroid gland (or a benign tumor within it) produce excess amounts of parathyroid hormone (PTH). The symptoms of the condition relate to the resulting elevated serum calcium ( hypercalcemia ), which can cause digestive symptoms, kidney stones , psychiatric abnormalities ...
In primary hyperparathyroidism, about 75% of people are "asymptomatic". [1] While most primary patients are asymptomatic at the time of diagnosis, 'asymptomatic' is poorly defined and represents only those without "obvious clinical sequelae" such as kidney stones, bone disease, or hypercalcemic crisis. [5]
Rarely, it may present in childhood or be the sole clinical manifestation of this syndrome. [citation needed] MEN2A associates medullary thyroid carcinoma with pheochromocytoma in about 20–50% of cases and with primary hyperparathyroidism in 5–20% of cases.
Hyperparathyroidism is most commonly caused by a benign proliferation of chief cells in one parathyroid gland, and rarely in MEN syndrome. This is known as primary hyperparathyroidism , [ 13 ] which is generally managed by surgical removal of the abnormal parathyroid gland .
Hyperparathyroidism is a condition caused by overproduction of PTH, and can be divided into three types. [citation needed] Primary hyperparathyroidism happens when the normal mechanism of regulation by negative feedback of calcium is interrupted, or in other words the amount of blood calcium would ordinarily signal less production of PTH.
The first signs of a parathyroid adenoma and the resulting primary hyperparathyroidism can include bone fractures and urinary calculi such as kidney stones. [1]Often, a parathyroid adenoma is diagnosed by an incidental finding on blood tests that reveal high calcium levels. [3]
Nephrocalcinosis, once known as Albright's calcinosis after Fuller Albright, is a term originally used to describe the deposition of poorly soluble calcium salts in the renal parenchyma due to hyperparathyroidism. The term nephrocalcinosis is used to describe the deposition of both calcium oxalate and calcium phosphate. [1]
Hyperparathyroidism, the presence of excessive amounts of parathyroid hormone in the blood, occurs in two very distinct sets of circumstances. Primary hyperparathyroidism is due to autonomous, abnormal hypersecretion of PTH from the parathyroid gland, while secondary hyperparathyroidism is an appropriately high PTH level seen as a physiological ...