The parathyroid glands are two pairs of small, oval-shaped glands. They are located next to the two thyroid gland lobes in the neck. Each gland is usually about the size of a pea. Function of the parathyroid glands. Parathyroid glands produce parathyroid hormone, which plays a key role in the regulation of calcium levels in the blood.

Enlargement (hyperplasia) of two or more parathyroid glands accounts for most other cases. A cancerous tumor is a very rare cause of primary hyperparathyroidism. One or more of the parathyroid glands produces high amounts of parathyroid hormone. This leads to high calcium levels and low phosphorus levels in your blood.

Having your digestive tract absorb more calcium from the foods you eat. primary hyperparathyroidism secondary hyperparathyroidism vitamin D deficiency and severe calcium deficiency. A noncancerous (benign) growth, called an adenoma, forms on a single parathyroid gland. The adenoma causes the gland to overact and make more PTH.

Primary hyperparathyroidism is a disorder of the parathyroid glands, four pea-sized glands located on or near the thyroid gland in the neck. “Primary” means this disorder begins in the parathyroid glands, rather than resulting from another health problem such as kidney failure. In primary hyperparathyroidism, one or more of the parathyroid.

Hyperparathyroidism develops from too much activity in one or more parathyroid glands, the grain-of-rice-sized structures near the thyroid glands in your neck.The parathyroid glands create parathyroid hormone (PTH), which boosts the levels of calcium in the bloodstream when needed. Too much PTH is produced from:

Primary hyperparathyroidism occurs because of a problem with one or more of the four parathyroid glands: A noncancerous growth (adenoma) on a gland is the most common cause. Enlargement (hyperplasia) of two or more parathyroid glands accounts for most other cases. A cancerous tumor is a very rare cause of primary hyperparathyroidism.