Hyperparathyroidism occurs when at least one overactive parathyroid gland makes too much PTH. This may affect the amount of calcium in your blood and cause symptoms ranging from mild to severe.

Parathyroid disorders occur when parathyroid glands don't function properly. There are two main types of parathyroid disorders: Hyperparathyroidism—Overactive parathyroid glands that can cause bone ...

Primary hyperparathyroidism arises from the overactivity of the parathyroid glands, which secrete excessive parathyroid hormone (PTH). Learn more.

High PTH levels could be caused by overactive parathyroid glands. This is called hyperparathyroidism. However, there are other potential causes of high PTH levels, such as: ...

Overactive parathyroid glands or an underlying health condition can disrupt the balance of calcium. If calcium levels become too high, a person may receive a diagnosis of hypercalcemia.

High blood-calcium levels could mean an overactive parathyroid gland. Dr. Judith Reichman has advice on coping with this condition. Q: A routine blood exam showed my blood-calcium level was high ...

Too much calcium could be a sign of hyperparathyroidism, a condition caused by overactive parathyroid glands that produce too much PTH. Excess calcium in the blood can lead to kidney stones ...

Hyperparathyroidism-jaw tumor syndrome, which causes overactive parathyroid glands and tumors that usually are benign but sometimes are cancerous; Multiple endocrine neoplasia, which can affect the ...

The most common cause of this condition is an overactive parathyroid gland. You have four small parathyroid glands in your neck, each about the size of a single grain of rice.

Parathyroid cancer is very rare. Most cases of parathyroid disease, including almost all cases of overactive parathyroid, are not cancer. ... Fred Hutch treats the full range of cancers that can ...