Familial Isolated Hyperparathyroidism is a rare genetic disease characterized by overactive parathyroid glands. Familial Isolated Hyperparathyroidism affects the body by creating tumors in the parathyroid gland. The tumors do not usually cause cancer, but they can affect how the glands work. The parathyroid glands regulate the absorption, storage, and release of calcium in the body. When a tumor forms in the parathyroid gland it causes it to release more than calcium than normal. This leads to excess calcium in the blood. Symptoms of increased calcium levels include kidney stones, nausea, vomiting, high blood pressure, weakness, and fatigue. The symptoms can begin to occur in childhood through to adulthood.
Description Last Updated: May 12, 2018