A parathyroid adenoma is a benign tumor of the parathyroid gland. It generally causes hyperparathyroidism; there are very few reports of parathyroid adenomas that were not associated with hyperparathyroidism. A human being usually has four parathyroid glands located on the posterior surface of the thyroid in the neck. In order to maintain calcium metabolism, the parathyroid glands secrete parathyroid hormone (PTH) which stimulates the bones to release calcium and the kidneys to reabsorb it from the urine into the blood, thereby increasing its serum level. The action of calcitonin opposes PTH. When a parathyroid adenoma causes hyperparathyroidism, more parathyroid hormone is secreted, causing the calcium concentration of the blood to rise, resulting in hypercalcemia.
medical cause of Hyperparathyroidism
medical diagnosis of Hyperparathyroidism
medical cause of Hyperphosphatemia
medical cause of Hypophosphatemia
complications of Hyperparathyroidism
symptom of Hyperparathyroidism
medical cause of Hyperthyroidism
medical cause of Hypothyroidism