What is (are) Primary Hyperparathyroidism ?
The parathyroid glands are four pea-sized glands located on or near the thyroid gland in the neck. Occasionally, a person is born with one or more of the parathyroid glands in another location. For example, a gland may be embedded in the thyroid, in the thymusan immune system organ located in the chestor elsewhere around this area. In most such cases, however, the parathyroid glands function normally.
                
The parathyroid glands are part of the bodys endocrine system. Endocrine glands produce, store, and release hormones, which travel in the bloodstream to target cells elsewhere in the body and direct the cells activity.
                
Though their names are similar, the thyroid and parathyroid glands are entirely different glands, each producing distinct hormones with specific functions. The parathyroid glands produce PTH, a hormone that helps maintain the correct balance of calcium in the body. PTH regulates the level of calcium in the blood, release of calcium from bone, absorption of calcium in the small intestine, and excretion of calcium in the urine.
                
When the level of calcium in the blood falls too low, normal parathyroid glands release just enough PTH to restore the blood calcium level.