Final answer:
Hyperparathyroidism is a condition characterized by increased serum PTH and low calcium levels. It is caused by factors such as renal failure, decreased GI calcium absorption, rickets, or ostomalacia. Excessive PTH production in hyperparathyroidism can lead to bone density loss, fractures, and impaired tissue and organ functioning.
Step-by-step explanation:
Hyperparathyroidism is increased serum PTH resulting from calcium wasting caused by renal failure or decreased GI calcium absorption, rickets or ostomalacia; calcium levels are usually low. Hyperparathyroidism occurs when there is an overproduction of parathyroid hormone (PTH), leading to excessive calcium reabsorption from bone and low calcium levels. This can be caused by different factors such as renal failure, decreased GI calcium absorption, rickets, or ostomalacia. The excessive PTH production in hyperparathyroidism can result in bone density loss and spontaneous fractures, as well as impairments in the functioning of tissues and organs due to calcium deposits.