Final answer:
Hyperparathyroidism, characterized by the overproduction of parathyroid hormone causing increased blood calcium levels, can lead to the deposition of calcium phosphate in the collagen matrix of soft tissues, resulting in calcification.
Step-by-step explanation:
This condition stems from an abnormally high activity of the parathyroid gland, leading to an overproduction of parathyroid hormone (PTH). PTH facilitates the reabsorption of calcium from bone, which may result in elevated levels of calcium in the blood. When this happens, calcium phosphate, a mineral salt component that includes hydroxyapatite, can deposit in the collagen fiber matrix of soft tissues. This process can crystallize and harden the tissue. The presence of these calcifications in tissues other than bones can impair their normal function and lead to various health issues.