Question

___ hyperparathyroidism is due to renal failure or vitamin D deficiency and is characterized by serum calcium below-normal range, with a compensatory rise in PTH levels.

Answer 1

Secondary hyperparathyroidism occurs due to renal failure or vitamin D deficiency, causing low serum calcium and a compensatory increase in PTH. It is often associated with hyperphosphatemia, as phosphate excretion is reduced.

Step-by-step explanation:

The type of hyperparathyroidism described is secondary hyperparathyroidism, which is most commonly due to renal failure or vitamin D deficiency.

It is characterized by serum calcium below the normal range, causing a compensatory rise in parathyroid hormone (PTH) levels. In this condition, the body attempts to normalize serum calcium levels by increasing PTH secretion, which can lead to bone resorption and further complications if not managed properly. Hyperphosphatemia is often associated with this condition due to the reduced phosphate excretion that accompanies renal failure, contributing to the hypocalcemia that is observed.