Name a condition that can result in hyperphosphatemia.

• A. Chronic kidney disease.
• B. Diabetes mellitus.
• C. Cirrhosis of the liver.
• D. Severe dehydration.

Answer: (A)

Chronic kidney disease is a condition that can lead to hyperphosphatemia primarily due to the kidneys' diminished ability to excrete phosphate. In healthy individuals, the kidneys effectively filter out excess phosphate from the bloodstream; however, when kidney function is compromised, as seen in chronic kidney disease, phosphate excretion is impaired. This results in elevated levels of phosphate in the blood, leading to hyperphosphatemia.

In this context, other conditions listed, such as diabetes mellitus, cirrhosis of the liver, and severe dehydration, are not typically associated with increased phosphate levels as directly as chronic kidney disease. While these conditions can influence various electrolyte balances and metabolic pathways, they do not commonly result in the same level of phosphate retention seen in cases of chronic kidney dysfunction. Thus, chronic kidney disease stands out as a prominent cause of hyperphosphatemia.