endocrine and metabolic disorders
Hyperphosphatemia
Key Points
The usual cause of hyperphosphatemia is advanced renal insufficiency; hypoparathyroidism and pseudohypoparathyroidism are less common causes. Most patients are asymptomatic, but those who also are hypocalcemic may have tetany. Treat by restricting dietary phosphate and sometimes with phosphate binders. Saline diuresis or hemodialysis may be needed. 