endocrine and metabolic disorders
Hyperphosphatemia
Diagnosis of Hyperphosphatemia
Phosphate concentration>4.5 mg/dL (>1.46 mmol/L) Hyperphosphatemia is diagnosed by phosphate concentration. When the etiology is not obvious (eg, rhabdomyolysis, tumor lysis syndrome, renal failure, overingestion of phosphate-containing laxatives), additional evaluation is warranted to exclude Hypoparathyroidism or False elevation of serum phosphate also should be excluded by measuring serum protein, lipid, and bilirubin concentrations. 