Korean J Med.
2013 Jan;84(1):130-134.
A Case of Pseudohyperphosphatemia in a Patient with Multiple Myeloma
- Affiliations
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- 1Department of Internal Medicine, Daegu Fatima Hospital, Daegu, Korea. mozarteffect@hanmail.net
- 2Department of Laboratory Medicine, Daegu Fatima Hospital, Daegu, Korea.
Abstract
- Hyperphosphatemia develops when there is impaired renal phosphate excretion or massive extracellular fluid phosphate load. For example, renal insufficiency, hypoparathyroidism, exogenous phosphate administration, and extensive cellular injury induce a hyperphosphatemic state. In patients with multiple myeloma, renal insufficiency occurs as a result of hypercalcemia, light chain tubulopathy, urate nephropathy or infection, and hyperphosphatemia usually results from renal failure. We report here a case of a patient with multiple myeloma who had an elevated serum phosphate level measured by the phosphomolybdate UV method without significant renal insufficiency and was finally diagnosed with pseudohyperphosphatemia.
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