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Prolonged hypophosphatemia following parathyroidectomy in chronic hemodialysis patients.

BACKGROUND AND OBJECTIVES
Hypoparathyroidism in patients with functioning kidneys leads to hyperphosphatemia. This paper reviews data suggesting that hypoparathyroidism in patients on maintenance dialysis leads to hypophosphatemia.


DESIGN
Clinical data in two patients on dialysis with hypoparathyroidism following parathyroid surgery; literature review of dialysis patients with hypoparathyroidism following parathyroid surgery.


RESULTS
In the patients presented both here and in the literature, hypoparathyroidism in dialysis patients is associated with persistent hypophosphatemia or decrease in serum phosphorus from its pre-surgery level.


CONCLUSION
In patients on maintenance dialysis, persistent hypoparathyroidism post-parathyroidectomy may lead to chronic hypophosphatemia, in contrast to the hyperphosphatemia usually associated with hypoparathyroidism. Proposed mechanisms for this paradoxical phenomenon include ongoing phosphorus deposition into bone (Hungry Bone Syndrome), phosphorus deposition into soft tissue and/or diminished intestinal phosphorus absorption or increased intestinal phosphorus loss.