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Decreased renal transplant function after parathyroidectomy.

Anke Schwarz1, Gunnar Rustien, Saskia Merkel

  • 1Department of Nephrology, Hannover Medical School, Carl Neuberg Strasse 1, D-30625 Hannover, Germany. schwarz.anke@mh-hannover.de

Nephrology, Dialysis, Transplantation : Official Publication of the European Dialysis and Transplant Association - European Renal Association
|October 13, 2006
PubMed
Summary

Parathyroidectomy (PTX) after kidney transplant can impair renal function due to relative hypoparathyroidism. This study found decreased creatinine clearance in 47% of patients post-PTX, highlighting the impact on kidney function.

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Area of Science:

  • Nephrology
  • Endocrinology
  • Transplantation Medicine

Background:

  • Persistent secondary hyperparathyroidism following renal transplantation often necessitates parathyroidectomy (PTX).
  • Clinical observations suggest a potential decline in renal function post-PTX in these patients.

Purpose of the Study:

  • To investigate the impact of parathyroidectomy on renal function in kidney transplant recipients.
  • To identify predictors of renal function deterioration after PTX.

Main Methods:

  • Evaluation of 76 kidney transplant patients who underwent parathyroidectomy between 1997 and 2003.
  • Analysis of creatinine clearance, parathyroid hormone (PTH) levels, serum calcium, and graft survival.
  • Prospective measurement of inulin and para-amino-hippuric acid (PAH) clearance in a subgroup.

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Main Results:

  • 47% of patients experienced a >20% decrease in creatinine clearance post-PTX.
  • Lower post-PTX PTH levels and greater PTH decline predicted deteriorating renal function.
  • Inulin and PAH clearance significantly decreased post-PTX, with calcification noted in 70% of biopsies.

Conclusions:

  • Relative hypoparathyroidism following PTX is a primary mechanism for decreased renal function post-transplant.
  • PTH influences renal perfusion and glomerular filtration rate.
  • No significant difference in 10-year graft survival was observed between groups with and without renal function deterioration.