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Clinical and Experimental Nephrology

, Volume 13, Issue 4, pp 397–401 | Cite as

Nephrotic-range proteinuria in a patient with a renal allograft treated with sorafenib for metastatic renal-cell carcinoma

  • Iris J. A. M. Jonkers
  • Marjolijn van Buren
Case Report

Abstract

A 51-year-old man with immunoglobulin A (IgA) nephropathy developed metastatic renal-cell carcinoma of his native right kidney, 3.5 years post kidney transplant. At that time renal function was stable with the presence of only mild proteinuria. Shortly after chemotherapy with sorafenib [anti-vascular endothelial growth factor (VEGF)] was initiated, progressive renal impairment, hypertension, and nephrotic-range proteinuria developed. Allograft biopsy showed extensive IgA nephropathy. After withdrawal of the anti-VEGF therapy, however, renal function and blood pressure improved, and proteinuria diminished. Based on the clinical course and histopathological findings we hypothesize that sorafenib may induce nephrotic-range proteinuria and renal impairment, possibly through anti-VEGF-mediated effects on the progression of IgA nephropathy.

Keywords

IgA nephropathy Proteinuria Sorafenib VEGF 

Notes

Acknowledgments

The authors thank Ingeborg Bajema for the provision of the figures.

Conflict of interest statement

None declared.

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Copyright information

© Japanese Society of Nephrology 2009

Authors and Affiliations

  • Iris J. A. M. Jonkers
    • 1
  • Marjolijn van Buren
    • 2
  1. 1.Department Nephrology C3-RLeiden University Medical CenterLeidenThe Netherlands
  2. 2.Department of Internal MedicineHaga ZiekenhuisThe HagueThe Netherlands

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