Immunoglobulin A nephropathy with massive paramesangial deposits caused by anti-vascular endothelial growth factor therapy for metastatic rectal cancer: A case report and review of the literature

Mayumi Yahata, Izaya Nakaya, Tsutomu Sakuma, Hiroshi Sato, Shigehisa Aoki, Jun Soma

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

Background: Bevacizumab, a recombinant humanized monoclonal antibody for vascular endothelial growth factor, has been widely used in various cancers offering substantial clinical benefit. It is reportedly associated with development of high-grade proteinuria and nephrotic syndrome with the histology of thrombotic microangiopathy, but there has been no report describing the development of immunoglobulin A nephropathy in bevacizumab-treated patients. Case presentation. A 68-year-old man with metastatic rectal cancer was treated with bevacizumab. He presented with hematuria and proteinuria 15 and 17 months, respectively, after bevacizumab initiation. Bevacizumab was stopped at 17 months. Renal biopsy at 19 months revealed immunoglobulin A nephropathy, with numerous paramesangial hemispherical deposits and thrombotic microangiopathy. Electron microscopy showed numerous paramesangial electron-dense deposits of various sizes, and subendothelial injuries. Proteinuria almost completely resolved 8 months after bevacizumab cessation, although hematuria persisted. Follow-up renal biopsy 11 months after bevacizumab cessation showed a marked decrease in mesangial immunoglobulin A deposits and paramesangial electron-dense deposits, which correlated with a gradual decrease in serum immunoglobulin A. Conclusion: This is the first case report that confirmed histologically the development and resolution of immunoglobulin A nephropathy during and after bevacizumab therapy. This case shows that there may be other mechanisms of glomerular injury by bevacizumab besides glomerular endothelial injury leading to thrombotic microangiopathy.

Original languageEnglish
Article number450
JournalBMC Research Notes
Volume6
Issue number1
DOIs
Publication statusPublished - 2013

Keywords

  • Anti-vascular endothelial growth factor therapy
  • Bevacizumab
  • Immunoglobulin A nephropathy
  • Nephrotic syndrome

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)

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