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Membranous Nephropathy With MPO-ANCA-Associated Crescentic GN.

Kamal Kanodia1, Aruna Vanikar1, Rashmi Patel1

  • 1Department of Pathology, Laboratory Medicine, Transfusion Services and Immunohematology, G.R. Doshi and K.M. Mehta Institute of Kidney Diseases and Research Centre and Dr. H.L. Trivedi Institute of Transplantation Sciences, Civil Hospital Campus, Ahmedaba, India.

Nephro-Urology Monthly
|March 5, 2015
PubMed
Summary

This study reports a rare case of coexisting membranous nephropathy (MN) and myeloperoxidase (MPO)-antineutrophil cytoplasmic antibody (ANCA)-associated glomerulonephritis (GN). Aggressive management is crucial for this uncommon dual kidney pathology.

Keywords:
Antineutrophil Cytoplasmic AntibodiesGlomerulonephritisMembranous NephropathyMyeloperoxidase (MPO)

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Area of Science:

  • Nephrology
  • Immunopathology

Background:

  • Antineutrophil cytoplasmic antibody (ANCA)-associated glomerulonephritis (GN) presents as pauci-immune crescentic GN.
  • Membranous nephropathy (MN) is characterized by subepithelial immune deposits and glomerular basement membrane (GBM) changes.

Observation:

  • A 48-year-old male exhibited proteinuria, hypoalbuminemia, and renal dysfunction with positive myeloperoxidase (MPO)-ANCA.
  • Renal biopsy showed crescents, thick GBM with subepithelial spikes, and IgG deposition, indicating concurrent MN and MPO-ANCA-associated crescentic GN.

Findings:

  • The patient was diagnosed with the rare coexistence of membranous nephropathy and MPO-ANCA-associated crescentic GN.
  • Initial treatment with corticosteroids and cyclophosphamide did not yield improvement in antibody levels or renal function after one month.

Implications:

  • The coexistence of MN and MPO-ANCA crescentic GN is exceptionally rare.
  • Aggressive therapeutic strategies are necessary for managing this dual kidney disease presentation.