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Idiopathic IgA nephropathy with diffuse crescent formation.

Zheng Tang1, Yan Wu, Qing-wen Wang

  • 1Department of Nephrology, Jinling Hospital, Nanjing University, School of Medicine, Nanjing, China.

American Journal of Nephrology
|October 17, 2002
PubMed
Summary
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Idiopathic IgA nephropathy with diffuse crescent formation often presents as rapidly progressive nephritis with severe kidney damage. Intensive immunosuppressive therapy can improve renal outcomes in these patients.

Area of Science:

  • Nephrology
  • Immunopathology
  • Glomerular Diseases

Background:

  • Idiopathic IgA nephropathy (IgAN) is a common primary glomerulonephritis.
  • Diffuse crescent formation in IgAN indicates a more severe disease course.

Purpose of the Study:

  • To characterize the clinicopathological features and outcomes of Chinese patients with IgA nephropathy and diffuse crescent formation (DCIgAN).
  • To evaluate the impact of immunosuppressive therapy on DCIgAN patients.

Main Methods:

  • Retrospective study of 25 DCIgAN patients in China.
  • Analysis of clinical, laboratory, and pathological data.
  • Assessment of treatment response and patient outcomes, with follow-up for at least 6 months for 15 patients.

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Main Results:

  • DCIgAN patients predominantly exhibited rapidly progressive glomerulonephritis with high creatinine levels, gross hematuria, hypertension, and nephrotic syndrome.
  • Pathological findings included severe crescent formation, glomerular capillary necrosis, interstitial inflammation, fibrosis, and vasculitis.
  • Immunohistochemistry revealed elevated IgA and IgM deposition and increased infiltrating immune cells (CD4+, CD8+, CD68+, PCNA+) in renal tissues.
  • Follow-up showed 66.7% maintained renal function, with a minority requiring dialysis.

Conclusions:

  • DCIgAN is characterized by rapid progression and severe renal pathology, exceeding that of general IgAN.
  • Glomerular immune cell infiltration likely contributes to crescent formation.
  • Aggressive immunosuppressive treatment demonstrates efficacy in mitigating renal damage in DCIgAN.