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Updated: May 9, 2026

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IgM nephropathy in children: clinicopathologic analysis.

Luis F Arias1, M Claudia Prada, Catalina Vélez-Echeverri

  • 1Departamento de Patología, Facultad de Medicina, Universidad de Antioquia y Hospital Universitario San Vicente de Paúl, Medellín, Antioquia, Colombia.

Nefrologia : Publicacion Oficial De La Sociedad Espanola Nefrologia
|July 31, 2013
PubMed
Summary
This summary is machine-generated.

IgM nephropathy (IgMN) in children with nephrotic syndrome is common and often shows poor response to steroid treatment. Further research is needed to understand the long-term outcomes for these patients.

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Area of Science:

  • Pediatric Nephrology
  • Glomerular Diseases
  • Immunopathology

Background:

  • IgM nephropathy (IgMN) is characterized by mesangial immunoglobulin M deposits.
  • It often presents with nephrotic proteinuria and may be linked to steroid resistance.

Purpose of the Study:

  • To describe the clinical, histological, and immunopathological features of pediatric IgMN.
  • To evaluate the response to steroid treatment in these patients.

Main Methods:

  • Retrospective analysis of clinical records from two hospitals.
  • Re-assessment of histological sections from pediatric renal biopsies.

Main Results:

  • IgMN accounted for 5.17% of pediatric renal biopsies.
  • Common histological findings included mesangial hypercellularity and focal segmental glomerulosclerosis.
  • Over half of patients experienced frequent relapses, and a significant portion were steroid-resistant.

Conclusions:

  • Diffuse mesangial IgM deposits are a notable finding in pediatric nephrotic syndrome.
  • Clinical presentation is associated with reduced steroid responsiveness.
  • Long-term prognosis remains uncertain.