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Related Experiment Videos

C1q nephropathy: features at presentation and outcome.

Keith K Lau1, Lillian W Gaber, Noel M Delos Santos

  • 1Children's Foundation Research Center, Le Bonheur Children's Medical Center, Memphis, TN 38103, USA.

Pediatric Nephrology (Berlin, Germany)
|April 14, 2005
PubMed
Summary

C1q nephropathy, a rare kidney disease, often presents with nephrotic syndrome in children. Early diagnosis and management are crucial for kidney survival, as those without nephrotic syndrome show better outcomes.

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Area of Science:

  • Nephrology
  • Pediatric Nephrology
  • Renal Pathology

Background:

  • C1q nephropathy is a rare glomerular disease.
  • It is characterized by C1q deposition in the glomeruli.
  • Its clinical presentation and long-term outcomes in children are not well-defined.

Purpose of the Study:

  • To describe the clinical characteristics, histological findings, and outcomes of pediatric C1q nephropathy.
  • To evaluate the impact of nephrotic syndrome at diagnosis on kidney survival.

Main Methods:

  • Retrospective case series of 20 pediatric patients diagnosed with C1q nephropathy.
  • Data collected included clinical presentation, laboratory values, renal histology, immunofluorescence, and long-term follow-up.
  • Kidney survival was analyzed based on the presence of nephrotic syndrome at diagnosis.

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Main Results:

  • The study included 20 pediatric patients (55% boys, 60% African Americans) with C1q nephropathy.
  • 40% presented with nephrotic syndrome; 30% had nephrotic range proteinuria.
  • Focal segmental glomerulosclerosis (40%) and minimal change lesion (30%) were the most common histological findings.
  • Four patients with nephrotic syndrome progressed to end-stage renal disease.
  • Kidney survival rates were 94% and 78% at 1 and 5 years, respectively.
  • Patients not presenting with nephrotic syndrome had better renal outcomes.

Conclusions:

  • Pediatric C1q nephropathy exhibits diverse clinical and histological features.
  • Nephrotic syndrome at diagnosis is associated with poorer kidney survival.
  • Further research is needed to understand the pathogenesis and optimize treatment strategies.