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[Collagen nephritis]

N R Lago1, M J Bulos, A J Monserrat

  • 1Departamento de Patología, Facultad de Medicina, Universidad de Buenos Aires, Argentina.

Medicina
|January 1, 1997
PubMed
Summary

A new kidney disease involves abnormal type III collagen deposits in the glomeruli, distinct from nail-patella syndrome. Electron microscopy confirmed fibrillar collagen, aiding diagnosis in a patient without typical symptoms.

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Area of Science:

  • Nephrology
  • Pathology
  • Genetics

Background:

  • Fibrillar collagen in glomeruli is typically associated with nail-patella syndrome.
  • A distinct nephropathy characterized by type III collagen deposition has been described, lacking nail and skeletal abnormalities.

Observation:

  • A 26-year-old woman presented with persistent proteinuria, hematuria, and deafness.
  • She had no nail or skeletal abnormalities.
  • Renal biopsy revealed focal and segmental glomerulosclerosis via light microscopy.

Findings:

  • Electron microscopy identified massive intraglomerular deposition of fibrillar collagen within the mesangial matrix and basement membrane.
  • This case represents the first reported instance in the country.

Implications:

  • This finding highlights a novel presentation of collagen-related nephropathy.
  • Electron microscopy is crucial for diagnosing glomerular diseases with atypical collagen deposition.
  • This expands the understanding of collagenopathies affecting the kidney.

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