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Focal segmental glomerular sclerosis: the cellular lesion.

M M Schwartz, E J Lewis

    Kidney International
    |December 1, 1985
    PubMed
    Summary
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    Focal segmental glomerulosclerosis (FSG) can present with scarring alone or with a cellular lesion. The cellular lesion in FSG is associated with earlier onset of proteinuria and nephrotic syndrome, suggesting a role in disease progression.

    Area of Science:

    • Nephrology
    • Pathology
    • Glomerular Diseases

    Background:

    • Focal segmental glomerulosclerosis (FSG) is a leading cause of kidney disease.
    • Understanding the pathological variants of FSG is crucial for diagnosis and prognosis.

    Purpose of the Study:

    • To correlate distinct pathological patterns of FSG with clinical and laboratory findings.
    • To investigate the significance of a cellular lesion in FSG pathogenesis.

    Main Methods:

    • Retrospective analysis of 59 renal biopsy specimens with FSG.
    • Correlation of histological findings (segmental scars vs. cellular lesion) with clinical data (proteinuria, nephrotic syndrome, demographics, renal function).

    Main Results:

    • Two patterns identified: segmental scars (39 cases) and scars with a cellular lesion (20 cases).

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  • The cellular lesion group showed significantly shorter intervals from proteinuria onset to biopsy (3.4 months vs. 71.9 months).
  • Both groups had similar demographics and renal function, but the cellular lesion group had a higher incidence of nephrotic syndrome (14/20 vs. 9/39).

    • Conclusions:

    • A cellular lesion in FSG, characterized by hypercellularity and epithelial cell changes, is associated with a more rapid clinical presentation.
    • Glomerular injury, including proliferative lesions and epithelial cell injury, appears to be a significant factor in FSG pathogenesis.