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Related Experiment Videos

Pathologic classification of focal segmental glomerulosclerosis.

Vivette D'Agati1

  • 1Department of Pathology, Columbia University, College of Physicians and Surgeons, New York, USA. vdd1@columbia.edu

Seminars in Nephrology
|April 22, 2003
PubMed
Summary

Focal segmental glomerulosclerosis (FSGS) is a kidney disorder characterized by proteinuria and scarring. This review details its classification, variants like collapsing FSGS, and clinical-pathologic correlations.

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Area of Science:

  • Nephrology
  • Pathology
  • Internal Medicine

Background:

  • Focal segmental glomerulosclerosis (FSGS) is a clinical-pathologic syndrome.
  • It manifests as proteinuria and glomerular damage with foot process effacement.
  • Classification is complex due to primary (idiopathic) and secondary forms.

Purpose of the Study:

  • To discuss the classification of FSGS.
  • To describe morphologic variants and subcategories.
  • To emphasize light microscopic patterns and clinical-pathologic correlations.

Main Methods:

  • Review of morphologic variants of primary and secondary FSGS.
  • Discussion of etiologic associations (HIV nephropathy, heroin nephropathy, etc.).
  • Emphasis on distinguishing light microscopic patterns.

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Main Results:

  • Recognized morphologic variants include FSGS not otherwise specified (NOS), perihilar, cellular, tip, and collapsing variants.
  • Secondary FSGS is often mediated by adaptations to glomerular hyperfiltration.
  • Clinical-pathologic correlations are crucial for diagnosis.

Conclusions:

  • Accurate classification of FSGS is essential for understanding its pathogenesis.
  • Morphologic variants and subcategories have distinct features.
  • Distinguishing light microscopic patterns aids in diagnosis and management.