Lupus nephritis. Clinicopathological correlation

Area of Science:

• Nephrology
• Pathology
• Immunology

Background:

• Lupus nephritis is a severe complication of systemic lupus erythematosus.
• Accurate classification of lupus nephritis is crucial for prognosis and treatment.
• Histopathological evaluation of renal biopsies is key to understanding disease activity.

Purpose of the Study:

• Classify lupus nephritis renal biopsies using the modified World Health Organization (WHO) classification.
• Assess activity and chronicity indices using the National Institute of Health (NIH) protocol.
• Correlate histological findings with clinical features at the time of biopsy.

Main Methods:

• Retrospective review of 78 lupus nephritis patients' renal biopsies.
• Biopsies analyzed over a 10-year period (1995-2005).
• Utilized light, fluorescent, and electron microscopy; assessed by histopathologists and a nephrologist.

Main Results:

• WHO class IV was the predominant histological type.
• Class IV patients frequently presented with microhematuria, proteinuria, and renal insufficiency.
• Active and chronic lesions were more common in classes III/IV, correlating with clinical renal disease evidence.

Conclusions:

• Renal biopsy findings significantly enhance the prediction of lupus nephritis patient status.
• While a relationship exists between histopathology and clinical course, uniform correlation was not observed.
• Renal biopsy provides critical information beyond clinical data for managing lupus nephritis.