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Kidney biopsy in SLE. I. A clinical-morphologic evaluation.
D D Gladman1, M B Urowitz, E Cole
1University of Toronto Rheumatic Disease Unit, Women's College Hospital, Ontario, Canada.
The Quarterly Journal of Medicine
|December 1, 1989
Summary
Renal biopsy in systemic lupus erythematosus (SLE) is crucial for classifying lupus nephritis. However, renal histology does not always align with clinical signs of kidney disease in SLE patients.
Area of Science:
- Nephrology
- Rheumatology
- Pathology
Background:
- Systemic lupus erythematosus (SLE) frequently affects the kidneys, leading to lupus nephritis.
- Accurate assessment of renal involvement is critical for guiding treatment decisions.
Purpose of the Study:
- To analyze the correlation between renal morphology (histology) and clinical disease in patients with SLE.
- To evaluate the World Health Organization (WHO) classification of lupus nephritis in relation to clinical presentation.
Main Methods:
- Retrospective analysis of 148 SLE patients attending a lupus clinic.
- Renal tissue assessment using the WHO classification of lupus nephritis.
- Recording of active and chronic lesions and measurement of disease activity.
Main Results:
- All WHO classes of lupus nephritis were represented.
- Active and chronic lesions were most common in Class III/IV (proliferative glomerulonephritis).
- Class III/IV patients were more likely to show clinical renal disease than Class II (mesangial) patients.
- Nearly half of Class II patients had renal disease evidence, including elevated creatinine and non-glomerular lesions.
- Two patients with proliferative glomerulonephritis had no clinical renal disease.
Conclusions:
- Renal histological examination in SLE does not uniformly correlate with clinical renal disease at the time of biopsy.
- Findings highlight the importance of renal biopsy for accurate diagnosis and treatment planning in lupus nephritis, even in seemingly mild cases.