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Analysis of Various Types of Glomerulonephritis with Crescents at a Single Center
Tomo Nakakita1, Kenichi Akiyama1, Kazunori Karasawa1
1Department of Nephrology, Tokyo Women's Medical University, Tokyo, Japan.
Insights
Glomerulonephritis with crescent formation, regardless of type, is predicted by early renal dysfunction and global sclerosis. These factors indicate irreversible damage and impact renal prognosis, even with minimal crescents.
Area of Science:
- Nephrology
- Pathology
- Immunology
Background:
- Crescent formation is a key indicator in glomerulonephritis, but studies on Asian populations are limited.
- Advances in diagnostics have reduced cases meeting strict crescentic glomerulonephritis definitions (>50% glomeruli).
- This study examines glomerulonephritis with at least one crescentic lesion.
Purpose of the Study:
- To analyze the clinicopathological features and renal prognosis of glomerulonephritis cases with at least one crescentic lesion.
- To investigate factors influencing renal prognosis in these patients.
- To compare renal outcomes between immune-complex and pauci-immune glomerulonephritis types.
Main Methods:
- Retrospective evaluation of 265 adult patients with glomerulonephritis and at least one crescent on renal biopsy.
- Patients categorized into immune-complex (IgA nephropathy, IgA vasculitis, lupus nephritis) and pauci-immune (microscopic polyangiitis) groups.
- Multivariate analysis (Cox proportional hazards model) and Kaplan-Meier curves used to assess renal prognosis predictors.
Main Results:
- Renal prognosis varied significantly between immune-complex and pauci-immune groups.
- IgA nephropathy was the most common glomerulonephritis type observed.
- Renal function at biopsy and global sclerosis ratio independently predicted renal prognosis, irrespective of glomerulonephritis type.
Conclusions:
- Renal dysfunction and global sclerosis at biopsy are significant predictors of renal prognosis.
- These factors reflect irreversible renal damage and are influenced by the presence of crescentic lesions.
- Predictive factors for renal prognosis are independent of the specific glomerular disease and the extent of crescent formation.
Background:
The importance of crescent formation in glomerulonephritis has increased. However, detailed analysis of crescentic glomerulonephritis in Asia is scarce. In addition, advances in serological diagnostic techniques (antineutrophil cytoplasmic and antiglomerular basement membrane autoantibodies) and early diagnosis have reduced the number of cases meeting the strict definition of crescentic glomerulonephritis (>50% of glomeruli are crescentic). Therefore, we analyzed the clinicopathological features and renal prognosis of glomerulonephritis cases that exhibited at least one crescentic lesion.
Methods:
We retrospectively evaluated 265 adult patients diagnosed with glomerulonephritis with at least one crescent formation based on the results of renal biopsy. We divided the patients into two groups based on the four types of glomerulonephritis, namely, the immune-complex (type II: IgA nephropathy, IgA vasculitis with nephritis, and lupus nephritis) and pauci-immune (type III: microscopic polyangiitis) groups. Factors affecting renal prognosis (end-stage renal failure requiring renal replacement therapy) were examined in a multivariate analysis using the Cox proportional hazards model. Kaplan-Meier curves and log-rank test were used to analyze and compare time from entry to renal death.
Results:
Renal prognosis differed significantly between the immune-complex and pauci-immune groups. Among the four types of glomerulonephritis, IgA nephropathy was the most prevalent. Multivariate analysis showed that renal function at renal biopsy and the ratio of global sclerosis independently predicted renal prognosis, but the type of glomerulonephritis was not a factor.
Conclusions:
Renal dysfunction at renal biopsy and the ratio of global sclerosis predicted renal prognosis, because it reflects the degree of irreversible renal damage. We also suspect that the formation of at least one crescentic lesion led to the development of these predictive factors, regardless of the type of glomerular disease and degree of crescent formation.
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