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Renal diseases: a 27-year renal biopsy study
Elisio Carvalho1, Maria do Sameiro Faria, José Pedro L Nunes
1Department of Nephrology, Hospital Sao Joao, Faculty of Medicine, University of Porto, Portugal.
Journal of Nephrology
|October 19, 2006
Summary
IgA nephropathy is the most common glomerular disease in northern Portugal, with its frequency increasing over time. This pattern differs from findings in the Americas, aligning more with European and Asian populations.
Area of Science:
- Nephrology
- Pathology
- Epidemiology
Background:
- Renal biopsy (RB) data from national registries are crucial for diagnosing renal diseases.
- International variations in renal disease patterns necessitate region-specific analyses.
- Understanding local epidemiological trends is key for targeted diagnostic and treatment strategies.
Purpose of the Study:
- To identify the frequency patterns of glomerular diseases in northern Portugal.
- To analyze temporal changes in the incidence of renal pathologies over a 27-year period.
- To compare these findings with international epidemiological data.
Main Methods:
- Retrospective review of all renal biopsies performed at a single institution from 1977 to 2003.
- Categorization of patients into three 9-year intervals for temporal analysis.
- Analysis of clinical presentations and pathological diagnoses, including primary and secondary glomerulonephritis, and vascular and tubulointerstitial diseases.
Main Results:
- Nephrotic syndrome was the most frequent clinical presentation (42.0%).
- Primary glomerulonephritis (GN) was the most common pathology (50.4%), with IgA nephropathy being the most prevalent type (31.2%).
- Significant increases in the frequency of secondary GN, vascular/tubulointerstitial diseases, and IgA nephropathy were observed over time.
Conclusions:
- IgA nephropathy is the predominant glomerular disease in northern Portugal.
- The epidemiological pattern of glomerular diseases in this European population aligns with European and Asian data, but contrasts with American findings.
- Temporal trends indicate a rising incidence of secondary GN and vascular/tubulointerstitial diseases.
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