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Microscopic polyarteritis--a treatable cause of rapidly progressive renal failure due to necrotising
J L Seggie1, L Gordon-Smith, A M Meyers
1Department of Medicine, Johannesburg Hospital.
Abstract:
The clinical features of 25 patients with microscopic polyarteritis are reviewed. Major indications of disease were haematuria and proteinuria accompanied by significant renal dysfunction, which was rapidly progressive in the majority of patients. Unrewarding investigations aimed at defining a cause of haematuria that could be treated surgically only served to delay diagnosis, which could be promptly made by renal biopsy. Early institution of cyclophosphamide therapy led to ablation of the inflammatory process and stabilisation of renal function. In men, who were affected twice as often as women, there was a striking association with employment in the goldmining industry.
Insights
Microscopic polyarteritis often presents with rapid kidney dysfunction, indicated by hematuria and proteinuria. Early diagnosis via renal biopsy and cyclophosphamide treatment can halt disease progression, particularly in gold miners.
Area of Science:
- Nephrology
- Rheumatology
- Pathology
Background:
- Microscopic polyarteritis is a rare vasculitis affecting small blood vessels.
- Renal involvement is a common and serious manifestation, often leading to rapid kidney failure.
- Accurate and timely diagnosis is crucial for effective management.
Purpose of the Study:
- To review the clinical features of microscopic polyarteritis in a cohort of patients.
- To evaluate the diagnostic utility of renal biopsy.
- To assess the efficacy of cyclophosphamide therapy in managing the disease.
Main Methods:
- Retrospective review of 25 patients diagnosed with microscopic polyarteritis.
- Analysis of clinical presentations, laboratory findings, and renal biopsy results.
- Evaluation of treatment outcomes with cyclophosphamide.
Main Results:
- Hematuria and proteinuria with rapidly progressive renal dysfunction were key indicators.
- Renal biopsy provided a prompt and definitive diagnosis, avoiding delays from surgical investigations.
- Early cyclophosphamide therapy resulted in disease stabilization and improved renal function.
- A notable association was observed between male patients and employment in the gold mining industry.
Conclusions:
- Microscopic polyarteritis requires prompt diagnosis, ideally through renal biopsy, to prevent irreversible kidney damage.
- Cyclophosphamide is an effective treatment for ablating inflammation and stabilizing renal function.
- Occupational factors, such as gold mining, may be associated with increased risk in men.