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Membranous nephropathy remains the most common cause of nephrotic syndrome in adults. The common variant is idiopathic membranous nephropathy with no evidence of any known precipitating factors. Membranous nephropathy also occurs as a secondary form in association with inflammatory or neoplastic diseases. Prognosis is mostly favorable as shown by the frequency of spontaneous remissions which averages 30%, although about one-third of patients progress to end-stage renal failure. Risk factors for a poor prognosis include severe proteinuria, hypertension, older age, male gender and impaired renal function. Therapy should include an ACE-Inhibitor and/or angiotensin-II receptor blocker to lower proteinuria (blood pressureor =130/80 mmHg). The majority of patients should be observed for six months whilst receiving conservative treatment before deciding about an immunosuppressive approach. The debate over its management continues today. Steroids alone are ineffective. Evidence-based medicine supports the use of cyclosporine or the Ponticelli regimen (monthly cycling routine of chlorambucil or cyclophosphamide alternating with prednisone). |
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