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Spontaneous remission of nephrotic syndrome in idiopathic membranous nephropathy

Natalia Polanco1, Elena Gutiérrez, Adelardo Covarsí

  • 1Hospital 12 de Octubre, Madrid, Spain.

Journal of the American Society of Nephrology : JASN
|January 30, 2010
PubMed

Insights

Spontaneous remission is common in idiopathic membranous nephropathy, with a >50% proteinuria decline in the first year predicting favorable outcomes. This condition often leads to a low relapse rate and reduced risk of end-stage renal disease.

Area of Science:

  • Nephrology
  • Immunology

Background:

  • Idiopathic membranous nephropathy (IMN) is a leading cause of nephrotic syndrome in adults.
  • Spontaneous remission is a known feature of IMN, but predictors and long-term outcomes require further investigation.

Purpose of the Study:

  • To identify predictors of spontaneous remission in patients with IMN receiving conservative therapy.
  • To evaluate the long-term outcomes, including relapse rates and progression to end-stage renal disease (ESRD), associated with spontaneous remission in IMN.

Main Methods:

  • Retrospective, multicenter cohort study involving 328 patients with IMN and nephrotic syndrome.
  • Analysis of baseline characteristics, treatment, proteinuria levels, serum creatinine, and follow-up data to identify remission predictors.
  • Assessment of relapse rates, death, and ESRD incidence in patients with and without spontaneous remission.

Main Results:

  • Spontaneous remission occurred in 32% of patients, with a mean time to remission of 14.7 months.
  • Significant predictors for spontaneous remission included lower baseline serum creatinine, lower baseline proteinuria, use of ACE inhibitors/ARBs, and a >50% decline in proteinuria within the first year.
  • Relapse rate was low (5.7%), and spontaneous remission was associated with significantly lower rates of death and ESRD.

Conclusions:

  • Spontaneous remission is a frequent outcome in IMN patients managed conservatively, associated with favorable long-term prognosis.
  • A significant reduction in proteinuria (>50%) during the first year is a strong predictor of spontaneous remission.
  • Conservative management of IMN can lead to favorable outcomes, emphasizing the importance of monitoring proteinuria trends.

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