Related Experiment Videos
Spontaneous and protracted partial remission of microscopic polyangiitis
Martin Plaisance1, David J A Goldsmith
1Nephrology and Transplantation, Guy's and St-Thomas' NHS Trust, Guy's Hospital, London, United Kingdom.
Summary
Microscopic polyangiitis (MPA) is a serious vasculitis. A rare case shows prolonged survival without treatment, defying typical rapid kidney decline and highlighting treatment refusal
Area of Science:
- Nephrology
- Rheumatology
- Immunology
Background:
- Microscopic polyangiitis (MPA) is an idiopathic small vessel vasculitis often leading to kidney damage and failure.
- MPA is characterized by necrotizing glomerulonephritis and is frequently associated with myeloperoxidase-antineutrophil cytoplasmic autoantibodies (MPO-ANCA).
- The condition typically requires prompt immunosuppressive treatment to prevent rapid renal function decline and potential dialysis.
Observation:
- A 52-year-old woman with MPA, MPO-ANCA positivity, and renal impairment refused treatment for nearly a decade.
- Despite refusing treatment, her renal function remained stable with persistent proteinuria and hematuria.
- A late renal-pulmonary relapse occurred, necessitating brief immunosuppression.
Findings:
- This case challenges the typical aggressive progression of MPA, demonstrating prolonged renal stability without immunosuppression.
- Persistent MPO-ANCA positivity and sub-nephrotic proteinuria were noted despite stable renal function.
- The patient experienced a late-onset renal-pulmonary relapse, indicating disease activity despite the prolonged quiescent period.
Implications:
- This rare case suggests that some MPA patients may have a more indolent disease course than typically observed.
- It underscores the variability in MPA presentation and progression, even in the presence of diagnostic biomarkers.
- Further research is needed to understand factors influencing MPA's clinical course and the potential for long-term remission without immunosuppression.