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A case of microscopic polyangiitis associated with aortic valve insufficiency
Bae Keun Kim1, So-Yeon Park, Chan-Bum Choi
1Division of Rheumatology, Department of Internal Medicine, Hanyang University College of Medicine, #17 Haengdang-dong, Seongdong-gu, Seoul 133-792, Korea.
Rheumatology International
|December 2, 2010
Summary
Microscopic polyangiitis (MPA), an ANCA-associated vasculitis, rarely affects large vessels. This case highlights MPA causing severe aortic valve insufficiency and glomerulonephritis, leading to a fatal outcome.
Area of Science:
- Cardiology
- Nephrology
- Rheumatology
Background:
- Microscopic polyangiitis (MPA) is a small-vessel vasculitis associated with anti-neutrophil cytoplasmic antibodies (ANCA).
- Large vessel involvement, such as the aorta, is uncommon in MPA.
- Aortic valve insufficiency is a rare manifestation of ANCA-associated vasculitis.
Observation:
- A 56-year-old man presented with fever, rash, and rapidly progressive glomerulonephritis.
- He was positive for P-ANCA and anti-myeloperoxidase (MPO) antibodies.
- Echocardiography revealed progressive acute aortic valve insufficiency.
Findings:
- Histopathology confirmed necrotizing arteritis and pauci-immune glomerulonephritis consistent with MPA.
- The patient's presentation and serology supported a diagnosis of MPA.
- MPA was identified as the likely cause of severe acute aortic valve insufficiency.
Implications:
- This case expands the spectrum of MPA manifestations to include severe aortic valve insufficiency.
- It underscores the importance of considering MPA in patients with unexplained glomerulonephritis and cardiac valve abnormalities.
- Early recognition and treatment of MPA may be crucial in preventing severe cardiovascular complications.
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